Dirt Doctor
50cc
Does the 30 x 13 slow down for landing? Also, how about downlines - will the plane slow down?
IMAC new to me dalton 260/300, just want to fly it!!!
- Thread starter orthobird
- Start date
Bunky.F.Knuckle
150cc
Slows down just fine on my buds Yak.
Dirt Doctor
50cc
Thanks Bunky, soon I will have my Carden Pro ready to fly. I have both a 30 x 13L and a 31 x 12EVOL - I will find out which one will work for me!
Flatspinjim
50cc
31 x 12 works better on mine. DA 170 on re3's. Mine didn't slow down very well with the 30 x 13. Plane is light though at 36 1/2 pounds.
Dirt Doctor
50cc
I have a DA 170 and MTW 110 canisters. I think that I will try the 31 x 12EVOL first!
WOW, is all i can say. big difference.
yesterday, with the
TBM wood prop 32 x 10, max RPM was 4600
today, with the Falcon CF 30 x 13 W, top RPM was 5600.
huge increase, and the pull was just amazing. i felt it way much more this time compared to yesterday. with what it has now, i feel this airplane can take off no problem,. yesterday, i had my doubts as it felt weak. It is alive now!!! the spool up was faster than yesterday, but still sluggish.
i can only imagine spool up will be better and top RPM will be higher with the Mejzlik 30 x 12 L
yesterday, with the
TBM wood prop 32 x 10, max RPM was 4600
today, with the Falcon CF 30 x 13 W, top RPM was 5600.
huge increase, and the pull was just amazing. i felt it way much more this time compared to yesterday. with what it has now, i feel this airplane can take off no problem,. yesterday, i had my doubts as it felt weak. It is alive now!!! the spool up was faster than yesterday, but still sluggish.
i can only imagine spool up will be better and top RPM will be higher with the Mejzlik 30 x 12 L
using this:
http://adamone.rchomepage.com/calc_thrust.htm
i get this:
TBM 32 x 10 wood prop @ 4600 rpm = 41 lbs static thrust
Falcon CF 30 x 13 W @ 5600 rpm = 66 pounds static thrust
if
the Falcon CF 30 x 12 L gets 6000 rpm, then static thrust would be = 71 pounds static thrust
i do not know how accurate this calculator is, but at least it will give me a rough idea on the change in thrust by changing the props!!
anyone think this motor can reach 6000 rpm with the 30 x 12 L CF prop????
http://adamone.rchomepage.com/calc_thrust.htm
i get this:
TBM 32 x 10 wood prop @ 4600 rpm = 41 lbs static thrust
Falcon CF 30 x 13 W @ 5600 rpm = 66 pounds static thrust
if
the Falcon CF 30 x 12 L gets 6000 rpm, then static thrust would be = 71 pounds static thrust
i do not know how accurate this calculator is, but at least it will give me a rough idea on the change in thrust by changing the props!!
anyone think this motor can reach 6000 rpm with the 30 x 12 L CF prop????
Bunky.F.Knuckle
150cc
Possibly......
Bunky.F.Knuckle
150cc
I find that some (most) online calculators are very inaccurate. Best thing to do is to fly each of the props you have, and choose the one that suits your flying style best.
ECalc is about as accurate is one can get. But it is for Electric flight.
You'll find out that the DA150 will make around 85# of thrust. The old style 3W 150 on PeFa canisters made around 93# with a 30x12 Fuchs 3 blade.
ECalc is about as accurate is one can get. But it is for Electric flight.
You'll find out that the DA150 will make around 85# of thrust. The old style 3W 150 on PeFa canisters made around 93# with a 30x12 Fuchs 3 blade.