REFLECTOR: IVO prop adjustment

[Michael Watson]

John,

Over speed is not a good thing, although the red line on the Franklin used
in choppers
was 3100 RPM. (small piston/balance shaft. Dwayne once told me that when he
flew
the Franklin powered V. mid way down the runway, he would start pulling back
on the prop
so at lift off it would be at 2800.

Three years ago, I bought a new set of blades from IVO, (Now BLACK only) and
sent the
original white one's back for re-furbishing and balance. He fixed the nicks
and gouges with
BLACK gel cote, now it looks like a fire truck dog.

There was a kozy 1V in my hanger that landed hard and took one inch off each
of his blades.
He took another half inch off each blade to balance them and then went
flying. I don't recall
him saying his plane was now faster of take off slower.


On 3/20/07, John Dibble <aminetech at bluefrog.com> wrote:
>
> Mike,
>
> That helps a lot.  I just have one washer on either end.  I don't see why
> it matters to have a washer on the coarse pitch end.  I get 2600 rpm at the
> beginning of the TO roll.  I do overspeed at liftoff.  However, previously I
> was limiting climb to 1000 fpm due to oil cooling problems.  I think I have
> fixed the cooling problem by extending the cooling air exit duct below the
> fuselage, but haven't had the opportunity to check it out in warmer OATs.
> Maybe I won't overspeed if I can climb faster.  What rate do you climb at?
> But there's more to the story.  I just had IVO take 3/4" off the blades.
> Not something I necessarily wanted, but I wanted to match them to 2 old
> blades so I would have spares (they don't make white ones any more).  They
> told me that the shorter blades would have less climb, but better cruise.  I
> don't feel I need more climb, and who doesn't want more cruise speed?  So,
> I'll see what happens when I get back home and get the blades on.  I'm
> expecting that I will need at least another washer on the fine pitch end.
>
> John
>
> Michael Watson wrote:
>
> I have not changed one washer to see the change in RPM, but,
> I have three washers on the inside on the worm gear (engine side)
> and two washers on the outside of the worm gear. This results in
> full throttle static fine pitch of 2550 RPM and 2760  RPM in cruise.
>
> I originally had  two washers on the engine side of the worm gear and
> the engine would tend to over speed (2800+ rpm) at lift off. So, ma be one
>
> washer made a 40~60 RPM difference. Hope this help.
>
> --
> Mike W
> 1997 Velocity Elite RG
> Franklin /IVO Electric CS
>
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-- 
Mike W
1997 Velocity Elite RG
Franklin /IVO Electric CS
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