Easy Formula for Engine Choice
Some months ago, I read some posts asking which engine would be appropriate for any described model. Of course there were answers, but nothing specific.
I was recently reviewing the performance of the 37 ARFs I built and re-built so far and found something interesting.
If I took the engine size, say a .46, moved the decimal to the right one digit, (4.6), then added .5, we have the number 5.1.
This is the maximum weight of the model in pounds, ready to fly, to be able to hover! (Depending on fuel & prop size)
It worked for all my engines, All TTs from .36 to 1.20, including a Magnum .91. Strange, doncha think?
Regards,
DGO