Nov 12, 2019 Thread starter #61 Zipper730 Chief Master Sergeant 4,327 950 Nov 9, 2015 I was thinking about something -- to determine propeller tip-speed you'd compute the RPM/60 and then multiply that by the circumference of the propeller, right?
I was thinking about something -- to determine propeller tip-speed you'd compute the RPM/60 and then multiply that by the circumference of the propeller, right?
Nov 12, 2019 #62 fubar57 General 32,437 18,712 Nov 22, 2009 The Jungles of Canada Gooooooogle Prop tip speed formula
Jan 24, 2020 Thread starter #63 Zipper730 Chief Master Sergeant 4,327 950 Nov 9, 2015 kmccutcheon , P PStickney , S Shortround6 Several matters... What's the propeller gear-ratios seen on the Griffon's? When factoring in speed it's =SQRT(Tip-Speed)^2+(Forward Velocity)^2) right?
kmccutcheon , P PStickney , S Shortround6 Several matters... What's the propeller gear-ratios seen on the Griffon's? When factoring in speed it's =SQRT(Tip-Speed)^2+(Forward Velocity)^2) right?
Jan 28, 2020 #64 W wuzak Captain 8,190 2,733 Jun 5, 2011 Hobart Tasmania Zipper730 said: What's the propeller gear-ratios seen on the Griffon's? Click to expand... Which mark of Griffon?
Zipper730 said: What's the propeller gear-ratios seen on the Griffon's? Click to expand... Which mark of Griffon?
Jan 29, 2020 Thread starter #65 Zipper730 Chief Master Sergeant 4,327 950 Nov 9, 2015 Did any of them have gear ratios other than 0.451 and 0.5102?
Jan 29, 2020 #66 W wuzak Captain 8,190 2,733 Jun 5, 2011 Hobart Tasmania Yes, the contra props had a different ratio.
Jan 29, 2020 Thread starter #67 Zipper730 Chief Master Sergeant 4,327 950 Nov 9, 2015 wuzak said: Yes, the contra props had a different ratio. Click to expand... What ratio did the contra-rotating propellers use?
wuzak said: Yes, the contra props had a different ratio. Click to expand... What ratio did the contra-rotating propellers use?