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Engine Mount Slump

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Greg McFarlane

Joined: 12 Apr 2012
Posts: 57
Location: Albany Western Australia

Posted: Thu Oct 25, 2012 2:11 am Post subject: Engine Mount Slump

 Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia

dave.saylor.aircrafters(a
Guest

Posted: Thu Oct 25, 2012 2:57 am Post subject: Engine Mount Slump

We set the top cowl 1/8" to 3/16" below the upper edge of the spinner.Â  It drops down just right.Â  Don't worry about the gap changing between the spinner and prop.Â  If you get it right from the start it doesn't change.

  Dave Saylor

831-750-0284 CL

 



On Thu, Oct 25, 2012 at 3:11 AM, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

[quote]  --> RV10-List message posted by: "Greg McFarlane" <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>

 

 [Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia

   

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=385971#385971

 

 

 

 

 

 

 

 ===========

 " target="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 MS -

 k">http://forums.matronics.com

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 e -

  Â  Â  Â  Â  Â -Matt Dralle, List Admin.

 t="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 [b]

carl.froehlich(at)verizon
Guest

Posted: Thu Oct 25, 2012 4:29 am Post subject: Engine Mount Slump

On my 8A I biased the cowl Â¼â€ down on the spinner (as in Â¼â€ from the spinner being exactly in the center).Â  10 years and 700 hours later it is still Â¼â€ down â€“ so no engine slump.

 

On the 10 I did the same but with the James Cowl that translated to the top of the spinner being flush the top of the cowl, and the bottom of the spinner being Â¼â€ above â€œflushâ€ to the bottom of the cowl.Â  58 hours so far and the engine has not moved.

 

Iâ€™ve seen a few long time flying RVs with the spinner proud above the top of the cowl.Â  You may not want to bias the cowl beyond the top of the spinner being flush with the top of the cowl.

 

Carl

 

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Dave Saylor

Sent: Thursday, October 25, 2012 6:57 AM

To: rv10-list(at)matronics.com

Subject: Re: Engine Mount Slump



 

We set the top cowl 1/8" to 3/16" below the upper edge of the spinner.  It drops down just right.  Don't worry about the gap changing between the spinner and prop.  If you get it right from the start it doesn't change.

Dave Saylor

831-750-0284 CL

On Thu, Oct 25, 2012 at 3:11 AM, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

--> RV10-List message posted by: "Greg McFarlane" <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>



[Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=385971#385971



===========

" target="_blank">http://www.matronics.com/Navigator?RV10-List

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MS -

k">http://forums.matronics.com

===========

e -

         -Matt Dralle, List Admin.

t="_blank">http://www.matronics.com/contribution

===========





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   [quote][b]

rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Thu Oct 25, 2012 5:28 am Post subject: Engine Mount Slump

I set my cowl the same as Dave's a year ago.  Mine hasn't dropped yet.  Although, I'm not flying yet.  



Sent from my iPhone



On Oct 25, 2012, at 6:56 AM, Dave Saylor <dave.saylor.aircrafters(at)gmail.com (dave.saylor.aircrafters(at)gmail.com)> wrote:

We set the top cowl 1/8" to 3/16" below the upper edge of the spinner.  It drops down just right.  Don't worry about the gap changing between the spinner and prop.  If you get it right from the start it doesn't change.

  Dave Saylor

831-750-0284 CL

 



On Thu, Oct 25, 2012 at 3:11 AM, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

[quote]  --> RV10-List message posted by: "Greg McFarlane" <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>

 

 [Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia

   

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=385971#385971

 

 

 

 

 

 

 

 ===========

 " target="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 MS -

 k">http://forums.matronics.com

 ===========

 e -

           -Matt Dralle, List Admin.

 t="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 

[b]

_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

philperry9

Joined: 23 Nov 2011
Posts: 381

Posted: Thu Oct 25, 2012 5:34 am Post subject: Engine Mount Slump

I'm interested in knowing how long the engine hung on the mount before the cowling was fitted; then what the drop results were.



Mine has been hanging for nearly a year and I can't imagine getting it to drop too much more - even when it starts operating.

