Author Topic: Tandem-rotor Helos Inspiration thread  (Read 31603 times)

Offline Weaver

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Tandem-rotor Helos Inspiration thread
« on: April 30, 2013, 09:17:59 AM »
Thought we could do with one for Chinooks, but might as well expand it to Sea Knights, Belvederes, Yak-24s etc..., so here you go, a place for all your twin egg-whisk ideas.  :)

What prompted me were a couple of things that led to a couple more things:

1. Has there ever been a proposal for a skinny-fuselage flying crane version of the Chook, a la CH-54 Tarhe? if not, then this is something whiffdom could recify.....

EDIT: yes there was - see here: http://www.secretprojects.co.uk/forum/index.php/topic,565.15.html


2. Whilst looking up point 1, I found this, which looks very doable:



Quote
from here: http://aviationtrivia.blogspot.co.uk/2009/11/first-flying-on-27-may-1970-boeing.html

First flying on 27 May 1970, the Boeing Vertol 347 testbed was a modified CH-47A Chinook (aircraft 65-07992) used for Boeing's HLH (Heavy Lift Helicopter) program. The helicopter featured just over 9 foot extension of the forward fuselage cabin, a raised aft rotor pylon, four bladed rotors that were two feet longer than a standard Chinook blade, fly-by-wire controls and retractable landing gear.

But the most unique feature of the Model 347 was a variable-incidence wing that created extra lift to offload the main rotors. There was also a retractable gondola in the forward fuselage that had a full set of flying controls during flying crane operations. As the twin rotors no longer overlapped, some degree of noise reduction was also achieved. The Model 347's performance was greater than that of the standard Chinook, but flight testing ended in 1975 with the cancellation of the HLH program.




Excellent page about it here: http://www.chinook-helicopter.com/history/aircraft/A_Models/65-07992/65-07992.html


3. I also found this:




4. And, of course, this:



from here: http://www.diseno-art.com/news_content/2012/11/boeing-vertol-xch-62/
« Last Edit: April 30, 2013, 09:29:36 AM by Weaver »
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Offline jcf

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Re: Tandem-rotor Helos Inspiration thread
« Reply #1 on: April 30, 2013, 09:48:33 AM »
Westland concepts:






« Last Edit: July 14, 2018, 07:08:07 AM by jcf »
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Offline Weaver

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Re: Tandem-rotor Helos Inspiration thread
« Reply #2 on: April 30, 2013, 10:15:46 AM »
Nice one Jon.

There was a pretty Saunders Roe Project called the P514 Rotorcoach that had a low-mounted wing amidships and a ducted fan behind the aft rotor pylon: I don't suppose you have a 3-view of that do you?

EDIT: found one on this thread: http://www.secretprojects.co.uk/forum/index.php/topic,3196.msg25758.html#msg25758

« Last Edit: April 30, 2013, 10:18:48 AM by Weaver »
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Re: Tandem-rotor Helos Inspiration thread
« Reply #3 on: April 30, 2013, 05:16:02 PM »
I've long thought of trying to do a Ch-46 based gunship in the same vein to the Mi-24D
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Re: Tandem-rotor Helos Inspiration thread
« Reply #4 on: April 30, 2013, 05:17:10 PM »
That 200 seat one is nice.
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Offline Weaver

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Re: Tandem-rotor Helos Inspiration thread
« Reply #5 on: April 30, 2013, 07:09:41 PM »
I've long thought of trying to do a Ch-46 based gunship in the same vein to the Mi-24D

Hmmm... with a long, slim fuselage, it could be armed with a whacking great recoilless gun........ >:D
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Offline elmayerle

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Re: Tandem-rotor Helos Inspiration thread
« Reply #6 on: May 01, 2013, 02:11:41 AM »
I've long thought of trying to do a Ch-46 based gunship in the same vein to the Mi-24D
Possibly using the ACH-47 as further inspiration?  *grin* Land and drop the rear ramp for the howitzer?
« Last Edit: May 01, 2013, 04:58:14 AM by elmayerle »

