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Hughes P21-J MkIII Devastator "Crimson Skies" - 8/24/2012 10:10 PM   
badazzgti03


 

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Status: offline 		Hi Everyone!!!
well I have officially started this project. I have always loved the design of the Devastator from the Crimson skies game and I have seen old threats on RC groups and such on people building this plane but not a scale flying one. So I'm going to step in a take this challenge to build a scale Hughes P21-J MkIII Devastator! But this will be an update to the MKIV. There will be changes in the design to be a little bit more aerodynamic. This is going to be a very slow project but I'll post progress time to time. here is a little teaser of what I have started.
2D sketches



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RE: Hughes P21-J MkIII Devastator - 8/25/2012 1:32 AM   
N1EDM



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Status: offline 		Count me in as Lurker #1... It looks like it will be an interesting build...

Bob


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RE: Hughes P21-J MkIII Devastator - 8/25/2012 11:04 PM   
badazzgti03


 

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Status: offline 		Awesome!!!!!! Feel free to leave positive or negative feedback...constructive criticism is always welcome....

I plan on finishing up the 3 view drawing do some nice renderings and make a cad model on alias studio tools or rhino 3d. Then have a company laser cut the pieces out of wood and start the build.... Plan on having this around 1/5 or 1/4 scale... Haven't thought about a power plant yet any ideas always welcome.

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RE: Hughes P21-J MkIII Devastator - 8/27/2012 2:44 PM   
FlyerInOKC



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Status: offline 		Count me in too! The Devastator is a great project with some unique details. I'm surprised this plane doesn't get modelled more often!

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RE: Hughes P21-J MkIII Devastator - 8/27/2012 4:08 PM   
badazzgti03


 

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Joined: 11/16/2007
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From: Montgomery Village, MD, USA
Status: offline 		yes!! I'm surprised as well. I think this will be a fun..long project...pointers are always welcome too. This will be my first scratch built project...I have done kits before in the past. Hope all goes well.

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RE: Hughes P21-J MkIII Devastator - 8/27/2012 4:33 PM   
FlyerInOKC



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Status: offline 		The main thing to keep in mind is to keep it fun and don't rush thinking you need to meet some obituary schedule. Also don't forget there is more than one right way to do a lot of things when building from scratch. So don't forget to scan other builds for ideas and don't be afraid to change something. The best ideas are the ones that worked for someone else and you can see the how it worked. I think a lot of builders subscribe to builds because we learn something from every build we read. Another good source of information are kit manuals, several manufactures post their manuals on line so you can review them. I have bought more than one kit in the past I probably wouldn't have bought because I saw the manual first and fell in love with the kit! I have become addicted to Top Flite for this reason.

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RE: Hughes P21-J MkIII Devastator - 8/28/2012 3:16 PM   
badazzgti03


 

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Status: offline 		Flyer,
Good pointers. I have been lurking on other peoples scratch builds and such. I am in no rush at all to complete this anytime soon. when ever I get free time at work I do more sketches and design changes. Looking at other plans is a plus. Getting ideas for my frame/structure design as well as landing gear and such. I do love top flites aircraft as well I have several. Thanks for the pointers

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RE: Hughes P21-J MkIII Devastator - 9/5/2012 2:32 PM   
badazzgti03


 

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Status: offline 		Here is my revised final design 3 view drawing. Gonna start making a 3D CAD model and then make a mock up of it to see if it will fly and figure out weight and balances as well as design changes.





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RE: Hughes P21-J MkIII Devastator - 9/6/2012 3:02 PM   
badazzgti03


 

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Status: offline 		I have done minor changes to the 3 view...gotta design retract landing gear as well....well just the struts

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RE: Hughes P21-J MkIII Devastator - 9/13/2012 10:19 PM   
badazzgti03


 

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Status: offline 		here are some updates on the 3D model still have a lot to go





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RE: Hughes P21-J MkIII Devastator - 9/14/2012 9:18 AM   
BMatthews



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Status: offline 		You might want to cheat a little and try to get the interplane spacing to become equal to or larger than the bigger wing's chord a little more over the wing span. A narrow gap such as this ficticious design has over at least the inner half of the span will tend to produce a lot of drag and not a whole lot of lift.

I'd also suggest that you add a pitch controlling elevator to the fore wing in lieu of the elevators on the upper wing.

Other than that go for it. I still fondly remember playing the first half of Crimson Skies and I still plan on re-loading it on the new computer.

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RE: Hughes P21-J MkIII Devastator - 9/14/2012 2:35 PM   
badazzgti03


 

Posts: 276
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From: Montgomery Village, MD, USA
Status: offline 		I have pretty much got this models control surfaces planed out. its not going to have flaps but instead the "flaps" on the top wings are going to be speed brakes that split/flare open. The ailerons will be located at the wing ends of the lower wing. The elevator will be located on the inner of the lower wing and will be in sync with the canards. I hope that makes sense...As for the vertical stabilizer i haven't decided to used functional rudders or have the speed brakes on the top wings used as rudders kinda like the B2 bomber has on its wing tips.

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RE: Hughes P21-J MkIII Devastator - 12/27/2012 10:13 PM   
pedtool


 

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From: Belview, MN, USA
Status: offline 		I am look into building  2/3 modle experimental. unable to find prints .when you have finished would you sell a copy so that i can have a referance to start my design with? thanks pedtool

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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> Hughes P21-J MkIII Devastator "Crimson Skies"
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