VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #1  
Old 02-12-2020, 03:14 AM
jelliott82 jelliott82 is offline
 
Join Date: Oct 2018
Location: Dunedin, New Zealand
Posts: 17
Default RV7 IO-360 M1B Engine Mount Query

Hello

I have the IO-360 M1B as supplied by Vans with the matching firewall forward kit and I am currently bolting up the engine to the mount. On the bottom 2 isolators and mounting lugs they are not sitting flat as the oil sump casting sticks out past the flat engine mounting face as you can see in the photo attached.

In my firewall forward kit I received the 4x isolator kits which each included a large flat washer which is under the head of all 4 bolts and mounts, and then separately with the engine mounting bolts in the Vans kit there were 2 slightly smaller diameter large washers included, as you can see in the second photo.

My thoughts are that I could use these 2 washers on the front side of the BOTTOM isolators to space the engine mounting lugs out and clear the sump casting .. but I am conscious I could be adding up-thrust by doing so.

What are you guys doing with this?

https://ibb.co/thRTB6L
https://ibb.co/zmmfjR7

Thanks,
Jonathan
Reply With Quote
  #2  
Old 02-12-2020, 10:01 AM
flyinga flyinga is offline
 
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 639
Default

I did not use the Hutchinson isolators. Check the instructions closely as (with the isolators I used) the washers are placed differently on the top and bottom positions.
__________________
Jim Averett
RV-8
TS36 - Silver Wings
Fredericksburg, TX
Reply With Quote
  #3  
Old 02-12-2020, 01:19 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,203
Default

From your picture it looks like the engine flange and the mount are parallel or pretty close, but the isolator looks angled. Is the isolator just not correctly seated in the mount? Maybe take the weight off and try to reposition?
__________________
Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
Reply With Quote
  #4  
Old 02-12-2020, 04:58 PM
elev666 elev666 is offline
 
Join Date: Feb 2013
Location: Kincardine Ont,Can
Posts: 149
Default

I I remember going through the same issue when I built my 6, I had to use one next to the sump casting, I didnít get he isolation mounts from Vans for this project since I went with the Lord mounts , ,, upon checking in the shop I did get my bolt kit from Vans and Iím looking at eight washers in total , maybe you are short A couple of the large washers that would allow you to put washers on each side of the isolator
__________________
C-GARV RV 6
1946 C85 J3
RV 7 A project
Grounds keeper @ CKS9
Reply With Quote
  #5  
Old 02-12-2020, 06:06 PM
AZSteve053 AZSteve053 is offline
 
Join Date: Jan 2013
Location: Payson, Arizona
Posts: 10
Default Engine isolator & washers - See Dwg 46A

Look at Van's RV7 drawing package - dwg 46A which is specifically for nose draggers but has a good picture of the Typical Installation of Dynafocual mounting parts. Of particular interest should be note 3 which says "Washers provide clearance for rubber mount to fit over step in engine case".

I used this exact stack-up on my RV7 tail dragger with IO360 M1B & it works great... your Hutchinson isolators are likely similar...
Reply With Quote
  #6  
Old 02-12-2020, 06:32 PM
jelliott82 jelliott82 is offline
 
Join Date: Oct 2018
Location: Dunedin, New Zealand
Posts: 17
Default

Quote:
Originally Posted by AZSteve053 View Post
Look at Van's RV7 drawing package - dwg 46A which is specifically for nose draggers but has a good picture of the Typical Installation of Dynafocual mounting parts. Of particular interest should be note 3 which says "Washers provide clearance for rubber mount to fit over step in engine case".

I used this exact stack-up on my RV7 tail dragger with IO360 M1B & it works great... your Hutchinson isolators are likely similar...
Perfect, Thank you! Yes that looks exactly like what I need to do and it mentions it in Note 3 on dwg 46A too ... bottom only.

Thanks,
Jonathan
Reply With Quote
  #7  
Old 02-12-2020, 09:05 PM
AZSteve053 AZSteve053 is offline
 
Join Date: Jan 2013
Location: Payson, Arizona
Posts: 10
Default Happy to Help

Glad to help a fellow builder anytime
Steve
Reply With Quote
  #8  
Old 02-13-2020, 06:10 AM
Iluke Iluke is offline
 
Join Date: Jun 2011
Location: Hope Valley, Rhode Island
Posts: 133
Default

+1 for what AZSteve said. We just mung our M1B a couple of weeks ago and followed the guidance on DWG 46A very carefully, especially the difference in washer between the upper and lower mounts. The extra washer on the bottom mounts seems there specifically to avoid the problem you had. And it corresponds to using longer bolts on the bottom.
__________________
Ivan Luke
Hope Valley, RI
RV-7 SB
Just hung the engine!
2020 dues paid
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 02:04 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.