Offline Logan Hartke

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Re: Tandem-rotor Helos Inspiration thread
« Reply #7 on: May 01, 2013, 02:19:43 AM »
A tandem rotor helicopter with the armament of an Mi-24?  Been done in the real world.   :D



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Logan

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Re: Tandem-rotor Helos Inspiration thread
« Reply #8 on: May 01, 2013, 02:58:41 AM »
That's cheating... ;D
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Re: Tandem-rotor Helos Inspiration thread
« Reply #9 on: May 01, 2013, 03:00:19 AM »
Re the ACH-46, I was actually toying with stealing the cockpit/canopies + stub wings from either a Cobra or Hind-D.
« Last Edit: May 01, 2013, 03:02:40 AM by GTX_Admin »
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Re: Tandem-rotor Helos Inspiration thread
« Reply #10 on: May 01, 2013, 05:00:08 AM »
Re the ACH-46, I was actually toying with stealing the cockpit/canopies + stub wings from either a Cobra or Hind-D.
I'm thinking the cockpit/canopy from a Hind-A might work better, or at least serve as an inspiration (trying to fit it to a CH-53E showed the difference in fuselage depth to be pronounced, even in 1/72).

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Re: Tandem-rotor Helos Inspiration thread
« Reply #11 on: May 01, 2013, 05:28:04 AM »
Maybe if you were to raise the CH-47 cockpit upwards slightly, then graft on a OV-1 Mohawk cockpit in front and below of it ---

Adding turrets and such would be relatively easy I think.

Offline taiidantomcat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #12 on: May 01, 2013, 03:19:28 PM »










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Re: Tandem-rotor Helos Inspiration thread
« Reply #13 on: January 09, 2016, 05:29:14 AM »
Photo of Chinook in RAAF Service before the helicopters were all transferred to ARA:

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Offline upnorth

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Re: Tandem-rotor Helos Inspiration thread
« Reply #14 on: January 11, 2016, 12:32:02 AM »
There is of course the Piaseki H-16 Transporter:


net photo

Available in styrene from Revell in old box scale and in resin from Anigrand at 1/144


There was also the Filper Beta series:


net photo


net photo



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Offline kitnut617

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Re: Tandem-rotor Helos Inspiration thread
« Reply #15 on: January 11, 2016, 01:09:13 AM »
Photo of Chinook in RAAF Service before the helicopters were all transferred to ARA:



I see it has a white painted roof like some RAF ones, what was the purpose for painting it that way ?

Offline The Big Gimper

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Re: Tandem-rotor Helos Inspiration thread
« Reply #16 on: January 11, 2016, 01:57:24 AM »
Reflecting / reducing the absorption of solar generated heat? Note the RAF used white paint on top extensively for middle east and desert based A/C.
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Re: Tandem-rotor Helos Inspiration thread
« Reply #17 on: January 11, 2016, 02:59:24 AM »
Reflecting / reducing the absorption of solar generated heat? Note the RAF used white paint on top extensively for middle east and desert based A/C.

Exactly
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Offline jcf

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Re: Tandem-rotor Helos Inspiration thread
« Reply #18 on: January 11, 2016, 03:41:07 AM »
Yep, which is the same reason post-WWII airliners were/are primarily white or bare metal.
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Offline taiidantomcat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #19 on: January 13, 2016, 02:00:17 AM »






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Re: Tandem-rotor Helos Inspiration thread
« Reply #20 on: January 13, 2016, 02:43:55 AM »
A herd of Helo's.

I wonder were they get the money to pay for the fuel bill?
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Offline Frank3k

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Re: Tandem-rotor Helos Inspiration thread
« Reply #21 on: January 13, 2016, 02:51:17 AM »
The McCulloch MC-4:



is shown in flight at 1:22 in the 1954 Sci Fi movie, "Gog":

<a href="" target="_blank" class="aeva_link bbc_link new_win"></a>


It's not a bad movie and the robots are cool.

