Is this a good combo, will the engine have enough power?
Joe

Yes, Plenty.

I've had experience with several LT-40's. Great trainer/flyer! Yes, the OS 40 FX will be plenty of power. The OS 40 LA and the older FP engines are kinda weak though. Hope this helps.

Thanks for the replies, I just bought a brand new .40FX and a LT-40 kit , since I like to build, I was hopeing that this combination was adequet. I'm back to building, and flying soon, after a 15 year layoff from the hobby, I'ved been on this site awhile gathering all the information I can get, it seems that the LT-40 is a good choice for a trainer.
Joe

An excellent choice for a trainer. Many at our club have learned on them, with lots of engines. OS40Fp, & FX, one tried a 40LA but soon changed to a 46LA, TT46 and another I don't remember.
Dennis-

I feel better in my investment, now I just need to get a good computer radio so that I can use it in future models.
Thanks Joe

Joe
Great choice , Now a Hi tech EL. radio and you have it made.

I am flying the LT-40 with a .40LA and a 11X6 prop (for Break in). While I plan on moving up to a .46FX once I gain some confidence, the .40 has plenty of power for a beginner pilot. IMHO

I have my radio choice narrowed down, I don't want to mention it cause it might start a radio war

I doubt you'd start a radio war. Yeah, there are a lot of opionions, but it's not a huge deal one way or the other.

Actually, the one recommendation I'd make is check with your local instructors and make sure they have a buddy box that will work with your radio set. I happen to fly mostly JR, and I appear to be the only instructor at my club with a JR trainer cord, everyone else has Futaba.

I also have a Polk radio that doesn't have a trainer function, and a Tower/futaba system.

Hitech can work with Futaba, but I've heard that there are some issues with weither it's a Futaba or Hitech cord connecting the two transmitters when you mix them. Haven't done it myself though.

Yea, I know, I'm waiting to check out some of the local clubs to see what they are flying on before I make a purchase.
Joe

I'll second that. Probably the best out there. I put an Irvine .39 in mine. Power is more than adequate...

Good choice. I was given the LT40 kit as gift. Put .46 Fx in and learned to fly. After first wreck put an old OS 32 Fabc in it and could hardly tell the difference in performance. Good luck

Mine must have over a hundred flights on it and it's still going strong. I fly it every once in a while just to have a change in pace and have some fun with it.
OS .46 still running strong a good combination.

YS 63 on Lt40. Plenty of power. Saved my plane several times. Full power up elevator. And away it went out of trouble.

Being a local pilot and flying at about 6000'-- I can say for sure that you don't have enough engine.

It's going to take at least a good 46 to fly your plane decent. An FX 46 or a TT Pro 46 would have been a better choice. You won't be able to do a loop with that engine. And if you get into trouble- you won't have the power you need to get out. If you need to abort a landing- then you might be in trouble.

Sorry to burst your bubble- but thats an honest answer from a guy who flies in Denver. Been flying for about 5 years now and I've seen plenty of underpowered trainers. Not pretty.

What hobby shop sold you that plane and engine combo?? You should try to exchange it for a bigger engine.

If you decide to keep the engine and fly with it; then be mindful of your airspeed on landing approaches. If you go to abort a landing- then power up and give it a chance to gain as much airspeed as possible before pulling back on the elevator. Keep your climb angle as low as possible or you will stall. You just don't have enough engine to horse the plane off the runway or make any sudden moves at low altitude.

Good luck

Rcpilet, where do you fly at, maybe we can meet sometime.
Joe

Whoa, I didn't notice your location, Joe. I've not flown at 6,000ft, but what Rcpilet is right on, you do need more power at altitude.

I flew once last year at a field that is about 1,500ft above my normal, and even that was noticeable. Not a big deal, but noticeable.

Ok, I'd better take the advice of the experienced, I don't want to loose a plane for being under powered, will a .46 FX do the trick?, and will my .40 FX work in another plane like the 4*40 at high altitude?. This will probably set me back a few months, but oh well, better learn it the right way.
Joe

I think the 46FX would be better suited to the 4*40, I definitely wouldn't go any less than that (at your altitude). A Great Planes Super Sportster 40 built from a kit is very light.....the .40FX might work on that....maybe RCpilet has experience with this combo at your altitude?

Hi Joe, If your going to keep the 40, go ahead and use it. It may do fine with something like an APC 11X4. Then if you get a 46FX it will bolt up in the same holes. I have a nice used OS46FX for $80 shipped. If your interested, you can e-mail me for details. If your a Super Tigre fan I also have a "NEW" 51 ringed for $95 shipped.
Fred [email protected]

Fredscz, thanks for the offer, but my plane budget is busted right now.
Joe

Hi Joe,

You probably should find a way to get a .46. I am flying an LT-40 with a Magnum .46 near Fort Collins and on a hot day (high density altitude) the climb performance is okay, but not great.

I think on cool days the .40 would be okay, but you might be happier with the extra power in the end.

Good luck. I'm really enjoying my airplane so far.

I'll get the .46, right now I need to build the plane, the left wing is on the building bench as I write this, so, any plane sudgestions for the .40FX?
Joe

Joe,

I was flying my LT-40 with the Magnum .46 today (about 80 degrees F) and really it flew with plenty of power to spare. I asked around the last couple of days and apparently a lot of guys do fly the LT-40 with a .40 engine.

So, do what you think is best. The 40 would probably provide adequate, if not overwhelming, performance.