Anyone know what a good thrust to weight ratio should be for this particular model?  I just did a simple calculation for static thrust for a Saito 4-Stroke FA-180 engine and I calculate about 16 - 17 pounds of static thrust.  I weighed all of my parts (I'm still building) and added in the weight of fuel and the engine, and I get about 17 pounds - which includes retracts, batteries, servos, etc.  This would give me about a 1:1 Thrust to Weight ratio.  You typcially find high T/W ratios on 3D flyers and not warbirds.  Anyone have some thoughts about the size engine I should buy?  I don't want something that is too large (both physical and performance), but I don't want to invest time and money on something that will barely do the job.</p>

I'm almost ready to install my engine - I want to beef up the mount as suggested in this thread - have a great weekend.  Good thing I'm not planning on flying this weekend - our Tucson monsoon season started really early!</p>

Thanks</p>

Bert</p>