Clup prop

[Corky Scott]

I'm looking for a club prop I can use to break in/test an engine. I
could use a regular prop I suppose, but the engine will be on a test
stand and I'd rather have something with a reduced diameter for
safety.

The engine will be producing around 180 to 190 hp and I'd like to be
able to run it up to full power/rpm for extended periods. Maximum
prop rpm will be 2400. The prop hub has a standard bolt pattern.

Any ideas? Suggestions?

Thanks, Corky Scott

[Rich S.]

"Corky Scott" > wrote in message
...
> I'm looking for a club prop I can use to break in/test an engine. I
> could use a regular prop I suppose, but the engine will be on a test
> stand and I'd rather have something with a reduced diameter for
> safety.
>
> The engine will be producing around 180 to 190 hp and I'd like to be
> able to run it up to full power/rpm for extended periods. Maximum
> prop rpm will be 2400. The prop hub has a standard bolt pattern.
>
> Any ideas? Suggestions?

Hook it to a generator and sell the electricity to the local power company?

Rich "Waste not, want not" S. :)

[Russell Kent]

Corky Scott wrote:

> I'm looking for a club prop I can use to break in/test an engine. I
> could use a regular prop I suppose, but the engine will be on a test
> stand and I'd rather have something with a reduced diameter for
> safety.
> The engine will be producing around 180 to 190 hp and I'd like to be
> able to run it up to full power/rpm for extended periods. Maximum
> prop rpm will be 2400. The prop hub has a standard bolt pattern.
>
> Any ideas? Suggestions?

"Rich S." replied:

> Hook it to a generator and sell the electricity to the local power company?

Not a half bad idea, until you do the math. At 180 HP at the prop you're
talking 134 kilowatts of power. That's probably _only_ 120 kilowatts if the
generator is 90% efficient. (Actually, I hope it is better than that, because
the leftover watts go into heating the generator!) It seems to me that a
generator capable of handling that size power conversion would be expensive to
rent...

Russell Kent

[Rich S.]

"Russell Kent" > wrote in message
...
>
> Not a half bad idea, until you do the math. At 180 HP at the prop you're
> talking 134 kilowatts of power. That's probably _only_ 120 kilowatts if
the
> generator is 90% efficient. (Actually, I hope it is better than that,
because
> the leftover watts go into heating the generator!) It seems to me that a
> generator capable of handling that size power conversion would be
expensive to
> rent...

Split the profit with the generator owner. If you cook the books right,
there won't be any money left over for him - you know, like Hollywood
studios do when they make a percentage deal with a star.

Rich "It's all in the numbers" S.

[Bob Chilcoat]

The electric fan you'll need to run to keep the engine cool will eat up a
lot of your profit.

--
Bob (Chief Pilot, White Knuckle Airways)


"Rich S." > wrote in message
...
> "Russell Kent" > wrote in message
> ...
> >
> > Not a half bad idea, until you do the math. At 180 HP at the prop
you're
> > talking 134 kilowatts of power. That's probably _only_ 120 kilowatts if
> the
> > generator is 90% efficient. (Actually, I hope it is better than that,
> because
> > the leftover watts go into heating the generator!) It seems to me that
a
> > generator capable of handling that size power conversion would be
> expensive to
> > rent...
>
> Split the profit with the generator owner. If you cook the books right,
> there won't be any money left over for him - you know, like Hollywood
> studios do when they make a percentage deal with a star.
>
> Rich "It's all in the numbers" S.
>
>

[Daniel]

(Corky Scott) wrote in message >...
> I'm looking for a club prop I can use to break in/test an engine. I
> could use a regular prop I suppose, but the engine will be on a test
> stand and I'd rather have something with a reduced diameter for
> safety.
>
> The engine will be producing around 180 to 190 hp and I'd like to be
> able to run it up to full power/rpm for extended periods. Maximum
> prop rpm will be 2400. The prop hub has a standard bolt pattern.
>
> Any ideas? Suggestions?
>
> Thanks, Corky Scott

Lots of OT responses, which is OK, but I'd like to hear an on topic
answer to how one sizes an appropriate club for any given engine.
Anybody have an answer?

Daniel

[John Roncallo]

Daniel wrote:

> (Corky Scott) wrote in message >...
>
>>I'm looking for a club prop I can use to break in/test an engine. I
>>could use a regular prop I suppose, but the engine will be on a test
>>stand and I'd rather have something with a reduced diameter for
>>safety.
>>
>>The engine will be producing around 180 to 190 hp and I'd like to be
>>able to run it up to full power/rpm for extended periods. Maximum
>>prop rpm will be 2400. The prop hub has a standard bolt pattern.
>>
>>Any ideas? Suggestions?
>>
>>Thanks, Corky Scott
>
>
> Lots of OT responses, which is OK, but I'd like to hear an on topic
> answer to how one sizes an appropriate club for any given engine.
> Anybody have an answer?
>
> Daniel

I would say trial and error would be the easyest way. Start big and
shave down until you get your 2400 RPM at WOT.

John Roncallo