VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 06-29-2018, 08:22 PM
s10sakota's Avatar
s10sakota s10sakota is offline
 
Join Date: Feb 2005
Location: Westland, MI
Posts: 305
Default Stainless Steel Engine Mount?

A friend of mine bought a new experimental airplane engine. Doesn't matter what it is or what airplane it's going on. What I'm wondering about is that it comes with an engine mount made out of stainless steel.

Every engine mount I've ever known is made from 4130 chromoly steel, right?

It just seems odd to me that someone would make a mount from stainless. But I'm not a metalerologist (is that a word?) and I'm wondering if this is safe.

Does stainless have the same properties as 4130 that it can be used as an engine mount?

Anyone here have any idea?
__________________
Mark Pensenstadler
1962 Piper Cherokee 160
2003 RANS S-10
2011 RANS S-6S
2011 Vans RV-7
2015 Zenith Cruzer

Dec VAF Donation Paid
Reply With Quote
  #2  
Old 06-29-2018, 08:38 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 3,590
Default

Much would depend on the specific grade and heat-treatment and welding process used for a stainless steel engine mount. While 4130 engine mounts are typically made from normalized 4130, they can be heat-treated to a certain degree (mostly, they are normalized), and that further complicates the picture.

Without knowing more, it's an impossible comparison -- that said, a properly engineered engine mount can be made of many materials, including wood. So the answer is: "it depends."

Dave
Reply With Quote
  #3  
Old 06-29-2018, 08:39 PM
Ryano Ryano is offline
 
Join Date: Apr 2017
Location: Seattle
Posts: 50
Default

Metallurgist.....

As for the rest I like to know as well.
__________________
Practice Kit completed 2/19/2017
Tooling up for -7 empennage build.(100% tooled 1/31/2018)!
Orphaned -7 empennage kit purchased! 9/15/2017
-7/8 Rudder 25% complete.
2018 Donation paid...
Reply With Quote
  #4  
Old 06-29-2018, 08:44 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 1,145
Default Ss

Agree with the previous post...it depends. It would definitely not be a direct replacement for 4130. Also, you would need to account for dissimilar metals as ss does not have the same galvanic properties as 4130. Proper engineering would be required to design a safe mount...
__________________
Bob
Aerospace Engineer '88

RV-10
Structure - 90% Done
Cabin Top - Aaarrghhh...
Doors - Done
On Gear
290 HP Barrett Hung
ShowPlanes Cowl with Skybolts Fitted - Beautiful
Wiring...

Dues Paid 2018,...Thanks DR+
Reply With Quote
  #5  
Old 06-29-2018, 09:09 PM
hohocc hohocc is offline
 
Join Date: Sep 2008
Location: Christchurch, New Zealand
Posts: 181
Default

I have no idea whatsoever on the original question.
However, I would like to see the word "metalerologist" added to the dictionary as it's much more logical than "metallurgist", which suggests the person in question is an expert in metallic urges. Whatever they may be.
Reply With Quote
  #6  
Old 06-29-2018, 10:34 PM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 1,792
Default

the min strength properties of garden variety stainless are about half of 4130. stainless steel is the silly putty of steel. that's why you can easily bend a spoon in the cafeteria like I did in high school.
__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 700+ for all

Simplicity is the art in design.

see Amanda Melton for www.rvplasticparts.com
Reply With Quote
  #7  
Old 06-29-2018, 11:22 PM
rv7boy's Avatar
rv7boy rv7boy is offline
Forum Peruser
 
Join Date: Jan 2005
Location: Austinville, Alabama
Posts: 2,341
Default

Quote:
Originally Posted by hohocc View Post
I have no idea whatsoever on the original question.
However, I would like to see the word "metalerologist" added to the dictionary as it's much more logical than "metallurgist", which suggests the person in question is an expert in metallic urges. Whatever they may be.
From Online Etymology Dictionary,

Metallurgy, n.

1704, from Modern Latin metallurgia, from Greek metallourgos "worker in metal," from metallon "metal" (see metal) + ergon "work" (from PIE root *werg- "to do"). Related: Metallurgical; metallurgist.
__________________
Don Hull
RV-7 Wings
KDCU Pryor Field
Pilots'n Paws Pilot
N79599/APRS Automatic Position Reporting System

“Certainly, travel is more than the seeing of sights;
it is a change that goes on, deep and permanent, in the ideas of living." Miriam Beard


"It should be added that the sublime beauty of the facture brings within the realm of discourse the substructure of critical thinking. " -using Doug's Art Critique jargon link and my birthday, I get this!
Reply With Quote
  #8  
Old 06-30-2018, 11:31 AM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,127
Default Stainless

Russian Sukhoi SU26 aerobatic airplanes, entire fuselage and engine mount were welded assemblies made from a special grade of stainless tubing. The SU29 and SU31 terminated the welded structure just behind the seat and the tailcone form there aft was composite, bolted to the forward section.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 02:54 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.