Originally posted by Dazzler_BE
The FX.46 does weight 4oz more than the LA.46 Hope that's not a problem ?
Anyway, I will still have to start contruction, so I'm not flying it for the next couple of weeks.
Please keep me posted on any experience with the FX.46
I currently have one in my Easy Sport, I could always try it, but I don't like to swap/build over engines
Is a 11x5 of 12x4 prop not better for vertical performance compared to the 11x7 ? I was always told that higher pitch increased top speed at level flight, but lower pitch increased thrust (in vertical or manouvers)
Yes, a 11x5 or 12x4 will be better for vertical. Lower pitch does not increase thrust, but your engine will be able to turn the same diameter prop with a lower pitch faster than one with a higher pitch. The higher rpm at the same diameter is where you get your higher thrust. Also, if you increase diameter and can spin the prop at close to the same rpms, ie 12x4, you will increase thrust.
You might think about going to a smaller load prop on your trainer as well. A 11x5 on your trainer would definitely improve your hammerhead.
You would most likely also see an improvement in throttle response, which is very nice to have to get out of bad situations while you are learning.
Good luck.
bsc