Thanks Sam!

I gave it the works. Squirted hot glue at the spar joint, held it down at the dihedral angle. After it had set, I sealed the cut that I had made on the wing chord with hot glue again. Anyway, now with epoxy and wooden braces, it is way stronger.

VC, two things I noticed about the wings from the pics:

1: The LE seems to be very blunt! You could have easily created a nice curve there. I think you added an extra score line and it bent from there. Next time, you could use a long ruler or aluminium flat piece  close to the LE to pin/hold the bottom piece to the ground while you curve the upper piece and glue. Hold it using weights ( I use tables or chairs and some times I ask my little ones to sit on the chair ) on both ends of the wing until the glue dries.
2: The TE seems like glued with hotglue/epoxy. Hot glue might not hold and either one of them could add a lot of weight. CA can do the job if you clean/sand the surface and apply moderately.

1. That is a smashing idea and I must try that on my next build. Unfortunately, I don't have any little ones - just one big monster who is my helping hand when it comes to building. She knows her ESC's and Prop Dias and is invaluable when it comes to things like soldering. Just showing off, a proud Dad after all.

2. The T.E. has been joined with C.A. I just wanted some added strength so was trying to weld the coro.

As per your advice, I am way below the ideal A.U.W. of 1.2 - 1.5 kgs. At the moment I am maxing out at about a Kg, therefore taking my chances with additional reinforcements.

Trying to build an ugly plane that I won't be too scared of crashing. After all, SPADs die hard!

Your observations / comments are a GREAT help, please continue as I post.

Indeed nice to have a helping hand VC, the blunt LE bothers me may be our forum heroes can enlighten us on that part). By the way, what is the power setup you intend to use?

Shooting it back to you - what is your opinion of the CF 2822 motor @ 1250 Kv spinning a 8 X 4 prop? Good enough? Or else a 900 Kv with a 9 X 5 prop?

Master you have me worried about the LE now  . Let me see if I can rectify it or else I'll just take my chances. Have seen worse flying beautifully.............

Vc sir , just a small suggestion.
bend a cycle spoke according to the dihederal angle ( 2 spokes ) put one above the wing and other at the botom.
pass it through the white flutes ( the joiner at junction of wings ). and just hot glue it.
This will help the wing to stay in its dihederal shape, and if the wing collapse also. it will hold it due to the tension of the wire.
and will not add much weight.

manoj

Thanks Manoj. Have tried that technique on my earlier Coro builds and it worked very well. This time I did not want to deviate from the techniques suggested by the designer Bex.

Quote from: VC on July 08, 2012, 01:10:32 PM
Shooting it back to you - what is your opinion of the CF 2822 motor @ 1250 Kv spinning a 8 X 4 prop? Good enough? Or else a 900 Kv with a 9 X 5 prop?

VC bhai, that might be a bit under powered and you might end up fighting to balance the plane. I have the bad habit of over powering my planes and last time I remember putting a 3542 1450kv on it   IMHO a 2826 should be a better option. Its a 3 pound plane and you need some thing like 300W (or plus   ) for decent performance.

Thanks, I have a 1500 kv DYS (250 watts) sitting around somewhere. If I can keep the weight to 1 Kg, that should suffice.

These calculations are based on over estimation of weights:

Basic airframe : less than 450 grams - ACTUAL.
Battery (2200mAh 3S) : 190
Motor : 60 grams (if I choose a heavy motor)
Esc : 30 gms
Rx : 15 gms
3 X 9 gm servos = 30 gms
Landing gear = 100 gms (heavy!!!) Giggle

Other accessories = 100 gms (motor mount, push rods, servo horns etc)

AUW is still under a Kg. (975 grams)

Wow VC, thats an amazing AUW   But keep an eye on the balancing part.

Wilco! That's why I took the liberty of strengthening the fuselage with additional bulkheads made out of high density thermocole.

Interesting!  

I have sent 2 PM's to the honourable Administrator to rename this thread as the "Avispad Build Log". He must have missed them. However, construction continues, more pictures soon. Please bear with me.

All changed but the last as that you can, VC sir the Grate. Just Modify.
And I suggest APC Prop with 2826 motor
http://hobbysea.com/products.php?18&cPath=14&sid=05ef41b8ced06d6cf1b0b39876c78aa4
320 watt.
You can get unlimited vertical even for 1.5 kg too. with prop adapter (Not prop saver and best suited for APC Prop) And low cost too

But surely you have similar one

VC
great going!! could you add just enough coro to the foam consignment so that i can give it a go ?

Thanks Kalyan. I have the same motor, however, will a 7X4 prop generate enough wash for this model?

Wilco Sir. One sheet of 6' X 4' Coro added.

An APC or APC style HK 8x4 with this motor is a good combo IMO while a 7x4 would do for a less than a kilo trainer. We want pictures

Hi VC

Excellent build from you (as always).  As far as the CF2822 motor is concerned it will definitely be underpowered. I used the same motor with a 9x4.7 and 10x4.7 on my TB-20. The static thrust values were 600 grms and 730 grms respectively. So avoid that motor for the avispad.

All the best for the rest of the build and maiden. Subscribed. Paint her a beauty like your boats.

Regards
Ankur

Thanks Guys. I'm really in a dilemma with the powerplant now. CF2822 (1250Kv)can accommodate a bigger prop with a smaller ESc, but the 2826 (2200 Kv) can only take a smaller prop with a much bigger ESC. AUW is going to be just about a kg, and I want to get the power right the first time.

Your avispad is going to be a slow flyer. You should go with the lesser KV brushless you will get better control over its flying. Go with larger prop and 1250 KV.

Though if you are planning on loops and some aeros you should go in for 2836 same KV.

Sandy, too much of stuff stockpiled and forgotten at the time of need. Just found this motor in my collection, thereby adding another possible combination. Now tell me:

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8622

VC, It might barely get the plane up if you could keep the AUW say just about 800 to 900g. It still is very under powered. 2826 is much suited (though I had a lower kv in mind) and you have one lying around. You could change it with a lower kv motor once you have one. Just my opinion

VC
2826-2200 kv in spad, motor will overheat (Due to high drag and low forward speed), this is more of a radjet/ scratch built fighter motor.high KV high draw for same watt, for spad ? you are win win with low kv

Aye Aye Cap'n! Now do you think I should give the 900Kv a shot?

Hi VC,

Nice build thread. Please post pictures of the model. I am sure its going to be a great flyer.

BTW, as everyone suggested this will be a slow flyer. So, go for a low KV motor on this one.

-Ismail