---------------------------------------------------------- Beech-List Digest Archive --- Total Messages Posted Tue 02/17/04: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 09:55:42 AM PST US From: kempthornes Subject: Re: Beech-List: Landing Gear Transmission Question --> Beech-List message posted by: kempthornes At 06:02 PM 2/14/2004, you wrote: >--> Beech-List message posted by: "Randy L. Thwing" > >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 _____________________________________ Time: 10:05:59 AM PST US From: BobsV35B@aol.com Subject: Re: Beech-List: 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 _____________________________________ Time: 10:09:11 PM PST US From: Ron Davis Subject: Re: Beech-List: Landing Gear Transmission Question --> Beech-List message posted by: Ron Davis 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 > > At 06:02 PM 2/14/2004, you wrote: > >>--> Beech-List message posted by: "Randy L. Thwing" >> >>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