13brv3 wrote:Thanks for the link. I don't see how that prop isn't stalled at lower speeds.
Rusty
xeriotti wrote:Maybe they are DE-Tuning the 912 performance to make the Aerovees look good? XD
xeriotti wrote:garyb wrote:Hi
My Rotax powered Sonex has a 68 inch wooden GT propeller off a Tecnam P2008 .Static rpm is around 5100, Solo it climbs sea level at 1800 fpm at 70 kts, cruise 2500' 120 kts 5200 rpm and 5500 135 kts WOT it pulls to the red line 5800 rpm. The prop could probably do with a little more pitch.
Cheers
Gary!! Thats great info!!! Are you aware of the pitch of that propeller? If its not explicit in the model... Maybe we can decode it from your serial number. The other way is to measure the angle at 75% of the radius. But its a tricky task (much more tricky if installed on the plane!)
How fast is your level flight at 5800 WOT? And what fuel consumption are you seeign at your 120kt 5200rpm cruise?
PS: Those numbers are amazing... I think i went the right way with the 912...
garyb wrote:Hi
I worked out the pitch to be 67.5 inches the P/N of the prop is (GT2-173-VRR-FW 101 SRTC) so I think GT don't want anyone to know the actual pitch. At WOT I cant leave it there as that's were the redline starts, its burning 4 gallons/hour in cruise.
Cheers
Onex0029 wrote:Does anyone know if, and where, a person could get extended gear legs manufactured?
Kai wrote:But Rotax insists you also need to dynamically balance the prop- easier said than done with the conical Sonex prop hub and the skull cap spinner: where to position the neccessary balancing weights?
Comments?
tx_swordguy wrote:I balanced my 3300 jabiru sonex and yes the heavy spinner is a pain. I have a couple of extended prop bolts that have as many as 10 washers to balance. Felt better about that than drilling out weight. My a&p asked about it the next condition but said it was fine. I did notice a difference in vibration
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