Beyond The Sprues
Current and Finished Projects => Physical Models => Aero-space => Topic started by: Robomog on November 21, 2020, 03:04:39 AM
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Hi All
This ones going to be a challenge for me as its going to need a vast amount of accurate cutting, not like my cut and shut style of modelling.
Here's the inspiration courtesy of Tophe, I had a word with him on WhatIf and he is happy for me to plagiarise his creation.
(https://live.staticflickr.com/65535/50622706272_749489180c.jpg) (https://flic.kr/p/2k8mAUy) (https://flic.kr/p/2k8mAUy) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
I'm going to build it slightly different with no rocket engines but with two piston engines driving contra-rotating props, the placement of the oil cooler and tail planes may also be different but you get some idea of the project.
I'm using a pair of these
(https://live.staticflickr.com/65535/50622697547_b1d6c20f69_z.jpg) (https://flic.kr/p/2k8myj8) (https://flic.kr/p/2k8myj8) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
and here is progress so far, just trying to work out the cuts as to add another engine I will need to extend the fuselage both front and back so as to balance out the weight and maintain the centre of gravity
(sortof :D)
(https://live.staticflickr.com/65535/50622693752_21e1c29243_z.jpg) (https://flic.kr/p/2k8mxbG)20200728_220713 (https://flic.kr/p/2k8mxbG) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Gonna be a slow project.......
more when it happens
Mog
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good direction !
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Best wishes on "accurate" cutting !
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Measure once, cut twice! Or is it measure twice, cut once?
Interesting project! What are you going to use for the two remaining tail fins?
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Shades of this Supermarine project. It'll be interesting to see where you go with this ---
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Thanks for the comments guys
Eric: Thanks
Finsrin: gonna try and be accurate but I can see it degenerating into bodge and filler
Frank: I've taken both tail fins off so that I can centre the tail, I will probably use the four tailplanes with a plastic fillet
Kitnut: wow never knew that one existed !
Mog
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Measure once, cut twice! Or is it measure twice, cut once?
Interesting project! What are you going to use for the two remaining tail fins?
Cut three times, measure once.
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Hi all
Finally committed to cutting plastic, but it hasn't gone to well partly my fault, partly equipment.
The vertical cuts with the razor saw went swimmingly but the horizontal cuts went awry due to an out of kilter cutting disk resulting in a very rough and wide cut on one side, I finished the other cuts with a sharp knife but the results weren't pretty.
Here's the first cuts
(https://live.staticflickr.com/65535/50655099542_80fbdf2629_z.jpg) (https://flic.kr/p/2kbdCid) (https://flic.kr/p/2kbdCid) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
I originally intended to invert the rear engine but this would have put the exhaust stacks virtually on top of the wing so it was redesigned to be back to back, unfortunately I then realised the engines were too close together so I had to part them and add a spacer between the two which became a bit of a bodge to make them line up.
Here's a the story so far, and a quick mockup to make sure everything is going in the right direction.
(https://live.staticflickr.com/65535/50655010116_21ef62800a_z.jpg) (https://flic.kr/p/2kbdaHo) (https://flic.kr/p/2kbdaHo) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/50654269578_bfdfbddc34_z.jpg) (https://flic.kr/p/2kb9nzu) (https://flic.kr/p/2kb9nzu) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
I used both engines so that I could line up the exhaust stacks, the rear engine will be faired into the body with filler. I will need to add a bigger air intake and will relocate the oil coolers probably under the wings.
This is a case of "yea I measured it carefully, but still managed to screw it up" you can always hide a lot of mistakes under a layer of filler tho ::)
Thanks for looking
Mog
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Hi all
Made some progress, the rear fuselage has been reunited with the wings. I was originally going to fashion and fix the rear fins before i carried out this operation but found i had no reference points to line them up properly so i have decided to just cut the slots and leave the fins till later. This will also allow me to align them and also adjust the undercarrige so the aircraft is properly vertical.
(https://live.staticflickr.com/65535/50688373788_12dc050e64_z.jpg) (https://flic.kr/p/2keaaz7) (https://flic.kr/p/2keaaz7) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
You can see the gash made by the faulty cutting disk ( yea, yea a bad workman always blames his tool !) The other side is a little less violent
(https://live.staticflickr.com/65535/50689124766_654df25482_z.jpg) (https://flic.kr/p/2kee1P1) (https://flic.kr/p/2kee1P1) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Still undecided where to put the radiators/oil coolers, will probably leave them in the tail
More when it happens......
