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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> RE: Scratch Building, Aircraft Design, 3D/CAD FAQ
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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 1/5/2007 2:47 AM   
wendell5555


 

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From: San Francisco, CA, USA
Status: offline 		I have a 3D model of the 300 built using Form-Z. Not totally accurate as it is also based on 3-views. However I can scan actual aircraft and you would have to email me concerning solutions.

Wendell

< Message edited by wendell5555 -- 1/5/2007 2:48 AM >

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 1/5/2007 4:54 PM   
dicknadine


 

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From: Greensburg, LA, USA
Status: offline 		sorry I can't help you too much, as I am not a computor person. my experience goes back to the 1930's. the good old days when we bought a kit for 10 cents and it was one a day as long as there was grass to cut or snow to shovel for the nieghbors. in addition to the rest of my carreer as an auotmotive and aircraft draftsman and engineer, pre computor, few years military and 4 years of college didn't help the model activity too much. suggest that you look at a lot of plans for sizes that they specify for the various wing sizes and types of planes. dick

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 1/15/2007 4:12 AM   
jzak3


 

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From: germantown, WI, USA
Status: offline 		to whom it may concen: i am try to scratch build a b-25 mitchell and i have a freind of mine that has a cnc machine that would help me make the most important parts of this project the wing rib formers,i should tell you what kit it is. It is a royal products B-25 mitchell (maratuka),the thing that i need to know is what is the airfoil design?the wing is 70"wide if that helps ,i did some research on some sites and the real one has a S3012 air foil so i don't know if that would follow suit to the kit size.so if anyone can help me i would greatly appreciate it. you can e-mail me at jzak3@wi.rr.com thanx much.

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 1/29/2007 5:00 PM   
shelmire


 

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From: , PA, USA
Status: offline 		Can anyone tell me how to determine the CG of a Delta Wing aircraft. I am building an F-18 with twin Fan Ducts made from Foam. It is 4 'Long and the wing span is 3 ' wide. Is there a formula for deterimining the CG for a delta wing aircraft and can someone let me know how to calculate the CG. Also I have strakes on the aircraft are they also included in the calculations. My E-Mail address is jwspilot4@hotmail.com

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 2/4/2007 8:54 PM   
wisher


 

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From: Devils Lake, ND, USA
Status: offline 		Hey guys, looking for some help.I tried to put a 22cc gasser on the front of a telemaster, couldn't get it to balance- even shortened the nose - no help.So I put a .75 on the front and called it good.
Still want to build a gasser, this time I want a pattern plane.going to use the same incidences as a sig cobra because I like the way the plane flies. Any advice on the wing span and total weight? I would like to go with a tapered wing{I think they look better} Or am I expecting to much from a converted engine?

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 4/15/2007 8:56 PM   
zjurgen


 

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From: , NY, USA
Status: offline 		I should add that you can get a free copy of autodesk inventor if you are a student from autodesk.com

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 6/7/2007 10:42 PM   
Tomcat Tech


 

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From: Bangkok, THAILAND
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Hi Starwoes,

I worked on F-14A s while in the Navy in the early 80's. (VF-1 Wolfpack stationed at Miramar) Primarily electrical systems which affect all aspects of the aircraft. The Tomcats flaps are fowler flaps. The inboard flaps roll down small tracks when extended. There is a small panel running the length of the wing, hinged on the wing surface, that then drops down to cover the gap between the wing structure and the extended flap. This "door" was controllable from a thumb-wheel on the joystick. This system was used on landing approach to dump lift enabling the pilot to maintain glide slope. The pilot would roll the thumb-wheel and the doors sealing the gap between wing and flap would open proportionally. Air from under the wing would then flow up through the gap made by the door and join the air stream over the flap and the aircraft would descend. Keep in mind landings are made with a high AOA.

The outboard flaps were hinged at the trailing edge of the wing and would be deployed in flight as "Maneuvering Flaps". The Tomcat had no conventional ailerons. Roll control was through spoilers and use of the stabilators. (Stabilizer/elevators). In my opinion, for a model, stabilators should work just fine.

Craig.

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 10/6/2007 4:16 AM   
1Way


 

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From: Bristol, IN, USA
Status: offline 		I hope I didn't miss something, but a predominant assumption seems to be that a single software program for going from concept to a functional 3D aircraft. Do we really need to have a separate software program for each of the following?
form design = CAD/MODELING
lift+propulsion surfaces = technical airfoil coefficient stuff
engine+control system = ?
aircraft flight handling characteristics = flight sim
graphics = paintshop pro, corel draw, etc.

The graphics area is understandably specialized, but what about the rest?

Is there a particularly good (RC-small aircraft sized) aircraft design program for
ease of use
moderate learning curve
functionally powerful yet user friendly

I'd like a program for designing new aircraft design. Seems like if you do a good job with flight modeling (wind/fluid dynamics), your most of the way there.

Man, it's been a long while since I've posted here. Good to be back. I can't hardly believe how fabulous these forums are slicked out!!! LOVE IT!