 

Phil



On Thu, Oct 25, 2012 at 8:27 AM, Bob Leffler <rv(at)thelefflers.com (rv(at)thelefflers.com)> wrote:

[quote] I set my cowl the same as Dave's a year ago.  Mine hasn't dropped yet.  Although, I'm not flying yet.  



Sent from my iPhone



On Oct 25, 2012, at 6:56 AM, Dave Saylor <dave.saylor.aircrafters(at)gmail.com (dave.saylor.aircrafters(at)gmail.com)> wrote:

 



We set the top cowl 1/8" to 3/16" below the upper edge of the spinner.  It drops down just right.  Don't worry about the gap changing between the spinner and prop.  If you get it right from the start it doesn't change.

   Dave Saylor

[url=tel:831-750-0284]831-750-0284[/url] CL

 



On Thu, Oct 25, 2012 at 3:11 AM, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

 	  Quote: 	
		     --> RV10-List message posted by: "Greg McFarlane" <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>

 

 [Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia

    

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=385971#385971

 

 

 

 

 

 

 

 ===========

 " target="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 MS -

 k">http://forums.matronics.com

 ===========

 e -

           -Matt Dralle, List Admin.

 t="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 





3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D



	


[b]

Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Thu Oct 25, 2012 5:49 am Post subject: Engine Mount Slump

This isn't a measurement exactly, but I'll tell you I planned

for mine to drop based what other non-RV-10 builders were saying

at the time, since I was one of the earlier completions.

I found that it didn't drop for my RV-10 nearly as much as I

expected it to based on what they said.  So I'd go with your

first reply and maybe do a max of 1/8" or 3/16" if you really

want to push it.  Chances are you'll end up about right maybe

with 1/8" but any more and it may be high forever.



Tim



On 10/25/2012 8:33 AM, Phillip Perry wrote:

 	  Quote: 	
		   I'm interested in knowing how long the engine hung on the mount before

 the cowling was fitted; then what the drop results were.



 Mine has been hanging for nearly a year and I can't imagine getting it

 to drop too much more - even when it starts operating.



 Phil

jfrjr(at)roadrunner.com
Guest

Posted: Thu Oct 25, 2012 5:59 am Post subject: Engine Mount Slump

At initial build I fitted the cowling to match the spinner and the engine had only been hanging for about a month. Then after two years and 250 hours of flying the drop was about 1/4 inch--fairly easy to correct by placing washers (1 thin and 1 thick) on the bottom motor mounts. I had to unbolt twice to get the proper washer thickness in order to have a perfect height. It may be possible to mathmatically calculate the washer thickness but that would be way above my pay grade. Jay Rowe



Sent from my iPhone



On Oct 25, 2012, at 6:33 AM, Phillip Perry <philperry9(at)gmail.com (philperry9(at)gmail.com)> wrote:

[quote]I'm interested in knowing how long the engine hung on the mount before the cowling was fitted; then what the drop results were.



Mine has been hanging for nearly a year and I can't imagine getting it to drop too much more - even when it starts operating.

 

Phil



On Thu, Oct 25, 2012 at 8:27 AM, Bob Leffler <rv(at)thelefflers.com (rv(at)thelefflers.com)> wrote:

 	  Quote: 	
		   I set my cowl the same as Dave's a year ago.  Mine hasn't dropped yet.  Although, I'm not flying yet.  



Sent from my iPhone



On Oct 25, 2012, at 6:56 AM, Dave Saylor <dave.saylor.aircrafters(at)gmail.com (dave.saylor.aircrafters(at)gmail.com)> wrote:

 



We set the top cowl 1/8" to 3/16" below the upper edge of the spinner.  It drops down just right.  Don't worry about the gap changing between the spinner and prop.  If you get it right from the start it doesn't change.

