Re: prop nut drawing

Joe Preston · Post by **Joe Preston** » Thu Jun 02, 2016 6:58 am

'Here is a copy of the drawing. I also sent it to the group, but attachments are not allowed, so I doubt it will go through

Joe Preston

[Non-text portions of this message have been removed]'

Craig · Post by **Craig** » Thu Jun 02, 2016 7:33 am

' Here is a link to download the spec: http://everyspec.com/MS-Specs/MS5/MS5011A_18747/

Craig

On 06/02/2016 07:58 AM, Joe Preston Joe@Preston-Company.com [fairchildclub] wrote:

Here is a copy of the drawing. I also sent it to the group, but attachments are not allowed, so I doubt it will go through

Joe Preston

[Non-text portions of this message have been removed]

'

Cy Galley · Post by **Cy Galley** » Thu Jun 02, 2016 9:02 am

' #ygrps-yiv-859502841 {font-family:'Times New Roman';font-size:17px;} If I remember right the torque is very high on this nut. You will need an extender as most Torque Wrenches don't go as high as required.
Cy Galley - Chair Emergency Aircraft Repair

On Thu, 02 Jun 2016 08:33:33 -0500, Craig cvcantwell@verizon.net [fairchildclub] wrote:

everyspec

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Frank Cox · Post by **Frank Cox** » Thu Jun 02, 2016 10:28 am

' From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: 02 June 2016 16:03
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing I am going to have to tighten this nut in the next few months – if anyone has this torque value tucked away in their archives I would be very grateful to hear what it is for a Ranger engine. Many thanks Frank Cox If I remember right the torque is very high on this nut. You will need an extender as most Torque Wrenches don't go as high as required. Cy Galley - Chair Emergency Aircraft Repair

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Ranchaero Wing Shop · Thu Jun 02, 2016 11:29 am

' Frank,

I'm not authoritative on this question but since I'm working on that myself, I'll offer what I've learned so far and have my calcs verified by the list.

The torque value is listed in the Ranger Instruction Book - the little spiral bound book. It's "about" 630 ft lbs. I don't have it here with me so can't look it up, but I'm sure this number is very close. I'll find the book later today and verify the number.

To get that torque at the nut, Charles told me he calculated that his 3/4" steel round bar at 42" works with his weight of 175lbs. I found a website length to torque calculator at: http://www.sensorsone.com/force-and-length-to-torque-calculator/ . Using this calculator I figured that at my weight of 160 lbs, I need a bar 48" long. So I bought a bar at a metal yard here in town that was 3/4" dia and 48" long. When I used it, it bent uselessly (A36). So I ordered a piece of 7/8" x 48" 4130 bar from ACS for about $60 and it works just fine without bending.

Now don't take my word for it. We need to have some of the smart and experienced guys on this list verify that I'm on the right track.

David

On 6/2/2016 9:28 AM, 'Frank Cox' coxs.gorrel@virgin.net [fairchildclub] wrote:

From: fairchildclub@yahoogroups.com [fairchildclub@yahoogroups.com]
Sent: 02 June 2016 16:03
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing I am going to have to tighten this nut in the next few months – if anyone has this torque value tucked away in their archives I would be very grateful to hear what it is for a Ranger engine. Many thanks Frank Cox If I remember right the torque is very high on this nut. You will need an extender as most Torque Wrenches don't go as high as required. Cy Galley - Chair Emergency Aircraft Repair
Virus-free. www.avast.com

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Emil Dular · Post by **Emil Dular** » Thu Jun 02, 2016 5:42 pm

' Ya gotta love the old Army manuals... My 21 October 1940 copy of TM 1-412 AIRCRAFT PROPELLERS says:

"(1) Remove retaining nut lock pin.
(2) Insert 4-foot bar into retaining nut. One man weighing approximately 175 pounds pulling on the end of the bar is sufficient..."

War Department must have considered mechanics might be working under austere conditions.

Emil

----- Original Message -----
From: 'Frank Cox' coxs.gorrel@virgin.net [fairchildclub]
To: fairchildclub@yahoogroups.com
Sent: Thursday, 02 June, 2016 12:28
Subject: RE: [fairchildclub] prop nut drawing

From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: 02 June 2016 16:03
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing

I am going to have to tighten this nut in the next few months ? if anyone has this torque value tucked away in their archiv es I would be very grateful to hear what it is for a Ranger engine.

Many thanks

Frank Cox

If I remember right the torque is very high on this nut. You will need an extender as most Torque Wrenches don't go as high as required.

Cy Galley - Chair Emergency Aircraft Repair

Virus-free. www.avast.com

'

Ranchaero Wing Shop · Post by **Ranchaero Wing Shop** » Thu Jun 02, 2016 6:18 pm

' I was off some on the prop nut torque. The Ranger Instruction Book says 550-600 ft lbs. not 630.

David

On 6/2/2016 9:28 AM, 'Frank Cox' coxs.gorrel@virgin.net [fairchildclub] wrote:

From: fairchildclub@yahoogroups.com [fairchildclub@yahoogroups.com]
Sent: 02 June 2016 16:03
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing I am going to have to tighten this nut in the next few months – if anyone has this torque value tucked away in their archives I would be very grateful to hear what it is for a Ranger engine. Many thanks Frank Cox If I remember right the torque is very high on this nut. You will need an extender as most Torque Wrenches don't go as high as required. Cy Galley - Chair Emergency Aircraft Repair
Virus-free. www.avast.com

'

Rich S. · Post by **Rich S.** » Thu Jun 02, 2016 9:51 pm

'

Sent from my Verizon Wireless 4G LTE Tablet

-------- Original message --------
From: "'Frank Cox' coxs.gorrel@virgin.net [fairchildclub]"
Date: 6/2/2016 9:28 AM (GMT-08:00)
To: fairchildclub@yahoogroups.com
Subject: RE: [fairchildclub] prop nut drawing

From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: 02 June 2016 16:03
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing I am going to have to tighten this nut in the next few months – if anyone has this torque value tucked away in their archives I would be very grateful to hear what it is for a Ranger engine. Many thanks Frank Cox If I remember right the torque is very high on this nut. You will need an extender as most Torque Wrenches don't go as high as required. Cy Galley - Chair Emergency Aircraft Repair

Virus-free. www.avast.com
'

Frank Cox · Post by **Frank Cox** » Fri Jun 03, 2016 1:52 am

'Thanks David and Emil - 575 ft lbs seems a good compromise - being a retired
navy man do you think I am qualified to swing off the end of a 4ft bar to
remove it later on?

From: fairchildclub@yahoogroups.com [mailto:fairchildclub@yahoogroups.com]
Sent: 03 June 2016 01:18
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing

I was off some on the prop nut torque. The Ranger Instruction Book says
550-600 ft lbs. not 630.

David

On 6/2/2016 9:28 AM, 'Frank Cox' coxs.gorrel@virgin.net
[fairchildclub] wrote:

From: fairchildclub@yahoogroups.com
[
mailto:fairchildclub@yahoogroups.com]
Sent: 02 June 2016 16:03
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] prop nut drawing

I am going to have to tighten this nut in the next few months - if anyone
has this torque value tucked away in their archives I would be very grateful
to hear what it is for a Ranger engine.

Many thanks

Frank Cox

If I remember right the torque is very high on this nut. You will need an
extender as most Torque Wrenches don't go as high as required.

Cy Galley - Chair Emergency Aircraft Repair

Virus-free.
www.avast.com

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