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 10/30/2007 3:10 AM   
pfatz



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From: Mena, AR, USA
Status: offline 		Hey Mike I tried your link and it would not go through. Any chance of a typo??

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 11/5/2007 12:53 AM   
mazeetwazaad


 

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From: tampa, FL, USA
Status: offline 		mike james new site is http://www.nextcraft.com great crafts there. made me get into cad and now im trying totake that into construction of an actual model.


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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 11/9/2007 6:50 PM   
madfreestyler


 

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From: newportuk, UNITED KINGDOM
Status: offline 		Hey mazeetwazaad what cad package are you using?

Im trying to turn a sketch into a 3d model then hopefully from that into a real model, interested to see how other people are doing it.



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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 11/14/2007 4:45 AM   
mazeetwazaad


 

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Status: offline 		The programs i used there were TurboCad 2d v14 and Gmax. Currently trying to learn ViaCad though. HIt a snag in the process and hopefully cad will ameliorate things

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 12/2/2007 12:24 AM   
Mdhat



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From: Lockport, NY, USA
Status: offline 		I have a question about working with balsa. I am triing to cover my wing ribs and making curses / bends how do you shape the wood. I thought of soaking it with water but figured balsa is so dry it would absorb and swell changing the thickness. What about heat? Or just slowly let it warp itself by tiing down with rubber bands or something?

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 9/5/2008 12:35 PM   
sam.solids


 

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From: bangalore, INDIA
Status: offline 		Hi could you kindly give me the file. I work on proE, CAD for our injection mould tool design I could add to the current work.

Regards
Samuel

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 11/20/2008 3:18 PM   
SigMan



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From: Boonville, IN, USA
Status: offline 		i have a spare 80" WS wing in perfect condition from a SiG Senior ARF, and i was thinking of using some square PVC or somthing for a fusealage, and some lite aluminum for a tail boom.. something like one of those Duraplane kits.

i have always assembled ARF planes and this would be my first attempt at homemade project. any idea's would greatly be appreciated...thanks !

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 12/4/2008 9:29 AM   
SABREPD


 

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From: Colchester, UNITED KINGDOM
Status: offline 		Hi,
I`ve only built and flown electric models but have decided to give i.c. a go. It may be a stupid question but do you sort out the centre of gravity with or without fuel in the tank.

Many Thanks Nige.

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 12/4/2008 11:47 AM   
SigMan



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From: Boonville, IN, USA
Status: offline 		empty the tank b-4 balancing.

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 12/10/2008 9:47 PM   
navee8or


 

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Joined: 9/23/2008
Last Login: 11/5/2009
From: I am Retired, MA, USA
Status: offline 		I am not new to building (or should I say)assembling airplanes of all sizes so I do have some skills(?) I you kind people could give me the info for designing and building a scale cocpit for one of my larger civilian/general aviation type planes. What it is is a gp Lancair which I have over the period of a year have been adding detail to the plane including scale nose strut, functioning nav and landing lights, and hgand hols and step bars. The only thing I haven't attempted is the cockpit , for some reason I start to think about doing it and my mind goes blank. Can some one please get me started, I'm sure once I get a push I'll get the idea and finish it. Thank you in advance for any help youcan provide me. Jerry

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 1/25/2009 2:14 AM   
Mike James



Posts: 2528
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Joined: 1/19/2002
Last Login: 11/8/2009
From: Anchorage, AK, USA
Status: online 		Hi everybody,

Some of my old links from years ago are no longer valid, so here's a quick update. All of my RC-related work is on http://www.nextcraft.com with the specific design-related articles being at http://www.nextcraft.com/rcdesignandbuilding.html

If you're interested in 3D work in general, that work is now located at http://www.mikejamesmedia.com (currently using "modo", which is a great 3D modeling package.
Have fun!


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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 3/19/2009 1:46 AM   
donnyman


 

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From: Manor, TX, USA
Status: offline 		Statwoes nice work! I used a simpler method to get to this stage and beyond. Plans.

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 3/23/2009 6:03 PM   
bugs.hill


 

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From: durban, SOUTH AFRICA
Status: offline 		Hi,
i am looking for plans for a edge 540 or yak 54.
preferably in cad format but any will do.
thanks

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 7/5/2009 3:52 PM   
Lafayette


 

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From: Geneva, , SWITZERLAND
Status: offline 		Reagrding Post # 20,

Can those dimensions be applied to a low wing aircraft?

Lafayette.

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RE: Scratch Building, Aircraft Design, 3D/CAD FAQ - 7/5/2009 9:56 PM   
roscoedude


 

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From: Garfield Hts., OH, USA
Status: offline 		Hi guys, been pretty much a lurker on RCU, but this thread is right up my ally so I thought I'd share a few pics of my SolidWorks '04 CAD models, one of which I did a scratch build on. Been using SW since '98 off and on, plus a few other CAD and CAM softwares.

Dean

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