Mog
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I'm thinking wing leading edge radiators like the Mosquito had might work for one engine. Been scheming a Ki-64-II with a mix of radiators like that, rather than evaporative cooling in the wing, and a combining gearbox driving one large multi-blade propeller rather than two contra-props.
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Hmmm leading edge radiators would work nicely, leaving the original for the other engine, unfortunately I will have to reinstate/rebuild the intake duct doh !
My intention is for the propellers to be contra rotating and have one engine each.
I also have to add a second air intake for the rear engine, maybe I should have done a little more groundwork before I started :-[
Mog
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... unfortunately I will have to reinstate/rebuild the intake duct ...
Maybe its the contra-props, but this made me think of the paired radiators of the Fisher P-75. Always liked the look of them.
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unfortunately I will have to reinstate/rebuild the intake duct doh !
Mog
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Or just use the spare fuselage you have there ----
There was a number of British projects that were designed to have tandem piston engines with each engine powering one of the contra-props, the rear engine was mostly set a little higher in the fuselage so the driveshaft would pass through the 'Vee' of the front engine.
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... unfortunately I will have to reinstate/rebuild the intake duct ...
Maybe its the contra-props, but this made me think of the paired radiators of the Fisher P-75. Always liked the look of them.
Genius ! Problem solved :smiley: :smiley: :smiley: :smiley:
Kitnut617: thanks, that's how I'm going to feed the second prop in a sort of P-39 style. I'm keeping the the second fuselage In case all else fails ;D
Mog
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Very promising thus far! 8)
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Thanks Zac, more when xmas rush subsides, sometimes you just hate the real world ;D ;D
Mog
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Hi All
Another milestone crossed, a good deal of the PSR on the fuselage is done and the nose is attached.
Leaving it now to let the glue dry thoroughly, then it's back to PSR to bring it all together
(https://live.staticflickr.com/65535/50764535636_6314fa606b_z.jpg) (https://flic.kr/p/2kkTvQq) (https://flic.kr/p/2kkTvQq) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Tail construction next.
Thanks for looking ........
Mog
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That's some major PSR! But as you said:
(https://i.imgflip.com/4rpupu.jpg)
The tail should be interesting.
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Very interesting so far
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Hi all
Major PSR on the nose is virtually complete, I'm still finding the odd pin hole or depression in the filler and it will need its final sanding to eradicate any sanding scratches but to all intents and purposes its finished.
Did I say tail construction next, I lied. I have started on the tail planes but I decided to get the radiator/oil cooler duct in place first.
(https://live.staticflickr.com/65535/50819436331_2158c341b6_k.jpg) (https://flic.kr/p/2kqJTU8) (https://flic.kr/p/2kqJTU8) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
As you can see I have adopted a design as suggested by Apophenia using some plasticard tube and a spare Hawker Hurricane radiator.
{sigh} more PSR
More when it happens.........
Mog
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Hi all
The radiator/oil cooler array is almost complete so I have started on the tail planes. This is going to be tricky as every thing has to line up so that the wheel cylinders are upright
(https://live.staticflickr.com/65535/50830461093_7e37c5ac40_k.jpg) (https://flic.kr/p/2krHpbe) (https://flic.kr/p/2krHpbe) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Currently adding a fillet to the tailplanes and sanding to an aerofoil shape.
More when it happens
Mog
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Those tweezers/clamps are a sure sign that major surgery will soon be under way!
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In my humble opinion you can't have too many reverse tweezers ;D ;D
Mog
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Hi All
Now that the Police Apache is complete I can get back to this one.
The tail fins are finished as is the radiator/oil cooler intake. I was hoping to mount the wing tip wheels last but soon realised that I had to attach them to the tail fins in order to line every thing up (this has been a constant theme throughout this build). These are all attached now and it is time to construct the tail assembly.
(https://live.staticflickr.com/65535/50874721401_683e8cddef_z.jpg) (https://flic.kr/p/2kvCfdZ) (https://flic.kr/p/2kvCfdZ) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
The top fin is in place, I am going to let this dry thoroughly so it will become a template to line up the other three fins.
When all this is done it will be time to find out if it will sit on its tail as intended (audience gasp :o)
Tune in next week folks............... ::)
Thanks for looking ....
Mog
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Success !!!!