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Re: Tandem-rotor Helos Inspiration thread
« Reply #22 on: January 13, 2016, 04:33:15 AM »




Guess where I am going to visit on my next trip over to the US... ;)
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Re: Tandem-rotor Helos Inspiration thread
« Reply #23 on: January 13, 2016, 07:35:08 AM »
I wonder if they have a Bell HSL to go with all those other tandem rotor helicopters.  It wasn't that successful and I doubt there are many, if any, left.

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Re: Tandem-rotor Helos Inspiration thread
« Reply #24 on: January 13, 2016, 07:45:02 AM »
Cool.



But it needs a 3 bladed rotor. The two blades looks unusual.

Anigrand has a 1/72 kit.

Wikipedia Bell HSL Page
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Offline taiidantomcat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #25 on: January 13, 2016, 11:11:34 PM »
Gives me ideas  >:D

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Offline dy031101

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Re: Tandem-rotor Helos Inspiration thread
« Reply #26 on: January 14, 2016, 12:30:38 AM »
Shipboard ASW helicopter?  >:D

With appropriately-sized DDH?   >:D >:D
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Offline ChernayaAkula

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Re: Tandem-rotor Helos Inspiration thread
« Reply #27 on: January 14, 2016, 02:21:41 AM »
Cheers,
Moritz

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Re: Tandem-rotor Helos Inspiration thread
« Reply #28 on: January 14, 2016, 07:00:14 AM »
That would work too Moritz!  :D





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Re: Tandem-rotor Helos Inspiration thread
« Reply #29 on: January 15, 2016, 08:57:58 PM »
Quote
A tandem rotor helicopter with the armament of an Mi-24?  Been done in the real world.
A nice play on words and picture Logan!!  ;D

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Offline Logan Hartke

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Re: Tandem-rotor Helos Inspiration thread
« Reply #30 on: January 16, 2016, 12:30:24 AM »


Cheers,

Logan

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Re: Tandem-rotor Helos Inspiration thread
« Reply #31 on: May 27, 2017, 06:25:25 AM »
Just a cool photo:

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Re: Tandem-rotor Helos Inspiration thread
« Reply #32 on: December 15, 2017, 02:25:26 AM »
Quad Rotor conversion idea (not mine):

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Re: Tandem-rotor Helos Inspiration thread
« Reply #33 on: December 15, 2017, 02:26:20 AM »
ACH-47 info:


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Offline finsrin

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Re: Tandem-rotor Helos Inspiration thread
« Reply #34 on: December 15, 2017, 02:30:28 AM »
Quad Rotor conversion idea (not mine):




Know it can be done here at BTS !

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Re: Tandem-rotor Helos Inspiration thread
« Reply #35 on: March 25, 2018, 09:38:18 AM »
Found on Facebook. Boeing-Vertol 107-II Experimental helicopter



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Offline jcf

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Re: Tandem-rotor Helos Inspiration thread
« Reply #36 on: March 27, 2018, 03:27:32 PM »
“Conspiracy theory’s got to be simple.
Sense doesn’t come into it. People are
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actually is than they ever are about
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Re: Tandem-rotor Helos Inspiration thread
« Reply #37 on: July 14, 2018, 07:25:52 AM »
Boeing Heli-Cranes; Chinook Crane, Model 298, Model 301/XCH-62.





« Last Edit: July 14, 2018, 07:30:30 AM by jcf »
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Re: Tandem-rotor Helos Inspiration thread
« Reply #38 on: July 21, 2018, 06:36:14 AM »
Interesting
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Re: Tandem-rotor Helos Inspiration thread
« Reply #39 on: September 16, 2018, 09:06:48 AM »


In 1976, Boeing Vertol teamed up with Bell's Helicopter Division on a proposal for the Army's PLR (Power Lift Rotorcraft) program.

