| Weight isn’t the most important factor, especially in the case of these old biplanes, what really “soaks up the power” is drag.
Obviously the wing has to produce enough lift to overcome the effects of gravity or you end up with a RC car but once again with biplanes there’s loads of wing area so that’s not usually a problem. All the flying wires, interplane struts and dummy guns etc. soon add copious amounts of drag but without the use of a wind tunnel it’s pretty much guess work.
As an example, using a Laser 70, my 62” span Elf flies quite happily on ¼ throttle but my 54” span Albatros DVa certainly wasn’t overpowered and both models are about the same weight.
All I can say is that if you’ve gone to town on the scale additions, in my opinion the power may well be marginal, especially if it’s an OS 25 Four Stroke. |