   Dave Saylor

[url=tel:831-750-0284]831-750-0284[/url] CL

 



On Thu, Oct 25, 2012 at 3:11 AM, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

 	  Quote: 	
		     --> RV10-List message posted by: "Greg McFarlane" <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>

 

 [Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia

    

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=385971#385971

 

 

 

 

 

 

 

 ===========

 " target="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 MS -

 k">http://forums.matronics.com

 ===========

 e -

           -Matt Dralle, List Admin.

 t="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 





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3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D



	






===================================

://www.matronics.com/Navigator?RV10-List

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cs.com

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matronics.com/contribution

===================================



	


[b]

rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Thu Oct 25, 2012 6:00 am Post subject: Engine Mount Slump

Hung the engine 2/5/11.  Cowl was fitted four weeks later. So it's been about 20 months with no drop.  So when you see the hub sitting 1/8" proud at OSH, you'll know why.  



Sent from my iPhone



On Oct 25, 2012, at 9:33 AM, Phillip Perry <philperry9(at)gmail.com (philperry9(at)gmail.com)> wrote:

I'm interested in knowing how long the engine hung on the mount before the cowling was fitted; then what the drop results were.



Mine has been hanging for nearly a year and I can't imagine getting it to drop too much more - even when it starts operating.

 

Phil



On Thu, Oct 25, 2012 at 8:27 AM, Bob Leffler <rv(at)thelefflers.com (rv(at)thelefflers.com)> wrote:

[quote] I set my cowl the same as Dave's a year ago.  Mine hasn't dropped yet.  Although, I'm not flying yet.  



Sent from my iPhone



On Oct 25, 2012, at 6:56 AM, Dave Saylor <dave.saylor.aircrafters(at)gmail.com (dave.saylor.aircrafters(at)gmail.com)> wrote:

 



We set the top cowl 1/8" to 3/16" below the upper edge of the spinner.  It drops down just right.  Don't worry about the gap changing between the spinner and prop.  If you get it right from the start it doesn't change.

   Dave Saylor

[url=tel:831-750-0284]831-750-0284[/url] CL

 



On Thu, Oct 25, 2012 at 3:11 AM, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

 	  Quote: 	
		     --> RV10-List message posted by: "Greg McFarlane" <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>

 

 [Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s regarding the amount the engine/mounts drop/settle after say 100 hours, typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at the back of the spinner is this about the same for the 10 with the 0540. Cheers from Western Australia

    

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=385971#385971

 

 

 

 

 

 

 

 ===========

 " target="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 MS -

 k">http://forums.matronics.com

 ===========

 e -

           -Matt Dralle, List Admin.

 t="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 





3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D



	




[b]

_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

philperry9

Joined: 23 Nov 2011
Posts: 381

Posted: Thu Oct 25, 2012 6:07 am Post subject: Engine Mount Slump

As long as we see it sitting proud at OSH.



On Thu, Oct 25, 2012 at 9:00 AM, Bob Leffler <rv(at)thelefflers.com (rv(at)thelefflers.com)> wrote:

 [quote]Hung the engine 2/5/11.  Cowl was fitted four weeks later. So it's been about 20 months with no drop.  So when you see the hub sitting 1/8" proud at OSH, you'll know why.  

 

Sent from my iPhone



On Oct 25, 2012, at 9:33 AM, Phillip Perry <philperry9(at)gmail.com (philperry9(at)gmail.com)> wrote:

I'm interested in knowing how long the engine hung on the mount before the cowling was fitted; then what the drop results were.

 

Mine has been hanging for nearly a year and I can't imagine getting it to drop too much more - even when it starts operating.

 

Phil





[b]

ScooterF15

Joined: 19 Jun 2006
Posts: 136

Posted: Thu Oct 25, 2012 7:48 am Post subject: Engine Mount Slump

I set mine up 3/8 inch. At 200 hours spinner is level with the cowl.



-Jim

N312JE



On 10/25/12, Greg McFarlane <grbcmcfarlane(at)gmail.com> wrote:

 	  Quote: 	
		   



 [Rolling Eyes] Just fitting top cowl, what is the experience of flying RV10s

 regarding the amount the engine/mounts drop/settle after say 100 hours,

 typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at

 the back of the spinner is this about the same for the 10 with the 0540.

 Cheers from Western Australia





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=385971#385971




	


-- 

Sent from my mobile device

ScooterF15

Joined: 19 Jun 2006
Posts: 136

Posted: Thu Oct 25, 2012 7:49 am Post subject: Engine Mount Slump

Correction 3/16 inch.



