LT-40 engine
 

Hey Club Saito Guys,
I was wondering if a FA-82 would be to much engine for my trusty old LT(kit built)?It has almost no dihedral(3/4"under one wingtip)is a taildragger and has flaps(oversize flaps and ailerons made out of 3"aileron stock).I figure the FA-65 weighs more than FA-82 so I would be saving some weight and gaining some HP.Win win right?
Any advise would helpful.
Thanks. Jim
Club Saito Member #509

RE: LT-40 engine
 

I had a highly modified LT-40 taildragger with no dihedral that I sold to a friend. He put a OS 70 fs in it and it flew great. Quite lively for a trainer. Not Saito, but a similar set up-hope this helps.

RE: LT-40 engine
 

The Saito .82 will be an excellent choice, you'll be at 1/3rd throttle most of the time but fuel lasts forever that way and when you want to hotrod, you can.

RE: LT-40 engine
 

Thanks yel914,Hobbsy,
thats what I wanted to hear.What prop would you suggest?I was thinking about using a MA 12-8 K prop for ground clearance,we fly off a rough dirt strip.Any thoughts?Wll thats about all I can think of to ask you guys.Thanks again for your replies

Jim

Club Saito Member #509

RE: LT-40 engine
 

BJ, a 12x8 three blade might be worth a look.

RE: LT-40 engine
 

Ok Hobbsy,
I'm going to try a12-8 three blade,but I was under the impression that three blade props were a not a good choice?

RE: LT-40 engine
 

I think we were using a 12-6 on that os 70 fs.

RE: LT-40 engine
 

At fourstroke and Diesel rpm there is no difference in the performance, I'll run a couple of 12x8 3 blades on my .82 today and give you some numbers.

RE: LT-40 engine
 

Thanks Hobbsy,
I'll check back later today right now I've got to go to work.
Thanks again for all your help.
Jim.
Club Saito #509

RE: LT-40 engine
 

Saito .82 GK
Plug==Saito SS
Fuel==WildCat Premium Extra with 15% nitro and 18% lube
TurboHeader Muffler/baffle
Master Airscrew 12x8-3 blade rpm==9,600
Graupner 12x8-3 blade rpm======9,650
Idle==1,965 for both.

These numbers are 1 click rich from peak.

RE: LT-40 engine
 

I've run several engines on my LT-40, and the Saito .50 (yes, a .50) was just about the best. That plane would putt around all day. The .82 is a lot, but that's what the left stick is for. I've often found that more engne (and weight) isn't always better. The .82 is plenty of engine, but it may just add more weight.

RE: LT-40 engine
 

It's not like an LT-40 can't handle a couple extra ounces of weight. They float.

RE: LT-40 engine
 

Hey Guys

Thanks for all your input I think the 82 will work out fine.I don't think weight will be to much to worry about,the FA-56 that I have in my LT-40 arf weighs 410 grams. The original engine that I had on this plane,a kit built LT-40,was a FA-65 it weighs in at 550 grams,and the FA-82 weighs 462 grams.I don't know why but my LT came out tail heavy,and when I put the 82 on the nose it needed quite a bit of nose weight to balance.I ended putting a 4200mah 4.8v reciever pack in the nose to finally get it to balance.I will probably fly her later this week with the 82 on the nose not much time for flying this weekend(Mom&Mother inlaw day).I'll keep you guys posted again thanks for your help.

Jim
Club Saito Member #509

RE: LT-40 engine
 

hey bj;
.82 will be very nice. i have flown my lt-40 with a .46 2 stroke, an enya .90 4-stroke, and an o.s.7o 4-stroke. after a few hundred flights and a rebuild as a tail dragger, flown with a saito .90 a supertigre .90, both glow and the gas conversion, and now with an os pumped .91 4-stroke. you may notice i favor the 4-strokes, as they match engine torque and prop speed better to the speed of the model. our field altitude is 6002 feet. hope this helps you.