Designated XV-16A in the VTOL series, this clean-looking and able performer combined Boeing's experience with transport helicopters and Bell's expertise in VTOL, in this case capitalizing on the tilt-duct research that culminated in the highly successful X-22A prototype a decade before.

The PLR program was canceled despite a successful two-year evaluation phase because it was found that its advantages did not outweigh the 35% increase in costs from operating it instead of a conventional Chinook.

Source: FB and Deviant Art
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Re: Tandem-rotor Helos Inspiration thread
« Reply #40 on: September 16, 2018, 09:15:44 AM »
I like
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Re: Tandem-rotor Helos Inspiration thread
« Reply #41 on: September 16, 2018, 12:01:46 PM »
That looks so right!!

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Re: Tandem-rotor Helos Inspiration thread
« Reply #42 on: September 20, 2018, 05:09:19 AM »
Stephane does nail it at times.  :smiley:
“Conspiracy theory’s got to be simple.
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Re: Tandem-rotor Helos Inspiration thread
« Reply #43 on: November 23, 2018, 06:46:06 AM »
Post removed due to lack Tandem-rotor-ness.
« Last Edit: November 24, 2018, 03:09:36 AM by The Big Gimper »
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Re: Tandem-rotor Helos Inspiration thread
« Reply #44 on: November 24, 2018, 02:23:05 AM »
Errr...did't someone say something about tandem rotors....
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Re: Tandem-rotor Helos Inspiration thread
« Reply #45 on: November 24, 2018, 03:08:15 AM »
Errr...did't someone say something about tandem rotors....

Oh. I thought you wrote: Two engines in a near tandem configuration driving two rotors.   

The "Two engines in a near" and "configuration driving two" are silent.

:o
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Re: Tandem-rotor Helos Inspiration thread
« Reply #46 on: January 04, 2019, 02:43:38 AM »
Found on Facebook.  Caption is: H-21 Shawnee with B-29 gun turret



I have asked for additional details on this
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Re: Tandem-rotor Helos Inspiration thread
« Reply #47 on: January 04, 2019, 03:29:24 AM »
And a colour close up.



Looks to a great build once you replace the Wright R-1820 (1,425 hp) with a R2600 or a R2800!

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Offline elmayerle

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Re: Tandem-rotor Helos Inspiration thread
« Reply #48 on: January 04, 2019, 03:48:14 AM »
If memory serves me correctly, that was one of the early gunship experiments conducted by the US Army.

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Re: Tandem-rotor Helos Inspiration thread
« Reply #50 on: January 05, 2019, 03:08:14 AM »
Thanks Greg. I would still like to build it with in conjunction with an engine upgrade.
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Offline The Big Gimper

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Re: Tandem-rotor Helos Inspiration thread
« Reply #51 on: May 24, 2019, 11:34:20 PM »
Photoshop from Boeing of their submission to the Schwere Transporthubschrauber (STH) competition.

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Offline taiidantomcat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #52 on: May 25, 2019, 03:15:17 AM »
 :-* :-*

Someone going to do an MH-53K?  8)
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Re: Tandem-rotor Helos Inspiration thread
« Reply #53 on: July 16, 2019, 04:00:49 AM »
I've long thought of trying to do a Ch-46 based gunship in the same vein to the Mi-24D

A real world step in the right direction:



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Offline The Big Gimper

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Re: Tandem-rotor Helos Inspiration thread
« Reply #54 on: September 27, 2019, 01:52:52 AM »
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Offline Volkodav

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Re: Tandem-rotor Helos Inspiration thread
« Reply #55 on: September 27, 2019, 08:08:50 PM »
During planning for the Escort Cruiser by the RN, it was postulated that the an ASW version of the Chinook would be developed to make use of the extra deck space.


I know about the ships but haven't seen anything on the Chook version.  Earlier versions of the Escort Cruiser concept mentioned an ASW Belvedere.

