Avispad Build Log (Without Dihedral)

Started by vishalrao, August 17, 2012, 05:53:24 PM

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vishalrao

Here's my Avispad pics... Thanks to samlikespad and VC sir for the inspiration.

Modifications from original Avispad: No dihedral, rudder design, flat bottom airfoil (3mm ply for spar and 3mm skewers along the chord to stiffen base). Wing made from 2mm coro and fuse from 3mm coro.

AUW: 970gms

Motor: EMAX Grand Turbo GT2215/09 Outrunner

ESC: 30 Amps (with external BEC)

Battery: Nanotech 3S 2200 mah

Propeller: 9x6 (Hope to change to 10x5 before maiden)

Accessories: FY-30A Flight Stabilization System. Was lying around idle with me so though of putting it in this plane. Hopefully my 8 year old (already mastered the SIM) son will be able to handle it :)

Eagerly waiting for the maiden!

Update: Just realized that "My Avispad (Without Dihedral)" topic would have been more appropriate instead of "Build Log" as there is no build log as such. If the moderator feels so, please change the title.

atul_pg

Nice clean build..Do share your review of the FY-30 A Flight stabilization system later..

vishalrao

Sure Atul! I had used it before on my Sky Surfer but was not happy. It crashed while takeoff and landing  :) I hadn't discovered the exact reason but I think now that the gain in elevator was very high. Hopefully will have a positive experience this time as I really love the concept.

satz flying

Trust yourself

hyd_quads


VC

Growing old is mandatory, growing up is optional!

vishalrao

Quote from: satz flying on August 17, 2012, 06:06:11 PM
:goodjob:

how you decorated?

Stickers. You get stickers on square foot basis. Just cut the required shape and apply.

Thank you hyd_quads and VC sir!

BTW VC sir, did you get to maiden your Avispad?

Tushar.k7


samlikespad

Wow! neat and sweet build  :salute: ... video please  (:|~

rajsigma

Great build vishal, happy flying .........post video

vishalrao

Thank you Tushar, Sameer and Rajesh!

I do hope that this plane flies as good as it looks  8-)

BTW Sameer, where was the CG of your Avispad located?

samlikespad

As far as I remember, I balanced it on the spar.( And as per BEX, it was around 33% cord). Keep a bit heavy to the nose for the maiden and adjust to suite your flying later on. Good luck with the maiden!

VC

Vishal,

No I haven't maidened mine as yet. My CG is located at 1/3 Chord.

Your motor has a max amp rating of 28, you may do well to hike the ESC to at least 40, especially if you are thinking of putting on a 10" prop.

Beautiful build (I know I posted before - just can't help  (:|~) - looks like a shop bought RTF.
Growing old is mandatory, growing up is optional!

kamaraj74

i also made coro spad with dihedral wing the auw is around 950 grams can u tell the motor,prop,esc and battery specification

VC

Kamaraj any pictures of the model? That would help.
Growing old is mandatory, growing up is optional!

vishalrao

Thank you Sameer!

VC sir, I haven't tested the amps draw for the motor yet. I think it should be under 28 amps as 10x5 is the specified prop for the motor. Will check the amps draw now.

Kamaraj, please check the first post for my specification. I think it should be good enough.

Looks like I have to remove drishti from the plane before maidening it!  :giggle:

VC

There you go. Hang this from her tail landing gear as you maiden her.
Growing old is mandatory, growing up is optional!

vishalrao

Will be too heavy :) This would be more appropriate I guess...


rastsaurabh

Vishal, too good built.

can you give steps of making such flawless wing out of coro. main interest is...
> how to strenghten lower wing Base so that it does not curve
> how to give upper wing the required aerofoil shape.

Expecting answer soon. Thanks!!

vishalrao

Practice Saurabh. I have built some 4-5 wings before achieving this. The methodology is same as what you see on spadtothebone site. I have stiffened the bottom by gluing skewers (3mm toothpicks) along chord length at say 8 cm intervals. The best I think if you want to achieve a flat bottom wing is to use 3mm coro for the base. That way, the bottom won't bend when you fold the top.

Here are some tips I can give you to achieve a beautiful wing:

1. Crease and fold the wing top really well before gluing the spar. So that the top sits completely on the bottom (like paper fold). This way, you'll be easily able to fold the top without folding the bottom after you have glued the spar.

2. Shift the spar to say 35% of chord length and keep the height to 10% or less of the chord to be able to work easily. The taller the spar and closer it is to the leading edge, the difficult it is to fold the top.

3. Cut the wing top in to 2 (along the center) when folding. It becomes easier to work than folding the full span length.

rastsaurabh

Thanks Vishal,
Let me see what best i can do with the tips!!!

vishalrao

Maiden successful!!! Very stable. Just can't describe the joy. I guess I have to eat my own words. The joy of flying one's own creation in incomparable.

Videos coming soon. Don't expect much from the videos. Shot by my technically challenged wife :giggle:

samlikespad


vishalrao

#23
Here's the video link:


Conditions: Very windy.

Here's the second day video at the beach:


Conditions: Dead calm.

Have not removed the voices just to show the excitement!

Absolutely thrilled with this plane! Feel like throwing away all my RTF kits.

girishsarwal

Congratulations vishalrao. I love the landing strip without the mud pie of course (the first landing) :D
gs