Hey Mike,

I agree with you on considering throttle precision as very important factor. For that reason any servo with a very narrow dead bandwidth (i.e. 1 microsecond versus 8 microseconds) will be adequate. You can get that type of servo resolution from any good digital micro servo like an HS-5245MG that sell for about $48 bucks a pop, and only weights 32 grams.

On the other hand most gas engines are equipped with industrial type Walbro carburetors which are notoriously known for having extremely poor throttle response curve . Usually they accelerate 50% on the first quarter stick input, and will be running at 80% power at half stick input. Remember that they are designed to work on a power tool that's going to run either at low idle or full bore, so they don't need a nice linear throttle response.

In my humble opinion I rather spend the money in a good computer radio than expensive servos. Most top of the line computer radios will have a program to adjust the throttle linearity and apply curve exponential to smooth out the transition and even provide for two switch activated user controlled throttle curves ( i.e. one for normal maneuvers and a second one weighted around the engine best thrust for hovering, torque rolls, etc.). So to keep cost to a minimum I rather use the cheapest, fastest servos available, and the best available computer radio. Now………….if my hobby bank account was unlimited you can bet I’ll be flying with all the latest bling.

By the way I also agree with you that on a 30% plane the weight advantage will be negligible. Taking in consideration the much lighter wing loading of a 30 pound plane a few grams won't make a BIG difference. In any case in my experience one thing I know for sure Lighter Planes Fly Better and when you are flying with low surface areas every gram counts.

Say hi to the guys up in Converse if you get to see them and please email me a copy of the latest roster which I need for the AMA club charter renewal,

PS: Go [link=http://wyliewarbirds.com/video/bwh540/bwh540.wmv]HERE[/link] for a short video of the baby Edge fellow club member Terry Farmer from Wylie TX. shot Sunday afternoon. If you like check his web site at [link=http://wyliewarbirds.com]wyliewarbirds.com[/link] there are lots of videos shot at the Richardson RC Club field in beatiful Lake Lavon TX.