Author Topic: Tandem-rotor Helos Inspiration thread  (Read 39458 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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Offline GTX_Admin

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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



Cheers,

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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Offline elmayerle

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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).

Offline kitnut617

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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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Offline The Big Gimper

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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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Offline elmayerle

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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.

Offline The Big Gimper

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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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