While I would personally never do it, I have seen people use this receiver in large glow powered planes and they've had no trouble yet that I know of. Now, just because people have done it doesn't necessarily make it a good idea. Even if it does work, which it very well might, let's say something happens and your plane crashes full speed into someone. Even if the receiver wasn't at fault, how would it look if it was discovered you had a receiver labeled for park flyers in a much larger plane? That could come back to haunt you. I figure that Spektrum makes two styles of receivers for a reason.

With your Arrow you can use the less expensive AR6200 receiver which is full range, DSM2:

http://www.horizonhobby.com/Products...odID=SPMAR6200

I've actually found some good deals on Spektrum receivers on eBay. There are several reputable sellers offering free shipping. Just be careful that the seller has a good reputation and is hopefully an authorized dealer in case you have any problems.

I would hang onto that AR6100e. You never know when you might decide to buy a small electric.