RC India

RC Models => Electric Planes => Topic started by: SideWinder on January 28, 2014, 10:03:29 AM

Title: Cardboard Delta Wing Help
Post by: SideWinder on January 28, 2014, 10:03:29 AM
(http://i.imgur.com/nWVH7Vi.jpg)

Its a simple crude build with stuff that were lying around.I just made this after watching a video also posted here somewhere, used the plan from http://www.rcgroups.com/forums/showthread.php?t=1252282 (http://www.rcgroups.com/forums/showthread.php?t=1252282) and reduced the size by 30%.

Now what I would like to know is what can be the max AUW for this wing?
Dimensions attached below.(in Cms)
Title: Re: Cardboard Delta Wing Help
Post by: rastsaurabh on January 28, 2014, 10:54:34 AM
Nice but y did u reduce the size ......except the cardboard frame nothing else is reduced.......equipment is heavy for it + motor seems to be small......what's thrust of motor with which prop.
Title: Re: Cardboard Delta Wing Help
Post by: iwincar on January 28, 2014, 11:22:23 AM
You shud have taped the c board dude
Title: Re: Cardboard Delta Wing Help
Post by: SideWinder on January 28, 2014, 11:43:37 AM
I just wanted something to fly in very tight spaces, so thought of reducing the size.
Right now the AUW is 220gms approx(yes its a little heavy), Im using 5*3 props right now with 1500mah 2s lipo. Thinking of reducing the battery size or increasing prop size.

The motor can produce

PROP - 6x4 E  200 - 250 gms Thrust
PROP - 7x3.5 SF  300 - 350 gms Thrust
PROP -  8x3.8 SF  650 - 700 gms Thrust

* http://www.rcbazaar.com/products/1944-avionic-m223015-kv1780-micro-brushless-motor.aspx (http://www.rcbazaar.com/products/1944-avionic-m223015-kv1780-micro-brushless-motor.aspx) *

@iwincar I was just trying the concept, I will try all the remaining stuff in my next build, have plenty of cardboard around  ;D
Title: Re: Cardboard Delta Wing Help
Post by: anwar on January 28, 2014, 11:54:01 AM
To know with some level of certainty, do a glide test on to the softest landing spot you can find. Any calculated values/inferences/results may be torpedoed by imperfections in the craft, which are unavoidable.

http://www.rcindia.org/search2/search=glide+test (http://www.rcindia.org/search2?search=glide+test)  (just in case).
Title: Re: Cardboard Delta Wing Help
Post by: Swapnil on January 28, 2014, 12:50:20 PM
1500 mAh seems a bit too much. Also, you shouldn't have reduced the wing area. It'll be difficult to handle in the air. Good try though.
Title: Re: Cardboard Delta Wing Help
Post by: SideWinder on January 29, 2014, 12:02:36 PM
Too bad it doesn't glide much, with all the electronics on there. But CG is correct so it maintains the attitude, but no glide.
Attached a pic illustrating the flight path during glide test.

So either need to loose weight or increase wing span, I guess.Or will over powering help as the motor can put out more thrust with a bigger prop.