Prop sync and noise in twins

On May 22, 9:30 am, Bertie the Bunyip wrote:
buttman wrote groups.com:



On May 21, 9:50 pm, Mxsmanic wrote:
Dudley Henriques writes:
We had a Cessna 337 on our line for charter use at one time. It had
a sync gauge. Strangely enough, whenever I had occasion to fly this
bird I always ended up syncing the props by ear. You could easily
feel if one of them was out even by a small amount of RPM.

Logically the smallest differences would also be the most annoying,
since they would result in such slow variations. And in theory you
should be able to eliminate them by adjusting RPM manually. But
since the Baron has a prop sync switch it occurred to me that perhaps
the RPM levers aren't precise enough to make it easy to sync the
props (?).

I'm still not clear on whether or not this switch actually moves the
prop levers or what. If it does, it sounds expensive, since it needs
an actuator or servo in the cockpit or along the linkage. If it
doesn't, it means that some of the engine control positions might not
accurately reflect the actual engine settings and that engine
settings might not obey the control movements if prop sync is
operating.

--
Transpose mxsmanic and gmail to reach me by e-mail.

In the baron I got my multi in, you had to first get the props sync'd
up to within 50 rpm. Then you press the sync button and it fine tunes
the prop governors to get them exact. At least thats how I remember
it, it's been a while. Get a POH, it'll have detailed descriptions of
the system. IIRC Beechcraft POH's are pretty expensive (over $100)

Wow, the modern CFI, waht a mrvel he is.

Bertie



Well I'll bet he can spell-check, fjucktard.

When I get senile dementia, I want to be just like Bertie Butnip!

EatMe wrote in
oups.com:

On May 22, 9:30 am, Bertie the Bunyip wrote:
buttman wrote
groups.com:



On May 21, 9:50 pm, Mxsmanic wrote:
Dudley Henriques writes:
We had a Cessna 337 on our line for charter use at one time. It
had a sync gauge. Strangely enough, whenever I had occasion to
fly this bird I always ended up syncing the props by ear. You
could easily feel if one of them was out even by a small amount
of RPM.

Logically the smallest differences would also be the most
annoying, since they would result in such slow variations. And in
theory you should be able to eliminate them by adjusting RPM
manually. But since the Baron has a prop sync switch it occurred
to me that perhaps the RPM levers aren't precise enough to make it
easy to sync the props (?).

I'm still not clear on whether or not this switch actually moves
the prop levers or what. If it does, it sounds expensive, since
it needs an actuator or servo in the cockpit or along the linkage.
If it doesn't, it means that some of the engine control positions
might not accurately reflect the actual engine settings and that
engine settings might not obey the control movements if prop sync
is operating.

--
Transpose mxsmanic and gmail to reach me by e-mail.

In the baron I got my multi in, you had to first get the props
sync'd up to within 50 rpm. Then you press the sync button and it
fine tunes the prop governors to get them exact. At least thats how
I remember it, it's been a while. Get a POH, it'll have detailed
descriptions of the system. IIRC Beechcraft POH's are pretty
expensive (over $100)

Wow, the modern CFI, waht a mrvel he is.

Bertie



Well I'll bet he can spell-check, fjucktard.

Oow! Isn't he clever!


When I get senile dementia, I want to be just like Bertie Butnip!

I know you do. It's written all over you.

Bertie