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Mono

 
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erichdtrombley(at)juno.co
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PostPosted: Thu Mar 20, 2025 7:36 am    Post subject: Mono Reply with quote

Pete, I disassemble the unit and attached the spacer to the lower plate with a couple of screws. Even though the spacer is constrained by the dampers I wanted to ensure the spacer wouldn’t shifting laterally over time. If I remember correctly there isn’t much clearance between the lower LG07 plate and the sides of the swing arm. Having added a total of three spaces, they are now split between the upper LG05 and lower LG07 plates. Also, I did make the two new plates slightly wider (fore and aft) to keep the rubber block from creeping over the edge of the spacer.

Ron, I got as close to a 3.1” gap. I wanted to minimize the amount of preload on the rubber block required to achieve the specified dimension of 3.1”. I have the black block.

Erich Trombley
N28ET
Classic Mono 914


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peterz(at)zutrasoft.com
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PostPosted: Thu Mar 20, 2025 9:06 am    Post subject: Mono Reply with quote

Thx for the clarification!

One more question…. The 3.1” static loaded (I would assume), Or unweighted?

Quote:
On Mar 20, 2025, at 11:44 AM, Erich Trombley <erichdtrombley(at)juno.com> wrote:



Pete, I disassemble the unit and attached the spacer to the lower plate with a couple of screws. Even though the spacer is constrained by the dampers I wanted to ensure the spacer wouldn’t shifting laterally over time. If I remember correctly there isn’t much clearance between the lower LG07 plate and the sides of the swing arm. Having added a total of three spaces, they are now split between the upper LG05 and lower LG07 plates. Also, I did make the two new plates slightly wider (fore and aft) to keep the rubber block from creeping over the edge of the spacer.

Ron, I got as close to a 3.1” gap. I wanted to minimize the amount of preload on the rubber block required to achieve the specified dimension of 3.1”. I have the black block.

Erich Trombley
N28ET
Classic Mono 914






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peterz(at)zutrasoft.com
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PostPosted: Thu Mar 20, 2025 3:42 pm    Post subject: Mono Reply with quote

Mine is sagging (with 1/2 tank) down from about 3.0” (based on the retaining bolt ~gaps: I need to measure next time I hang the plane) to its current ~2.65” which is giving me about 12” prop clearance with the xs tail wheel and classic FWF.

I assume Erich has much more prop clearance.

I was also going to screw the spacer to the bottom plate…..and looking it over I guess all that is needed wrt disassembly is to only remove the swing arm pivot bolt (?) to install, so I will also likely go with a single plate with shock holes as per Erich.

My goal is to eliminate the retaining bolt gaps when the plane is static with a full tank. I think I can get away with a single plate on the bottom.

Cheers and thx!
PeteZ

Quote:
On Mar 20, 2025, at 1:06 PM, Peter Z <peterz(at)zutrasoft.com> wrote:

Thx for the clarification!

One more question…. The 3.1” static loaded (I would assume), Or unweighted?

> On Mar 20, 2025, at 11:44 AM, Erich Trombley <erichdtrombley(at)juno.com> wrote:
>
> 
>
> Pete, I disassemble the unit and attached the spacer to the lower plate with a couple of screws. Even though the spacer is constrained by the dampers I wanted to ensure the spacer wouldn’t shifting laterally over time. If I remember correctly there isn’t much clearance between the lower LG07 plate and the sides of the swing arm. Having added a total of three spaces, they are now split between the upper LG05 and lower LG07 plates. Also, I did make the two new plates slightly wider (fore and aft) to keep the rubber block from creeping over the edge of the spacer.
>
> Ron, I got as close to a 3.1” gap. I wanted to minimize the amount of preload on the rubber block required to achieve the specified dimension of 3.1”. I have the black block.
>
> Erich Trombley
> N28ET
> Classic Mono 914
>
>
>
>


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dmac7



Joined: 05 Apr 2019
Posts: 54
Location: Canada

PostPosted: Thu Mar 20, 2025 5:27 pm    Post subject: Re: Mono Reply with quote

Pete see the July 1996 Factory Flyer newsletter Ivan says when shimming the suspension block a max of 1 inch between the top of tire and bottom of fuselage, this with plane rigged but empty. Not sure if this applies to the XS also.

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