Offline elmayerle

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Re: Tandem-rotor Helos Inspiration thread
« Reply #56 on: September 27, 2019, 11:44:42 PM »
If there was an ASW version of the Chinook, it would likely borrow from any ASW work done with the CH-46, it's smaller sibling.

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Re: Tandem-rotor Helos Inspiration thread
« Reply #57 on: September 28, 2019, 04:40:13 AM »
The enlarged sponsons with increased fuel tankage of the 234LR would a better way
to increase range.
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Re: Tandem-rotor Helos Inspiration thread
« Reply #58 on: February 27, 2020, 08:12:20 AM »
Finally... 10 years after the withdrawal of the last heavy transport helicopter of french armed forces (SA-321G Super Frelon of French Navy), a new one might come before 2025 to fill this gap  :-*

French Air Force is about to get 2 leased CH-47F and this might lead to the purchase of 6 to 12 A/C after 2025:

https://www.meta-defense.fr/2020/02/26/la-france-devrait-enfin-recevoir-des-helicopteres-lourds-chinook/
(in french)

https://translate.google.fr/translate?hl=fr&tab=wT&sl=auto&tl=en&u=https%3A%2F%2Fwww.meta-defense.fr%2F2020%2F02%2F26%2Fla-france-devrait-enfin-recevoir-des-helicopteres-lourds-chinook%2F
(translate via Google)

Offline taiidantomcat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #59 on: February 27, 2020, 10:45:50 AM »
Thats great news. Chinooks are really hard to beat
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Re: Tandem-rotor Helos Inspiration thread
« Reply #60 on: September 30, 2020, 03:30:06 AM »
Not for now...

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Offline jcf

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Re: Tandem-rotor Helos Inspiration thread
« Reply #62 on: December 04, 2020, 09:19:50 AM »
The first one is the Boeing-Vertol Model 107 aka CH-46 "Sky Night", not the Model 114 CH-47 "Chinook".

The Model 107 and 107-II were used in the airliner role.

The Model 234 is the civil variant of the Chinook, and they were operated by British Airways.


The 234LR has enlarged sponsons for increased full load.

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Offline apophenia

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Re: Tandem-rotor Helos Inspiration thread
« Reply #63 on: December 04, 2020, 09:25:39 AM »
The first one is the Boeing-Vertol Model 107 aka CH-46 "Sky Night"...

Which, to my eye, always had a jauntier look than the Chinook. Sleeker too with those flush-mounted turbines  :smiley:
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Offline elmayerle

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Re: Tandem-rotor Helos Inspiration thread
« Reply #64 on: December 04, 2020, 11:45:33 AM »
The Model 107 and 107-II were used in the airliner role.
Quite, PanAm and New York Helicopter Airline used them for shuttles between downtown NYC and the airports.  Some nice color schemes on them.

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Re: Tandem-rotor Helos Inspiration thread
« Reply #65 on: December 05, 2020, 02:53:49 AM »
I've long planned to do a Chinook using these markings:

« Last Edit: December 06, 2020, 02:43:11 AM by GTX_Admin »
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Offline Old Wombat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #66 on: December 05, 2020, 10:55:57 AM »
Image not showing, Greg. :icon_crap:
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Offline kitnut617

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Re: Tandem-rotor Helos Inspiration thread
« Reply #67 on: December 06, 2020, 12:04:53 AM »
Image not showing, Greg. :icon_crap:

Strange, it was yesterday ----

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Re: Tandem-rotor Helos Inspiration thread
« Reply #68 on: December 06, 2020, 02:43:25 AM »
Fixed.
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Offline aerospacer

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Re: Tandem-rotor Helos Inspiration thread
« Reply #69 on: December 06, 2020, 08:38:13 AM »
German readers of a certain age will immediately think of the Fliewatüüt ;): https://sinorecords.org/shangdengno1/
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Offline apophenia

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Re: Tandem-rotor Helos Inspiration thread
« Reply #70 on: December 06, 2020, 10:49:12 AM »
German readers of a certain age will immediately think of the Fliewatüüt...

