Beta Prop

Wouldn't you have this "effect" ANY time you went from a thrusting to a
braking action with regards to thrust generated?

If I pulled power back, set the pitch to flat, and pushed the nose over,
wouldn't the prop be "driving" the engine in the manner you describe?

All of this is able to be done without a specific Beta range.

Dave

PittsS1C wrote:
Is it a good idea to have beta with any geared engines?

Aren't there typically problems with chattering the gears

back and forth leading to failures?



Mike

"Dave S" wrote in message
nk.net...

I believe you are mistaken on the IVO.

The IVO has a specific range of travel that is accomplished by twisting
the blade midshaft, not rotating the entire blade in the hub.

Also, with the auto engines the original poster is discussing, it is less
a function of the engine and more a function of will the PSRU (re-drive)
support a hydraulic governor. The Marcotte and Mistral PSRU's will support
a hydraulic constant speed prop, others such as the Real World Solutions
brand will not.

An electric MT can be obtained that will run in the beta (and even
reverse) ranges, but that is a $10k US proposition. Of course, getting a
hydraulic governor, the price difference for a redrive that supports one,
and getting a hydraulic CS prop, you are likely there with the cost of an
Electric MT in the first place.

It costs money.. plain and simple.

The IVO may be an option for you, but as for a specific "beta" range, I am
fairly sure it doesnt have one.


Dave

Gig 601XL Builder wrote:

I believe both the Woodcomp and the IVO will go into Beta.


"Rob Fonhof" wrote in message
...


Hi All.
Just wondering if there are any props out there that can be used on an
experimental aircraft engine, ie:subaru or RX-8 Renesis, which have a
beta range. Don't even want to consider a certified unit as this would
probably cost more than the rest of the firewall forward components.
Thanks in advance,
Rob.
Melbourne Australia.