Hangar 9 Arrow Trainer
 

Hello everyone

I just got a Hanger 9 Arrow trainer ARF kit and need an engine for it. The box says it can use .36 - .46 (2-stroke), .45 - .72 (4-stroke). I was thinking of going with a four cycle but I wonder how it will fly with the smaller size it indicates? Was told the .72 is way too big for it and was recomended a .56 or .62. Can the four cycles do the rolls and loops without oil issues or should I stay with the two cycle? Say a nice .40 or .46 from enya or os. If you had one of these planes what did you use and how did it fly?

Thanks for you help in this.

TF

RE: Hangar 9 Arrow Trainer
 

I flew mine with a Magnum 46 2S, with good vertical performance and the ability to do just about any aerobatics, short of 3D, that you might want. I put a Magnum 72 4S on it just to see the difference, and felt it was underpowered (although it did land slower, probably due to the larger prop). A friend at the field also has one with an OS46, and he's happy.

My personal opinion is that you'd be better served with a 2S.

RE: Hangar 9 Arrow Trainer
 

I would use a OS 46 ax ..That is a 2 cycle and if you are not very farmilliar with glow engines it might be easier to start with a two cycle...The OS 46 is a real user friendly engine...It is easy on fuel , quiet , easy to tune, quick to break in and has lots of power...You will get lots of opinions on this and thats okay...If you get any inputt from John Buckner or Grey Beard it is usually solid and worth listening too in my opinion...

RE: Hangar 9 Arrow Trainer
 

No the .72 4S is not too large for this plane.

Yes it will do rolls and loops without any "oil issues".

That said, an OS .46 AX may be slightly more powerful. Also the 2S is easier to tune for a novice, as you can listen for tuning differences in the engine pitch.

With a 4S you need a bit more experience and it helps to have a tach.

Other than that, you can do either.

With proper prop sizing you can make either engine perform about the same way since they are somewhat similiar in power.

If you want a faster flying plane, use a 2S or increase the pitch on the 4S with a slightly smaller prop.

If you want 3D like "prop hangs" use a low pitch wide prop ( e.g. 13x4w ) on the AX or 4S engine.


I really don't see a lot of difference between the AX .46 and the .72 magnum on this plane provided you adjust the props accordingly, but I do rate the AX as being the more powerful of the two.

Fuel use is about the same too.