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Lenny Iszak
Joined: 23 Mar 2008
Posts: 270
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 Posted: Sat Nov 05, 2016 8:22 am Post subject: Lord -20 vs -28 vibration mounts |
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I recently balanced my prop, and it's down to 0.01 IPS now but i still get some vibration that makes the sun visors shake more than I like.
Turns out my VIP mounts have compressed some and there's a gap between the vibration mount and the engine mount. Unfortunately I didn't take a picture but it looks similar to this:
http://i60.tinypic.com/2vkxq2u.jpg
Has anyone had this issue before?
I was looking into getting new Lord mounts. Van's sells them for around $125 a piece, they are J-3804-20.
Lord also has a J-3804-28 model with silicone filled spacers that supposedly help startup and shutdown engine shaking. Sounds great, but the price is $246.95 at AircraftSpruce.
Is anyone using these 28s, and are they worth double the money?
Thanks,
Lenny
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philperry9
Joined: 23 Nov 2011
Posts: 380
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| Posted: Sat Nov 05, 2016 9:07 am Post subject: Lord -20 vs -28 vibration mounts |
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We have a -8 with a 540 on it in the hangar now for annual. The mounts on it were in need of replacement too.
We talked to Lord about this same question and they initially gave us replacement part numbers with the updated elastomer and isn't realize it. We were confused because the parts we had in hand were a different part number.
After placing another call to Lord, we realized that we had the old elastomer part (and numbers). He said that, when they could, they're directing people to the new elastomer because of longevity.
Apparently it doesn't break down as quickly with heat and chemicals; where the rubber apparently does.
I have no real world experience with it beyond that. But did find the exercise enlightening. Whether it plays out in the long run or not remains to be seen....
Phil
Sent from my iPhone
| Quote: | On Nov 5, 2016, at 11:22 AM, Lenny Iszak <lenard(at)rapiddecision.com> wrote:
I recently balanced my prop, and it's down to 0.01 IPS now but i still get some vibration that makes the sun visors shake more than I like.
Turns out my VIP mounts have compressed some and there's a gap between the vibration mount and the engine mount. Unfortunately I didn't take a picture but it looks similar to this:
http://i60.tinypic.com/2vkxq2u.jpg
Has anyone had this issue before?
I was looking into getting new Lord mounts. Van's sells them for around $125 a piece, they are J-3804-20.
Lord also has a J-3804-28 model with silicone filled spacers that supposedly help startup and shutdown engine shaking. Sounds great, but the price is $246.95 at AircraftSpruce.
Is anyone using these 28s, and are they worth double the money?
Thanks,
Lenny
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=462015#462015
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http://www.matronics.com/Navigator?RV10-List |
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