Any Canadians Who Can Provide Numbers on a Champ, Taylorcraft, or Luscombe with Warp Drive Propeller?

"Ron Wanttaja" wrote in message
...
On Fri, 19 Dec 2003 18:05:53 -0500, "Larry Smith"
wrote:

"EDR" wrote in message
...

I have seen Warp Drive
props on friends Ezes. The coning scares me!

What's "coning"?

The prop blades bending forward...the prop disk defines a shallow cone
(open end frontward, of course) under load.

Ron Wanttaja

Thanks. As usual the big R comes through. I've seen the phenomenon but
it's not bothersome to someone knowing the great strength and elasticity
modulus of carbon fiber. Where is testimony that a blade has failed?
There is gossip about an Ivoprop but is it true?

On Sat, 20 Dec 2003 10:06:12 -0500, "Larry Smith"
wrote:


"Ron Wanttaja" wrote in message
.. .
On Fri, 19 Dec 2003 18:05:53 -0500, "Larry Smith"

Thanks. As usual the big R comes through. I've seen the phenomenon but
it's not bothersome to someone knowing the great strength and elasticity
modulus of carbon fiber. Where is testimony that a blade has failed?
There is gossip about an Ivoprop but is it true?


I have a warp drive 70" 3 blade prop on my murphy rebel with an 0-290
engine. I'm very satisfied with the prop and have had no problems with
mine. It's fairly easy to change the pitch takes about an hour
including retourquing and safety wiring everything. You need to check
the torque on the clamp bolts every 25 hrs.
There have been some reports of cracked blades on high compression
engines. It's suspected that the negative power pulses at idle speed
is what causes the cracking.
Drew Dalgleish
Centralia Ont.

Thanks. As usual the big R comes through. I've seen the phenomenon but
it's not bothersome to someone knowing the great strength and elasticity
modulus of carbon fiber. Where is testimony that a blade has failed?
There is gossip about an Ivoprop but is it true?

A friend of mine has a 4 blade on his 180hp Lyc Rebel on floats. He
flies all year including a annual trip to the Arctic (he's located
about 100miles north of the US border so this isn't a quick trip)

He had to land once on a lake with about 3-4 foot rollers when heavy
(2K+) and he had spray coming over the windshield etc. Either the
prop dipped into the water or something as afterwards he found
one blade cracked along the root holder. He maintains his machine like
a certified so he grounded the airplane and was on to warp about it
pdq. They said he could fly with it as is ie it was still servicable
and it wouldn't hurt anything. I think he said he only flew it a few
minutes before getting too paranoid about it. He called warp and they
replaced the blade for free. They said at that time his was the first
damaged blade they had seen and that was in 2000. He still swears by
it even though I think he's thinking about a hoffman or the like so
he can nudge closer to mach 1 on floats...

Even under owner maintained you won't be able to swap a warp for a
certified blade. The ministry will tend to frown on such things. You
could get a stc and hope they will let you spec a warp but as its not
certified you are going to have to be reaaal lucky to get it through.
The fee is $900 loonies plus engineering fees which means it will
probably be cheaper to buy a new plane by the end f it all ;-]

Q

On Sun, 21 Dec 2003 20:01:57 GMT, " quipbid
wrote:

Snip nice rebel story
Even under owner maintained you won't be able to swap a warp for a
certified blade. The ministry will tend to frown on such things. You
could get a stc and hope they will let you spec a warp but as its not
certified you are going to have to be reaaal lucky to get it through.
The fee is $900 loonies plus engineering fees which means it will
probably be cheaper to buy a new plane by the end f it all ;-]

Q

I haven't heard of aircraft registered in the owner maintenance class
requiring an STC for anything before. Where did you get this
information from? I was under the impression that pretty much
anything goes. That's how we end up with corvette powered sea-bees
Drew Dalgleish