-Jim



On 10/25/12, James McGrew <jsmcgrew(at)alum.mit.edu> wrote:

 	  Quote: 	
		   I set mine up 3/8 inch. At 200 hours spinner is level with the cowl.



 -Jim

 N312JE



 On 10/25/12, Greg McFarlane <grbcmcfarlane(at)gmail.com> wrote:

> 

> <grbcmcfarlane(at)gmail.com>

>

> [Rolling Eyes] Just fitting top cowl, what is the experience of flying

> RV10s

> regarding the amount the engine/mounts drop/settle after say 100 hours,

> typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at

> the back of the spinner is this about the same for the 10 with the 0540.

> Cheers from Western Australia

>

>

> Read this topic online here:

>

> http://forums.matronics.com/viewtopic.php?p=385971#385971

>



 --

 Sent from my mobile device




	


-- 

Sent from my mobile device

rv10rob(at)gmail.com
Guest

Posted: Thu Oct 25, 2012 1:28 pm Post subject: Engine Mount Slump

Ours didn't drop any noticeable amount.  We used the Lord mounts (the others weren't available), which I've heard results in less dropping, but you'll find plenty of people that have seen a drop with the Lords, so seems difficult to preduct. 



-Rob



On Thu, Oct 25, 2012 at 8:48 AM, James McGrew <jsmcgrew(at)alum.mit.edu (jsmcgrew(at)alum.mit.edu)> wrote:

 	  Quote: 	
		   --> RV10-List message posted by: James McGrew <jsmcgrew(at)alum.mit.edu (jsmcgrew(at)alum.mit.edu)>

 

 

Correction 3/16 inch.

 

 -Jim

 

 On 10/25/12, James McGrew <jsmcgrew(at)alum.mit.edu (jsmcgrew(at)alum.mit.edu)> wrote:

 > I set mine up 3/8 inch. At 200 hours spinner is level with the cowl.

 >

 > -Jim

 > N312JE

 >

 > On 10/25/12, Greg McFarlane <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)> wrote:

 >> --> RV10-List message posted by: "Greg McFarlane"

 >> <grbcmcfarlane(at)gmail.com (grbcmcfarlane(at)gmail.com)>

 >>

 >> [Rolling Eyes] Just fitting top cowl, what is the experience of flying

 >> RV10s

 >> regarding the amount the engine/mounts drop/settle after say 100 hours,

 >> typically the smaller 0320 & 0360 in sixes etc drop about quarter inch at

 >> the back of the spinner is this about the same for the 10 with the 0540.

 >> Cheers from Western Australia

 >>

 >>

 >>

 >>

 >> Read this topic online here:

 >>

 >> http://forums.matronics.com/viewtopic.php?p=385971#385971

 >>

 >>

 >>

 >>

 >>

 >>

 >>

 >>

 >>

 >>

 >>

 >

 > --

 > Sent from my mobile device

 >

 

 --

 Sent from my mobile device

 

 ===========

 arget="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

 

 



	




-- 

Rob Kochman

RV-10 Flying since March 2011

 Woodinville, WA

 http://kochman.net/N819K



 

  [quote][b]

Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Thu Oct 25, 2012 1:44 pm Post subject: Engine Mount Slump

I'm thinking that the reason some have a little more drop

than others, may be that some people hang their engine and

have it sitting on there for a while during the build and

some get through the cowl fit process quicker.  They must

move down pretty quickly initially, but not move very much

over time after the initial "set".

Tim



On 10/25/2012 4:28 PM, Rob Kochman wrote:

 	  Quote: 	
		   Ours didn't drop any noticeable amount.  We used the Lord mounts (the

 others weren't available), which I've heard results in less dropping,

 but you'll find plenty of people that have seen a drop with the Lords,

 so seems difficult to preduct.