And the title of Chapter 11 - Auf den Weg zu Plumpudding Castle - suggests that Fliewatüüt might be seasonally appropriate too  ;D
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Re: Tandem-rotor Helos Inspiration thread
« Reply #71 on: August 30, 2021, 08:22:18 PM »
Via the book of Faceness.





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Re: Tandem-rotor Helos Inspiration thread
« Reply #72 on: August 31, 2021, 01:31:22 AM »
Easier to hover I would think
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Offline Old Wombat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #73 on: August 31, 2021, 03:32:15 PM »
Looks like a Tracker flying overhead. :smiley:
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Re: Tandem-rotor Helos Inspiration thread
« Reply #74 on: March 29, 2022, 02:52:44 AM »
All hail the God of Frustration!!!

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Offline Old Wombat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #75 on: March 29, 2022, 10:21:41 AM »
There is a small, juvenile, possibly delinquent, part of my mind that always finds images of helicopters with IFR probes rather inappropriately amusing. ;)
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Offline raafif

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Re: Tandem-rotor Helos Inspiration thread
« Reply #76 on: March 30, 2022, 06:08:11 AM »
Boeing advert & a couple of my drawings

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Re: Tandem-rotor Helos Inspiration thread
« Reply #77 on: March 31, 2022, 01:35:26 AM »
All hail the God of Frustration!!!

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Re: Tandem-rotor Helos Inspiration thread
« Reply #78 on: May 25, 2023, 02:06:47 AM »
Random idea:  RNZAF CH-46 or CH-47 possibly in schemes similar to below:



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Offline Old Wombat

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Re: Tandem-rotor Helos Inspiration thread
« Reply #79 on: May 25, 2023, 09:22:21 AM »
http: not https:, so my computer security doesn't allow me to view those images, unless I copy & paste to each link & override the security.

Either of the first two would be good. :smiley:

Not keen on grey. ::)
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Offline Jonesthetank

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Re: Tandem-rotor Helos Inspiration thread
« Reply #80 on: May 25, 2023, 09:37:36 PM »
Quote
Random idea:  RNZAF CH-46 or CH-47 possibly in schemes similar to below:

Quote
Either of the first two would be good. :smiley:

Not keen on grey. ::)

Hold that thought....

I've got some CH46 and CH47 profiles knocking around somewhere.  I'll see if I can fish them out and post them here

Offline Jonesthetank

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Re: Tandem-rotor Helos Inspiration thread
« Reply #81 on: May 26, 2023, 05:19:25 PM »
Okay,  I had some of these knocking about from a while back and some I knocked up in response to the comments above


CH-47 in the original olive and yellow scheme


CH-47 in the later South East Asia wrap around scheme


CH-47 in the Euro 1 scheme


CH-47 in the Antarctic Orange Roughy scheme


CH-47 in NZ Army Air Corps colours


CH-46 in the original olive and yellow scheme


CH-46 in the later South East Asia wrap around scheme


CH-46 in the Antarctic Orange Roughy scheme

Cheers

Mark

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Re: Tandem-rotor Helos Inspiration thread
« Reply #82 on: May 27, 2023, 02:10:32 AM »
 :smiley:

Increasingly like the idea of a RNZAF CH-46.
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Offline Gingie

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Re: Tandem-rotor Helos Inspiration thread
« Reply #83 on: May 27, 2023, 02:22:43 AM »
That CH47+CH53 hybrid looks really great. I'm imagining a mobile surgical response team (MSRT) in a transportable pod.

 Slide 17 at the link shows the current configuration: https://www.sto.nato.int/publications/STO%20Meeting%20Proceedings/STO-MP-HFM-309/MP-HFM-309-33P.pdf