ORIGINAL: Rcpilet
I'd much rather put HP on the firewall to make the plane balance. I will not use lead.
Why would you put a ST90 or a TH 75 on the firewall and then add 6 or 7oz of lead? Get a heavier engine.
How is that going to effect the way the plane flies? Same weight. Weather you put on a light engine and lead, or put on a heavier engine and no lead. Both combinations will weigh the same. But a heavier engine will at least pull it's own weight. Asking a lighter engine to pull it's own weight AND lead is not the best thing to do. Not to me, anyways.
It doesn't have to be a Saito engine. I know they are expensive. You can get a ST2300 for $150. GMS 120 for $130.
Put on a bigger engine to balance it and then use a 3-blade prop for cool factor. It is a warbird. An underpowered warbird will not be much fun, so I'd buy the big motor to balance it and then slap a 3-blade or 4-blade prop on it. High Speed Scrafing Runs [sm=thumbup.gif]
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Boy, talk about overpowered with the G2300. I love that engine, myself. The more you run them, the better they get. However, tripling (nearly) the recommended displacement (assuming .60 is the upper limit) is going to take some fancy piloting to keep it from rolling over due to torque when you goose it.
I'm with you. I'd rather carry more engine than extra lead weight, most of the time.
I've never ran an Evolution engine, so I'm still a little leary of them. I have seen some good reviews of them.