 -Rob

Greg McFarlane

Joined: 12 Apr 2012
Posts: 57
Location: Albany Western Australia

Posted: Fri Oct 26, 2012 3:58 am Post subject: Re: Engine Mount Slump

Thanks for all the replies, will go with Dave's suggestion of 1/8 to 3/16 of an inch, engine has only been on a month so I expect until first start and then first 100 or so hours I will see that expected drop. Apparently static sitting has very little impact on the mounts, which in my case are Lords, it's the flying loads that have the effect, heat and torque loads etc. My local AP (approved person) has said to me that it's much better visually to have the spinner sitting high in relation to the top cowl than the other way around, but as has been said even after some time flying, if you need to "pick up-even out " the set of the spinner to cowls the mounts themselves can be packed with spacers. It's way above my pay scale as well to work any formula for that one, it just goes to show its an art not a science. Cheers again from Western Australia

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Fri Oct 26, 2012 7:37 am Post subject: Re: Engine Mount Slump

Van's instructions say after all of the fitting to install the smaller diameter pins in the top rear hinges. That just gave me another .025" gap at the top rear and lowered the front another 1/16". I ended up with top of cowl 3/16" lower. I had engine hanging very little before fitting cowl. The relative position has not changed, but the cowl hinge eyelets do wear hence the black streaks found after flying occasionally. So I think my cowl has dropped slightly in 88 hours and engine has sagged the same. If everyones stock cowl fits like mine the bottom sticks out below. If I was doing it over, I would keep top rear cowl gap tight with no clearance during fitting. I also would provide 1/4" clearance between spinner back plate and fwd cowl to make removal easier. 1/8" is just too close. I would also cut slot for nose gear leg fairing 2" deeper with removaable piece/nutplates.

_________________
Wayne G.

rv10rob(at)gmail.com
Guest

Posted: Fri Oct 26, 2012 2:54 pm Post subject: Engine Mount Slump

+1 on the spinner/cowl clearance and the larger slot for the gear leg.  I did the latter before paint, but the spinner/cowl gap would have been too much work to fix.



-Rob



 On Fri, Oct 26, 2012 at 8:37 AM, rv10flyer <wayne.gillispie(at)gmail.com (wayne.gillispie(at)gmail.com)> wrote:

 	  Quote: 	
		   --> RV10-List message posted by: "rv10flyer" <wayne.gillispie(at)gmail.com (wayne.gillispie(at)gmail.com)>

 

 Van's instructions say after all of the fitting to install the smaller diameter pins in the top rear hinges. That just gave me another .025" gap at the top rear and lowered the front another 1/16". I ended up with top of cowl 3/16" lower. I had engine hanging very little before fitting cowl. The relative position has not changed, but the cowl hinge eyelets do wear hence the black streaks found after flying occasionally. So I think my cowl has dropped slightly in 88 hours and engine has sagged the same. If everyones stock cowl fits like mine the bottom sticks out below. If I was doing it over, I would keep top rear cowl gap tight with no clearance during fitting. I also would provide 1/4" clearance between spinner back plate and fwd cowl to make removal easier. 1/8" is just too close. I would also cut slot for nose gear leg fairing 2" deeper with removaable piece/nutplates.

  

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 Wayne Gillispie

 

 

 

 

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-- 

Rob Kochman

RV-10 Flying since March 2011

 Woodinville, WA

 http://kochman.net/N819K



 

  [quote][b]

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Sat Oct 27, 2012 4:15 am Post subject: Re: Engine Mount Slump

I guess I will add my two cents.  When I fit the cowling my engine had only been hanging for 2 weeks.  I used a 1/4" gap all around the spinner.  I did not use a prop hub simulator, I used an old hub.  I set the top of the cowl even with the spinners.  After 6 months and 25 hours of flying, the spinner is now 1/8" lower than the top of the cowl.  Most people won't notice it, but I do.  I have acquired spacers that I am going to use at the first annual to raise the engine back up to even.  Some of the slumping occurred prior to flying.

I also added around 2 inches to the opening for the gear leg.  



Something that will ease the cowl removal and install process is to split the inlet baffle for the FAB.  I installed only the lower and side baffles on the "cowl side" of the inlet, and the upper baffle on the FAB box inlet.  That way when it is removed the cowl simply falls away from the baffle on the FAB box.  It makes is much easier to remove the lower cowl.

_________________
Bill
WA0SYV
Aviation Partners, LLC

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