I think Bill Lockwood may have a point in that softer mounts would surely change
the harmonics of the engine/prop combination. But I wonder if his blanket
statement
is valid for all prop/engine combos?
I wonder what rpm ranges are the trouble points ("torsional peaks") for the
redrive
with the airmaster prop, on the 914 with the softer mounts? with the harder
mounts?
I wonder if anyone has done a tortional resonance/vibration analysis on the
combination...
likely not I suspect. Is there a shop in the states capable of doing
such testing (like the Bob Harrison had done accross the pond on the Jabiru
3300/MT combo)?
Cheers & full of questions (what else is new?)
Pete
A239
-----Original Message-----
From: Ron Parigoris [mailto:rparigor@suffolk.lib.ny.us]
Sent: Fri 2/14/2003 10:43 AM
To: europa-list@matronics.com
Cc:
Subject: Re: Europa-List: Night and Day
Hey DJA727
On my speedwing monowheel, i plan on installing a 914, with CS.
I spoke to Bill Lockwood, from Lockwood Aviation in FL for some time
bout the rotax motors.
Any viabbarion kills the redrive. Unbalanced carbs, idle too slow and
"MOTORMOUNTS THAT ARE TOO SOFT!"
I am not an expert. I never saw a 914 mount in my hand.
But Bill is suppsedlly an expert and says that 0200 mounts are a bad
thing.
He said use the provided mounts, idle 1800RPM min, sync carbs exact both
low speed and high and have prop dynamic balanced.
Here is his exact quote:
"Motors like to be mounted fairly rigid, he is not real thrilled with
continental 0-200 Lord mounts if they are softer"
This is per a conversation 12-30-2002.
I am only repeating what he said.
Any other comments to the contrary?
Ron Parigoris
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