I
agree 100%... 2:1 and above P2W ratio is what a fella wants for rad 3D power.
BUT... I add cautiously, that we don't KNOW yet that the plane will come in at 16.5 lbs with a DA50 and therein lies the rub....
But yes... if the plane will, the DA50 will...
quote:
ORIGINAL: emnm79
[
Heck, even at ~31 lbs of thrust, its is pushing 1.9 : 1 A bigger motor is definitely overkill at the expense of wingloading...
imho, a really powerful 3d plane should be set up with near 2:1 thrust to weight ratio, as light as possible. And it sounds like the DA 50 is the ticket for that
I have some real life data for the Evolution 58. This video comes form MVVS Canada
http://www.mvvs-canada.com/images/Video/edgeVCD-1.wmv . It shows an MVVS 58 IRS turning a 26x10 Mejzlik prop at 5950 RPM. ThrustHP calculates this to come out at 47.16 Lbs. of thrust. If the Yak comes in at 18 Lbs. the thrust to weight ratio is a generous 2.62:1. Heck, even if it comes out at 20 Lbs. that’s still 2.36:1. If the Evolution performs the same as the MVVS I can live with the wingloading penalty. The video shows the MVVS pulling a 35% Edge 540 and I am sure that’s a 20 Lbs. plus plane.