Subject: TWIN GEARBOX REDESIGN
From: Rotary Engine
Date: 11/9/2010, 10:49 PM
To: AAA Put this in the To box


 That is looking a lot better Jean.

 Make sure the prop flange is the same as one of
 these SAE standards. The big one is for wood props
 and the smaller one for CS props.

 Paul Lamar


 I PAUL
 I FOLLOW YOUR RECOMMENDATION TO DESIGN WITH NEEDLE BEARINGS
 AND I CAME UP PRETTY GOOD BUT I NEED YOU TO LOOK AT IT AND
 COME BACK WITH YOUR RECOMMENDATIONS.
 I AM SENDING YOU 3 2SHEETS WITH DIMENSIONS


 Jean Prudhomme

 If your drawing program can export IGES or AutoCad DXF files send me
 those
 instead so I can import them into Rhino. STP (STEP) files also work.

 It is best to send the individual part drawings with dimensions rather
 than dimensions on the complete assembly. Too confusing.

 I don't need the part drawings on the Ford planetary parts
 as I have those in Rhino dwgs already.

 Once you have it in Rhino you don't need to send dimension
 at all. All you need send is the Rhino 3DM file.

 Paul Lamar


 Paul all the file are in IGES and i try to transfer to george Grimes
 and he can open it.

 I still working on the full design and i added a snap ring on the
 front to hold the front seal,i will have to use 2 check valves to
 prevent the high pressure to interfer with the low oil pressure.
 I should start to design the separate parts soon and i will forward to
 you



 Jean Prudhomme


 Here is a preliminary Rhino rendering. It will take a lot more
 work. The prop flange spline may not be accurate. How many
 spline teeth are you planning on Jean? It is also not clear how
 you are going to retain the flange on the spline.


 Paul Lamar


 Good afternoon Paul
 The flange will be secure between the bolt,s flange and the
 reset on mainshaft, i am looking to add a small portion of taper
 at the end of the flange and the shaft for a better tight fit
 when main bolt will be torque, a special shaft with same spline
 as the planet to be machined and will be welded to a steel flat
 bar as a tool to hold the shaft at the moment to torque the prop
 flange bolt

 I added a snap ring at the front to prevent the seal to coming
 out.

 I know your idea to machine the front planet and attached to the
 inside flange flange shaft ,but my point of view it will be less
 machine work and cost to machine the whole planet with the shaft
 and it will be easier to mount the planet gears and will be
 stronger and it will be one pce for lateral movement.
 For machining it can be first drill sideway at each gear close
 to the size and be finish with small end mill bits
 ,those gears shaft head can be pressure fit without driss pin
 secure .

 Just an idea.
 With my design it will be less expensive and easier to replace
 the planet ,the inside flange can have pins with the planet
 surface to increase the strenght, it,s already 6 holes of .250
 for more oil feeding but can be use for pins between the shaft
 flange and planet



 Jean Prudhomme

 Here is what it would look like with a housing made
 from thick wall tube and plate instead of the mini sprint bell.

 There are two tube sizes needed. Four inch dia. 1/2 inch wall
 and six inch dia. one inch wall. The four inch can be bored
 out of bar stock as I found a shop in SZP with a really big old
 lathe than can drill 3 inch dia. holes in 4 inch dia. bar stock in
 one operation. You weld everything together and then machine it
 to final dimensions like Don Dunbar did on his gear box.
 Don'3 was a bit over kill as far as thickness's were
 concerned. I also don't think the webs are required but
 they can be welded in with no trouble.

 This would be better than the mini sprint bell as the 6" dia. section
 that holds the ring gear can be made long enough to accommodate
 all the thrust bearings required. Just like Tracy's box.

 Also it will fit Jeff's stock motor plate.

 Paul Lamar


 Paul, I have a couple cast housing, 6061 T6 like in picture 6 from an old
 experiment that i will send if you like. Give me the dimensions and I will
 measure them up. no charge.

 milo

 Thanks Milo
 That one is about 5 inches long and six inches in diameter.
 I'll send you a shipping address by private email.

 -------------------------------------------------

 I got it Milo thanks. How many castings do you have?
 I think we can design a box around it.
 ID is about 3 inches and OD at the mount end is 5 inches.

 BTW when are you heading for Texas?


 Paul Lamar



 Paul,
 We only have two of those castings left if you need more our patterns are at
 precision casting in tacoma and one can order through them if interested. Do
 you want the other 2?
 We will leave here on the 19th plan to be at your place before noon on the
 20th. Been packing the test stand today, bigger job than I thought, almost done.

 milo

 Sure. Drop them off somebody may find a home for them.

 Paul Lamar

         Paul I try to export my design in IGES file which it show but it said it can export on that file and i said: the save operation cannot be completed since topology data is unavailable"
I sent you the last corrections and i will start to detaisl all parts.
I already send you an estimated prices for bearings and seals


Jean Prudhomme

               

-- 
The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Youtube key word PaulLamar2
Copyright 1998-2010 All world wide rights reserved.