54" Kyosho Sukhoi

Bought one 2nd hand unflown-but bare bones. Now fitted out with a new motor box with a 5055/06/580 low Kv motor to run 5000/30C 6S, Hobbywing Platinum 80A ESC. 4 dirty great Hi-tec metal gear servos that should keep it pointing in the right direction.
Just left it Pauls for him to wire it all up for me (my soldering skills are legendary for their resmblance to a Jackson Pollack) install a 7.5A BEC with a 1Ah 3 cell li-po & Spektrum 5ch rx.
Paul has forwarded a motor calc (Castle Creations) via e-mail to me & from it worked out a 12x6 prop should be a good starting point (I've also ordered a 13x6 which I should get the next couple of days) It should have bags of power-but with an all up weight of just under 7lbs (guesstimate) it'll need it! (bit of a fatty )
I'm hoping for a figure of about 150W/lb with about 6-7min average flight.
Maiden coming soon!

hi ade have u had the meter on the motor yet, whats the watts & amps are u getting?ps post some pictures as it probably gunna be a while before we,re out again

Sounds like a cool new project, she is a heavy lady, yes we need pics

Been on this most of today
poor quality pic, just to give an idea of the model
also a datalog from a quick spin up .......
too much vibration atm ,although the prop. is balanced so not Full rpm.

Ade you may need a proper prop. adaptor
and I will need to reverse the motor shaft

Power will not be an issue with this model
(Yes. thats 1200Watts so far )

hi ade have u bought or did u make the motor mount,is it a ply box.

Motor box made for me by the man I bought it off, he's a master builder this box is better made than the rest of the plane!
Pauls run into a slight technical hitch with the motor-its too bloody powerfull!
Half throttle is 1200W/50A. Going to try it on 4 cells & see if we can get the power down to something like sensible, if that doesnt work will have to try & get a lower Kv motor (about 400) for it.

See sometimes size isn`t everything .......................... Biggers not always better............................ i keep telling myself that anyway

I think you meant to say thats what you keep telling the wife lol
HAHA

But it matters bigger IS better-ask your lass!

No she prefers girth Especially when it comes to my wallet

Borrowed some 4 S 2200mah packs
from Mike W.

Prop. is a 12 x6"
running around 540W now

A 13x6,13x7 or 14x6" should get me to around the power levels needed
on 4S.



[img][/img]

Further testing today
Best was the 13x7" prop. on 4S giving 722W 47.24A
Right in the ballpark

All we need is a bit of half decent weather for a maiden. I'm off work Thursday & Sunday next week. Mind you it may be Spring before I get this craft gets up in the air if the weather stays like this

See Pogo thread re-batts. MMMM I can feel the Spring coming