Today's Message Index:
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1. 09:55 AM - Re: Landing Gear Transmission Question (kempthornes)
2. 10:05 AM - Re: Landing Gear Transmission Question (BobsV35B@aol.com)
3. 10:09 PM - Re: Landing Gear Transmission Question (Ron Davis)
Message 1
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| Subject: | Re: Landing Gear Transmission Question |
--> Beech-List message posted by: kempthornes <kempthornes@earthlink.net>
At 06:02 PM 2/14/2004, you wrote:
>--> Beech-List message posted by: "Randy L. Thwing" <n4546v@mindspring.com>
>
>The transmission consists of worm and ring gear.
Didn't I read somewhere that the Beech landing gear tranny is actually a
convertible top unit from an early Plymouth or some such?
K. H. (Hal) Kempthorne
1965 Debonair for sale - see www.moonrovers.com
Message 2
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| Subject: | Re: Landing Gear Transmission Question |
--> Beech-List message posted by: BobsV35B@aol.com
In a message dated 2/17/04 11:56:26 AM Central Standard Time,
kempthornes@earthlink.net writes:
Didn't I read somewhere that the Beech landing gear tranny is actually a
convertible top unit from an early Plymouth or some such?
Good Morning Hal,
If you did, whoever wrote it was way off base. It is a very highly
engineered unit straight out of Beechcraft.
One of the best things they did on the Bonanza was the landing gear design.
Unfortunately, they blamed one accident in flight testing (falsely I believe)
on the gear coming out slightly in a high G pullout and added the uplocks.
The uplocks change a very elegant system into something of dog.
I think it is time to get rid of the uplocks, but can you imagine the hassle
the FAA would give me on that suggestion?
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Airpark LL22
Downers Grove, IL 60516
630 985-8502
Message 3
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| Subject: | Re: Landing Gear Transmission Question |
--> Beech-List message posted by: Ron Davis <radavis2522@netzero.net>
Hal,
No, but you are in the ballpark. While the gearbox was designed by Beech,
the lube in it was ordinary (at the time) gear oil for Model A Fords: Mobil
Compound GG.
When Model A's became scarce, so did the need for Mobil GG. (Well,
actually, Mobil Compound GG has lotsa lead in it, and that is an EPA no-no.
Not from a usage standpoint, but from a manufacturing standpoint.)
Soooo, it was superseded to Mobilgear 626, which is what we are using today.
The seals / gaskets in both the Ford and Beech gearboxes were originally
made of (moo!) leather, and Mobil GG / Mobilgear 626 does fine, but other
gear oils tend to seep past them, which is why it is so important to use
*only* the recommended lube in these things. And a little goes a long way.
Don't overfill. (But you knew that.)
" The Mobilgear 600 Series are extra high performance gear oils having
outstanding extreme pressure characteristics and load-carrying properties,
intended for use in all types of enclosed gear drives with circulation or
splash lubrication systems. They are formulated from highly refined base
stocks and a special additive system that provides an extremely high level
of resistance to oxidation and chemical degradation. They have
friction-modifying characteristics that reduce power consumption and lower
bulk oil temperatures. The Mobilgear 600 Series oils protect against
corrosion and rusting, including seawater. They have excellent water
separating properties and they are strongly resistant to foaming in service."
Wow. Too bad they can't make an engine crankcase oil with those properties.
Ron D.
kempthornes wrote:
> --> Beech-List message posted by: kempthornes <kempthornes@earthlink.net>
>
> At 06:02 PM 2/14/2004, you wrote:
>
>>--> Beech-List message posted by: "Randy L. Thwing" <n4546v@mindspring.com>
>>
>>The transmission consists of worm and ring gear.
>
>
> Didn't I read somewhere that the Beech landing gear tranny is actually a
> convertible top unit from an early Plymouth or some such?
>
>
> K. H. (Hal) Kempthorne
> 1965 Debonair for sale - see www.moonrovers.com
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