X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail01.syd.optusnet.com.au ([211.29.132.182] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTPS id 916435 for flyrotary@lancaironline.net; Sat, 07 Jan 2006 03:54:24 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.182; envelope-from=lendich@optusnet.com.au Received: from george (d58-105-111-105.dsl.nsw.optusnet.com.au [58.105.111.105]) by mail01.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k078rTx1003007 for ; Sat, 7 Jan 2006 19:53:32 +1100 Message-ID: <004601c61367$d77c13b0$696f693a@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Fw: [FlyRotary] Re: Dodge vs Ford Date: Sat, 7 Jan 2006 18:53:33 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0043_01C613BB.A8691970" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0043_01C613BB.A8691970 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Fw: [FlyRotary] Re: Dodge vs FordKen, Thanks for that info: 62/28 =3D 2.21+1 =3D3.21 - your correct, yet again! Sun gear 28 against 42 that's interesting, 1.5 times the size teeth, = that does make it stronger. Point taken on the planet gear speed as well. I think the bigger teeth will give less contact area, but the greater = load transfer is compensated with the increased sized teeth. Thanks Ken - I hope I helped eliminate the confusion! George The tooth count for the dodge is 62 on ring 28 on the sun and 17 on = the planets. Comparing the C-6 gears that are used in the 2.17 and 3.17 ratio to = the Dodge 3.21 ratio the Dodge gears have much bigger teeth, the sun = gears are the same outside diameter but the C-6 has teeth and the Dodge = has 28 teeth, this is do to the larger teeth on the Dodge. Also the ring gears have the same inside diameter but the C-6 has 74 = teeth and the dodge has 62 teeth do to the larger teeth on the Dodge. The surface speed remains about the same but the teeth are bigger, = sounds stronger to me. I have built off road race car transmissions for years and although = manual not stick and always the gears with bigger teeth were always = stronger. Another thing that I noticed when I was looking at gears at the = tranny shop is that the C-6 set that gives 2.85 ratio has a bigger sun = gear and the planet gears were real small do to the larger sun gear so = that would raise the planet gear rpm. Here is a shot of both gears side by side, its clear to see the = difference. Ken Welter Ken, Some additional info! I look at the planetary as I look at a external toothed gear engaged = to a drive gear. The smaller drive gear has to travel ( with the E4D) 2.85 times = further than the larger gear ( the larger gear has 2.85 times additional = teeth). The planetary gears ( in my mind ) merely transfers the loads. Their = not involved with varying the Ratio! No matter how it's used in a Vehicle/ Truck, we will use it the same = as we use the other planetaries, so the assessment is the same as the = other planetaries. So I'm figuring that the ring gear must be about 84 for the ring = gear and about 38 for the sun gear e.g. 84/ 38 =3D 2.21 +1 =3D3.21 If you can give me the tooth count we can evaluate from there - no = pressure and no confusion. George ( down under) Ken, The ratio is ring gear tooth (numbers) divided by sun gear teeth( = numbers). If drive is taken out of the planet (turning RH) =3D A divided by B = =3D 2.21+ 1 =3D 3.21 If drive is taken out of the ring gear ( turning LH) =3D A divided = by B =3D 3.21 EG the E4D is 78 toothed Ring gear divided by the 42 toothed sun = gear =3D1.85:1+1 =3D 2.85:1 and the 2.17 is a LH turning planetary with ring gear held can't = remember the tooth count. It doesn't matter 'what drives what' in the Truck - just count the = teeth. George ( down under) -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_0043_01C613BB.A8691970 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Re: [FlyRotary] Fw: [FlyRotary] Re: Dodge vs = Ford
Ken,
Thanks for that info:
62/28 =3D 2.21+1 =3D3.21 - your = correct, yet=20 again!
Sun gear 28 against 42 that's=20 interesting, 1.5 times the size teeth, that does make it=20 stronger.
 
Point taken on the planet gear speed as = well.
 
I think the bigger teeth will give less = contact=20 area, but the greater load transfer is compensated with the increased = sized=20 teeth.
 
Thanks Ken - I hope I helped eliminate = the=20 confusion!
George
 
   The tooth count for the dodge = is 62 on=20 ring 28 on the sun and 17 on the planets.
  Comparing the C-6 gears that are = used in the=20 2.17 and 3.17 ratio to the Dodge 3.21 ratio the Dodge gears have much = bigger=20 teeth, the sun gears are the same outside diameter but the C-6 has = teeth and=20 the Dodge has 28 teeth, this is do to the larger teeth on the=20 Dodge.
  Also the ring gears have the same = inside=20 diameter but the C-6 has 74 teeth and the dodge has 62 teeth do to the = larger=20 teeth on the Dodge.
  The surface speed remains about the = same but=20 the teeth are bigger, sounds stronger to me.
  I have built off road race car = transmissions=20 for years and although manual not stick and always the gears with = bigger teeth=20 were always stronger.
  Another thing that I noticed when I = was=20 looking at gears at the tranny shop is that the C-6 set that gives = 2.85 ratio=20 has a bigger sun gear and the planet gears were real small do to the = larger=20 sun gear so that would raise the planet gear rpm.
  Here is a shot of both gears side by = side, its=20 clear to see the difference.
  Ken Welter




 
Ken,
Some=20 additional info!
 
I = look at the=20 planetary as I look at a external toothed gear engaged to a drive=20 gear.
The smaller=20 drive gear has to travel ( with the E4D)  2.85 = times further=20 than the larger gear ( the larger gear has 2.85 times additional=20 teeth).
 
The = planetary gears=20 ( in my mind ) merely transfers the loads. Their not involved with = varying=20 the Ratio!
 
No = matter how it's=20 used in a Vehicle/ Truck, we will use it the same as we use the = other=20 planetaries, so the assessment is the same as the other=20 planetaries.
 
So = I'm figuring=20 that the ring gear must be about 84 for the ring gear and about 38 = for the=20 sun gear e.g.  84/ 38 =3D 2.21 +1 =3D3.21
 
If = you can give me=20 the tooth count we can evaluate from there - no pressure and no = confusion.
George ( down=20 under)
 
 
 
 
Ken,
The = ratio is ring=20 gear tooth (numbers) divided by sun gear teeth(=20 numbers).
If  drive is=20 taken out of the planet (turning RH) =3D A divided by B =3D = 2.21+ 1 =3D=20 3.21
If = drive is taken=20 out of the ring gear ( turning LH) =3D A divided by B=20 =3D 3.21
 
EG = the E4D is 78=20 toothed Ring gear divided by the 42 toothed sun gear =3D1.85:1+1 =3D = 2.85:1
and the=20 2.17  is a LH turning planetary with ring gear held can't = remember the=20 tooth count.
It = doesn't matter=20 'what drives what' in the Truck - just count the = teeth.
George ( down=20 under)
 

--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:  =20 http://mail.lancaironline.net/lists/flyrotary/
------=_NextPart_000_0043_01C613BB.A8691970--