I'm putting the Seagull Decathlon together right now.

RX--Hitec 555
Switch--Hobbico Heavy Duty
Battery--Hydrimax 1650mah 6V
Engine--TH .75 mounted sideways with Bisson pitts muffler--yeah, it'll stick out of the cowl a teeny bit

Plane specs:
68" wing
760sq. in.
7--8 pounds RTF

I won a bunch of Hitec servos in a big raffle, so I'm gonna use them. As much as I've cussed the 6XX Hitecs in the past, and sworn off their servos, I can't help but use these 4XX servos in the plane I've got.

I've got:
12 Hitec 475BB
10 Hitec 425BB
6 Hitec HS81

The plane is setup for dual elevator servos and dual ailerons servos. Single rudder and throttle servos.

I'm going to mount an HS81 to my engine mount and run a short 3" rod to the throttle arm.

But, I'm unsure what servos to use for the rest of it.

I thought that a 475BB would be a wise choice for the rudder. It's going to be pushing 75oz at 6V.

What do you think? 425BB in the ailerons and 475BB on the elevators and rudder? Or just use either servo on the entire plane and forget about it?

Thanks

If these servos work--we might just have a convert/turncoat on our hands folks[X(]

at least the 475 on the rudder. can't remember the torque on the 425's.
the decathlon looks good for the cash, right. I checked one out at the LHS.
your putting a .75 on it? My ST .61 with a bisson pitts might have a new home. Let us know how it flys when you get it done.

for what it is worth, i had a 40 size decathlon with all standard servo and it flew fine. awesome snaps.

It's a great looking plane and about 90% complete out of the box.

I replaced the tailwheel with a sillivan unit.

The 425BB should be pushing about 60oz at 6V.

Keep in mind that I'm using the .75 because I'm flying in Pueblo at about 4200' elevation. I expect brisk performance--but it's not gonna be a hover monster at 8 pounds. Not even close.

The TH .75 is good for about 6.5 pounds if you want a hover monster that will rocket out and accelerate going up. This 8 pound airframe should fly very nice with my usuall Pro Zinger 13-5 prop and Omega 5% fuel. I may try a 13-6. I've run 25% through this engine before--and you can DEFINETLY see the difference in performance. But--I don't want to cook the engine or wear it out prematurely--so 5% is cheap and works well. Very dependable and reliable setup with 5% and some castor.

Decathlons aren't meant to hover anyway. It should fly with plenty of authority, and pull nice big loops, but I'm not expecting a Decathlon that will torque roll.[:-]

I do plan to fly it hard--so I'm going to put the 475BB on all the surfaces.

no good for hovering, but it's nice to have great vertical.