(https://live.staticflickr.com/65535/50882125877_bf17e8c631_k.jpg) (https://flic.kr/p/2kwhcjn) (https://flic.kr/p/2kwhcjn) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Not only does it stand without rocking its perfectly upright !!
Result !
He shoots, he scores ! Yessssssss !
Ahem ......... cough cough
Err, sorry about that, got a bit carried away :-[
More when it happens.....
Mog
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Congratulations on getting this far and the success you are experiencing with the build. :smiley:
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;D :smiley:
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Wow - his is looking good! I'm glad it can stand on its own!
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Thanks guys,
Apologies, i'm not normally that over the top, but if i had not got the geometry right on this kitbash it would have been a show stopper. There was absolutly no wiggle room on this one ;D ;D ;D
Mog
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I like the concept, though It looks really unusual compared to most of the tail-sitters - tall and lean as opposed to squat and, ah, stocky. I think it's going to turn out very nice.
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You have every right to be chuffed, 'Mog, that was not an easy challenge to pull off successfully! :icon_alabanza:
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Thanks chaps,
Just a little more PSR, then it will be off to the paint shop.
Mog
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Hi all
This one went to the backburner while I completed the X3 Spaceliner but I'm glad to announce it has been completed. Here's the pics........
First in it's natural takeoff/ landing position
(https://live.staticflickr.com/65535/51091349885_de7a571b65_c.jpg) (https://flic.kr/p/2kQLwjR) (https://flic.kr/p/2kQLwjR) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/51089925597_228a891d35_c.jpg) (https://flic.kr/p/2kQDdWa) (https://flic.kr/p/2kQDdWa) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/51089835746_1b8984bd9b_c.jpg) (https://flic.kr/p/2kQCLe1) (https://flic.kr/p/2kQCLe1) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/51089925597_228a891d35_c.jpg) (https://flic.kr/p/2kQDdWa) (https://flic.kr/p/2kQDdWa) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Then some in flying attitude....
(https://live.staticflickr.com/65535/51089835596_020905b70a_c.jpg) (https://flic.kr/p/2kQCLbq) (https://flic.kr/p/2kQCLbq) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/51089922337_40a45400cf_c.jpg) (https://flic.kr/p/2kQDcXX) (https://flic.kr/p/2kQDcXX) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/51089922307_1b4df65c70_c.jpg) (https://flic.kr/p/2kQDcXr) (https://flic.kr/p/2kQDcXr) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
(https://live.staticflickr.com/65535/51090644155_6efa14d043_c.jpg) (https://flic.kr/p/2kQGUx6) (https://flic.kr/p/2kQGUx6) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
And of course the scale shot....
(https://live.staticflickr.com/65535/51092730379_e0d5058212_c.jpg) (https://flic.kr/p/2kQTAGt) (https://flic.kr/p/2kQTAGt) by Robomog (https://www.flickr.com/photos/54032744@N08/), on Flickr
Thanks to Tophe for letting me highjack one of his designs, as always all comments and criticisms gratefully accepted.
Mog
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Going up! ;D
8) :smiley:
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8) 8) I think Superman's line from the old cartoons works well here, "Up, up, and away!"
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Inspired and classy. Long cowl with dual props is cool. 8)
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:smiley: :smiley: :smiley:
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V
E
R
Y
N
I
C
E
!
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;D ;D ;D nice one Mr Gimper! ;D ;D ;D
And thanks Guys......
Mog
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It came out great! I love the s t r e t c h e d fuselage with the two engines.
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Thanks Frank, to keep the COG about right (Whiffworld ? COG ?) I moved the first engine forwards and the cockpit back to insert the second engine in order to achieve a sort of balance. Turned it into a long skinny airplane :D
Mog
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:smiley:
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That worked out rather well! Fantastic!
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Would definately please Tophe ;D Excellent build :smiley:
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Thanks chaps..
Apophenia: posted on Whatif as well, Tophe was well impressed. I have been inducted in to the Tophe canon of alternative aircraft, I'm very happy with that :smiley:
Mog
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White works well on Navy Vertistang :smiley: Would not thought of it myself.
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Thanks finsrin, i pinched the colour scheme from the Convair XFY Pogo.
Mog
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... Tophe was well impressed. I have been inducted in to the Tophe canon of alternative aircraft, I'm very happy with that ...
Always an honour ... and well-deserved 'Mog :smiley: :smiley: