A few rebuttals to Bill R's reply...
The O360 is 17 pounds heavier than the O320, and delivers 20 more horsepower per nameplate - a significant horsepower/weight improvement, there is no other single modification you can do to the airplane that will give you this much reward for so little weight gain. With a constant speed prop of standard design, the tail-heavy margin disappears quickly, especially if you choose to install some of the popular modifications such as the Anti-Splat nose-gear mod, an optional backup alternator, oil separator, etc etc.
Vans baffles are still needed as he points out, unless you want to go the plenum route - which is more efficient if done correctly, but adds about 1 pound up front over the baffles (my aircraft, I have not audited others).
And finally - the CG is entirely within your control. You have to carry all the items you select to install, but you get to choose where you carry them. My battery is aft of the baggage compartment as are all my remote avionics - because I am heavy up front with items I deemed "necessary or desirable". My CG works out just fine without ballast anywhere.
Lightness is always a good thing - but you can move equipment around to carry what you want where you want it.
Greg Niehues - VAF 2017 dues paid
Garden City, TX
N16GN flying! http://websites.expercraft.com/airguy/
Built an off-plan 9A with too much fuel and too much HP. Should drop dead any minute now.
Last edited by airguy : 09-23-2017 at 09:23 PM.