PPRuNe Forums - Search Results

Search: Posts Made By: barit1

Showing results 1 to 6 of 6
Search took 0.00 seconds.

Forum: Tech Log

1st Dec 2011, 21:43

Replies: 22

Effects of changing propeller rpm on propeller pitch

Views: 9,754

Posted By barit1

JammedStab: Were I editing this class note,...

JammedStab:

Were I editing this class note, it would say: "Aerodynamic and centrifugal loads on the propeller..." -- and -- were I a betting man, I'd say the centrifugal load creates a greater...

Forum: Tech Log

29th Nov 2011, 01:37

Replies: 22

Effects of changing propeller rpm on propeller pitch

Views: 9,754

Posted By barit1

Sorry aerobat77 - there are two possible...

Sorry aerobat77 - there are two possible pitchlock systems, serving different purposes.

The one I described above is a safety device, protecting against destructive overspeed in case of a...

Forum: Tech Log

28th Nov 2011, 16:09

Replies: 22

Effects of changing propeller rpm on propeller pitch

Views: 9,754

Posted By barit1

Not on all types. If counterweights and/or...

Not on all types. If counterweights and/or springs are involved, the above is true.

But if it's solely a double-acting hydraulic system (H-S Hydromatic e.g.) then centrifugal force on the blades...

Forum: Tech Log

26th Nov 2011, 23:06

Replies: 22

Effects of changing propeller rpm on propeller pitch

Views: 9,754

Posted By barit1

The prop control has its own oil pump, at least...

The prop control has its own oil pump, at least in the props I'm familiar with, thus not dependent on the engine oil pump. The prop system may even have its own independent reservoir.

Forum: Tech Log

25th Nov 2011, 19:18

Replies: 22

Effects of changing propeller rpm on propeller pitch

Views: 9,754

Posted By barit1

Although oil pressure may be the most common way...

Although oil pressure may be the most common way of controlling the prop, there are alternative systems: Electric (e.g. Curtiss), and manual (Roby). Neither is affected by oil pressure.

And I'll...

Forum: Tech Log

23rd Nov 2011, 02:17

Replies: 22

Effects of changing propeller rpm on propeller pitch

Views: 9,754

Posted By barit1

Yes - it takes more energy to spin props to a...

Yes - it takes more energy to spin props to a higher RPM, and instead of it coming from the engine, it comes out of the slipstream. And it shows up as parasitic drag, hence a steeper glide angle.

Showing results 1 to 6 of 6