Hi everyone,

I built a battle axe a year or so ago, and flew it quite a bit. I'm at high altitude, so with the OS .15la, i was pretty much full throttle constantly, just trying to keep it going forward. I think the poor old thing is beat. The compression is just about gone.

I'm looking at engine choices, and the os .25 la is the same same mounting dimensions. I dont know if it will keep me out of ssc classes, but i only fly it for fun anyway. Would something like that be good power for my ssc battle axe airframe? It looks like the .25 might be more weight than power. Or do i need to find something else? thanks guys.

Alex, thanks for making such a good plane.

Hey whats happening? I still have some super tiger .29's if you are interested in that. Better than an LA but not quite a .25 FX. PM me if you are interested and we could work out a deal.


Rich Love-air R\C

Trey,

At moderate elevations the .15LA is plenty of power. However at higher elevations (5000 ft), the engine doesn't produce quite enough power in the thin air.

Here's a message that Eric sent me. He also flies his battle Axe around 5000' ASL.

"Alex,

Great news...I shoehorned the .25LA on to the SSC and she flies GREAT ! Much better at this altitude. It seemed pretty nose heavy so I raised the ailerons two turns on the clevis (shortened them) before flying and left the elevator neutral - perfect launch - perfect trim !"

Although the .25LA won't be legal for an SSC meet, you can put the .15LA back on if you go to an official contest. Also, at moderate elevations I wouldn't recommend the .25, as the .15LA will be plenty of power and is what the SSC version of the AXE is designed for.

Trey,

If you have other questions, we just launched a brand new Battle Axe [link=http://www.treneffrc.com/support_forum/default.asp]Support Forum[/link]. Of course I'll still check here and provide responses here, but hopefully the forum will allow us to get a lot of the information grouped in one place.

While the 15LA makes pretty decent power for a .15, the .25LA is definitely a weakling among 25s. Still, it will give you much better performance than a 15! Take the muffler baffle out, use a 10x4MA prop, and your speed will be a bit faster than a good-running 15, but you will have tons more thrust for launch, climbs, and continuous turns.

The 25LA does not have the same mounting dims as the 15, the case is wider and the mounting hole spacing is different.

Though it's a weakling, the 25LA is a nice running engine. For a little more than the 25LA you could get an FX which has gobs more power and is about the smoothest, sweetest-running engine of any size, it's a real user-friendly engine. Another choice is the Magnum 28XL, which is much more powerful than the 25LA, but not as smooth and user-friendly as the FX. Magnum has raised their prices and now the 28XL is not much cheaper than the FX, for the money, I'd go with an FX over a 28XL, but if you find a good deal on one, the 28XL is a decent engine. It does vibrate a bit and the carb bits tend to get loose and fall off, so make sure they are kept snug.

I'd avoid the TT PRO 25 and the Magnum 25XL, although they are ball bearing engines, they are relatively gutless and not much stronger than a 25LA, while being heavier.

You may want to consider the Magnum 15. It runs quite well at our altitude

r