I've been contemplating building the Avispad. It seems to be a great flyer. I was nitpicking and got stuck on a few 'missing' measurements. I know I could have taken the easier way out by taking short cuts, after all, the others who have built this model - successfully produced great flyers.

My apologies to the original designer/s, I hope I am NOT infringing on any copyrights.

Anyway, here are my two penny bits of 'rectifications' and I hope this helps all concerned.

These plans remain unchanged.

I know these minor clarifications won't make a difference to an already proven design, but then, what the hell - it may help another nitpicking individual when he decides to build this model.........

That was real nice of you VC   I have built and helped many but never thought about doing this! Well done and for sure this will help any one who wants to build this great trainer!

Thanks Sam. I would request others who have built the Avispad to comment if these measurements are correct or do we need to make any further alterations as I am about to start cutting today.

Thanks and Regards.

   looking forward to a great beginner model detailed build log with pictures and videos, following this thread for my own build....

Krish, Ved, Ritz, Sam -

What is the AUW (Airframe + Motor + Prop+ RX + Battery + ESC + Servos + Push Rods + Wheels = EVERYTHING!) of your model?

Cheers!

VC, in my case they were 1.2kg with a Turnigy 3542 1450kv motor (which was an overkill), 60A plush esc (again an over kill), Turnigy 2200 3S 20C and mini sized HK servos. I could have gone way low if I had the right motor/esc to mount.

Thanks a ton Sam! In your opinion, what should be the ideal AUW? Also please suggest a motor + Prop combo. How would the 1250 Kv CF 2822 do with a 8X4 prop?

As per the designer I think its 1.2 to 1.3kg. And it was very floaty within that weight range.

Build in progress. Not getting enough confidence to cut a notch on the completed wing / wing spar and squirting hot glue into it to create the required dihedral. I have built the wing as a single piece and don't want to ruin it. Any suggestions?

You could sandwich the center with lite ply pieces. And VC, if its for you, do you really need a dihedral since it floats pretty good, having low rates and some expo is all that needed to get this to behave good. I tried a semi symmetrical straight wing and loved it!

Edit: Oh sorry, I think I missed some thing. You already have the wing built as one piece. In that case I dont know whether you could use some thing like a lite ply piece to strengthen the spar center

Sam my saviour.

I too have accidentally created semi symmetrical wings. Aimed at a flat bottom though! I am a novice flyer and would prefer a dihedral. Should I try this technique, will it hold? I fear it may unfold in flight. However, since this has been uploaded by the designer, it should be practical, what say? I just don't have his (Bex's) confidence.

I miss Izmile.


Photos courtesy (and my personal gratitude to them) www.spadworld.net and http://bexspadgroup.blogspot.in/ and www.rcgroups.com

http://spadworld.net/forum/viewtopic.php?t=15648&postdays=0&postorder=asc&start=0

http://bexspadgroup.blogspot.in/2008/07/avispad-build.html

http://www.rcgroups.com/forums/showthread.php?t=893170

I have tried Bex's method and back in Kottayam I once had a wing fold mid air (was bit windy). Some how I managed to land it without much damage. Any how, the way I do it is to put either lite ply or an additional piece of 4mm coro on both sides to sandwich the spar at the middle. Since the AUW of this bird is so low, this should hold. Please dont forget to double the spar at the middle for additional strength. If you have enough width at the middle of the spar, you could try Bex's method by cutting a little in the middle and filling it with hot glue. However, I always make sure to use additional pieces of either lite ply or coro as doublers.

Now that the wing is ready and glued in a piece, adding additional reinforcement is going to be pain. Anyway, thanks for your help and encouragement at this hour. God bless.

Lets hope for the best and good luck with the build. Kindly post pics and videos.

In the past, I have posted some build threads only after the model was completed. This time I've decided to go with an actual build process while the model is still under construction and I will try to keep updating this thread till I maiden her.

I am trying to post a detailed build log, I hope others find it useful. Wouldn't want to bore people with a rambling narration as the pictures should be self explanatory. However, I would welcome any queries / questions about specific steps.

All construction from 3 mm (white)and 4 mm (yellow) coro.

Here goes.

Must thank Krish,Ved, Ritz, Sam and all the others who inspired me to build this baby. Thanks Guys  !

Could the Admin Team please change the title of this thread to Avispad Plans and Build Log?

Thanks.

A failed attempt at trying to create a wing dihedral using hot glue. I wasn't confident about it. Perhaps I needed a different grade of glue stick. In hindsight, I am fortunate that this didn't work out. It would have probably collapsed in mid flight.

Squirted Hot Glue (ugly job) and let it set for the night. This morning when I gave it a stress test, it just gave way. Had the wing wrap reinforcement been in place, maybe it would have held.

So  now the only option left was to cut out a window and use additional reinforcement (soft yet strong Chinese decorative wooden beats - available in Furniture manufacturing units) made out of wood on either side of the coro spar. This time I used Epoxy - Fevitite Rapid. Bingo!

Again created the dihedral by placing a 3" piece of thermocole below the right wing tip and laying the left wing flat on the floor weighted down with bricks. Also applied a generous layer of Epoxy to the 'v' formed  on the top surface of the wing joint line, caused by the dihedral.

Turtle Deck and Wing Wrap.

Attaching the wing wrap (4" wide with flutes running span wise) starting from mid section of wing bottom and continuing to the bottom trailing edge - upwards to the wing upper trailing edge - to the upper leading edge - back down to meet at the mid section under the wing. Confusing? Just check the photos........

Good going VC !!! About the wing giving way, you are supposed to squirt hotglue only at the v joint of the spar: not on the whole cord! Once you have the spar done, a wing wrap is what should hold every thing together. Anyway, glad you have sorted it out already. Well done!