controllable pitch props

controllable pitch props

The type certificate for my aircraft - C-120 lists several props that are controllable or variable


Beech R002-101 or Beech R003-100, Koppers Aeromatic F200, Sensenich Controllable C2FB1, for example.

Anyone know anything about any of these props ? Where to find them, how they work, typical maintenance history , installation cost  etc  ?

I can't see any significant disadvantage ( except gross weight ) to having controllable pitch and two advantages ( fuel burn and climb performance )

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Re: controllable pitch props

Dont have experience with any one particular type of controllable prop, but have seen few problems with them.  From what I have seen, they seem to be reliable, and need little maint.

Tom
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Re: controllable pitch props

Your statement is somewhat vague.

A particular make & model would narrow things down.

Some may have AD's .

The ones you refer to have been around a long time.

Most Non-fixed props have CALENDAR overhaul times.  Usually 5years.

If memory serves me the Sensenich 2 Position had a AD that required the blades to be removed & Lag Bolts re-torqued

EVERY 25 hours.

The Beech -Roby used a Hand Crank on light aircraft & Electric motor on heavier.

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Re: controllable pitch props

Thanks for the info. On another site someone sent me this link for the aero-matic prop - apparently someone is rebuilding them   www.aeromatic.com though the price is a tad steep - $5000+

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