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Old 04-24-2011, 03:21 AM   #1
Sniperp
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Default (design ideas) F-35 VTOL

Looking at January when I get back from deployment of scratch building a foam F-35 with full VTOl capability. I know it's goin tk be a long road, and a ways off, but figured if I start planning now when January rolls around i should be able to just start building and have most of the bugs already figured out. Also I know there's a section fr scratch builds but figured more eyes would see this here and can get more feedback.

I already figure I'll need 4 separate motors and speed controllers,
Main motor in the rear with a movable nozzle
Second main motor right behind the pilot, guessing I'll need it to be as powerful as the rear main to contour it's thrust
2 small ones on each side to help with roll control in hover or VTOL mode
The smaller ones won't have to be to big and they won't be a constant running either just kick on when the plane starts to roll or I give control to roll.
Also figure I'll have 2 different gyros
1) on mains to help control pitch in VTOL mode
2) on side motors to help with roll control
Will need the gyros, side motors, and forward main to cut off in normal flight.
Still debating on having a hatch cover the forward main because on the real plane it's used as an airbrake to slow down for forward transition to VTOL
Looking at about a 4 foot wing span and about 5-6 feet long, figure tht should give me a decent amount of space to work with. Also going foam with it at first, I know it's going to crash alot at first so foam would be easy to repair, so if anyone k ows of a good supplier and carving methods because I've never worked with foam before an this will be my first scratch build.
Radio programing, will a DX8 be sufficient enough to handle what I want or will I have to go bigger, want to stay spectrum as I already own 6 aircraft that use my DX6i.
Sorry for the jumping around I just typed as things came to me.
Any and all comments and suggestions would be appreciated thank you.
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Old 04-24-2011, 03:26 AM   #2
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Cool

Hi
Pleased to meet you
Very ambitious build im trying some thing equally as hard to get operating correctly
http://www.wattflyer.com/forums/show...=ryan+vertifan
Cant wait to see more of your buildand best wishes with it
Take care
Yours Hank

"When wild the head-wind beat,Thy sovereign Will commanding, Bring them who dare to fly, To a safe landing."
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Old 04-24-2011, 04:18 AM   #3
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LOL

You two have remarkably similar projects with almost the same design problems to over come - yet two completely different craft

I wish you both the best of luck - you're going to need it!

The main problem for both of you is the horrible IN-efficiency on ducted fans. They truly "suck" at producing raw thrust - which is the one thing you must have for VTOL.

I think I need a signature.
Larry
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Old 04-24-2011, 05:16 AM   #4
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Originally Posted by Larry3215 View Post
LOL

You two have remarkably similar projects with almost the same design problems to over come - yet two completely different craft

I wish you both the best of luck - you're going to need it!

The main problem for both of you is the horrible IN-efficiency on ducted fans. They truly "suck" at producing raw thrust - which is the one thing you must have for VTOL.
Hi Larry
When i saw this threads title i thought the same thing
And i know what you mean, im sorely tempted to go with a gas turbine instead of multiple EDFs to get the proper amount of thrust
Take care dear friend
Yours Hank

"When wild the head-wind beat,Thy sovereign Will commanding, Bring them who dare to fly, To a safe landing."
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Old 04-24-2011, 09:36 AM   #5
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I was thinking that to but I just don't have the money to sink into a turbine. And the foam IA also going to be my teat bed. Once I get it flying decently to my liking im going to build either a wood or plastic frame and make a true plane out of it.
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Old 04-24-2011, 10:20 AM   #6
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Some neet stuff here on this link

http://www.rcpowers.com/forum/showth...IGO-OSPREY-etc)


I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 04-24-2011, 10:26 AM   #7
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I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 04-24-2011, 10:30 AM   #8
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I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 04-24-2011, 10:35 AM   #9
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I may be getting Older, But I Refuse to grow Up I am Having to much Fun to Grow Up LOL
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Old 04-24-2011, 02:11 PM   #10
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Problem with this design is there not using a the true f-35 design. I applaude there work but I want a true F-35 when the nozzle points down and a hatch opens to reveal a fan behind the pilot for VTOL and I don't want to roll stabilization fans showing either. Yes I'm asking alot but if I do this I want to do it right. One issue I though of is how am I going to program the 3 extra fans?? Won't they all hve to be plugged into a throttle port and if so will I need 4 receivers??? Also how will I be able to the shut them off for forward flight. Any ideas? Also it was brought up about the lack of power from edf so could I do the garden hose trick and have the motor tube be a later size and jut shrink down the nozzle to get more thrust?
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