Jump to content

Long-EZ O-320 engine mount question


Recommended Posts

I need a set of Dynafocal "sandwich" style rubber engine mounts for a Long-EZ with E2D Lycoming O-320. The existing ones are worn and unusable, markings unreadable.

Spruce lists "50402-5 ASSY" as "used on many homebuilts including the Defiant and Long-EZ":
https://www.aircraftspruce.com/catalog/eppages/dynosandwich.php

VIP Mounts website indicates "VIP 50402-5" are similar to "Lord J-7402-16" and "Barry 94150-01".
https://vipmounts.com/aircrafts-mounts/

Is "VIP 50402-5" the right choice?
 

vip_mounts.png

Link to comment
Share on other sites

As I understand it, the airplane manufacturers specify very slight differences in rubber composition for vibration control and that's why there are so many different mounts.   I think most of us the J-7402-X version sold by Spruce for the O-320s.  Just check that your dynafocal cups are the 2 3/4" size.  I imagine any isolator for an O-320 engine would work just as well.  You might find some on ebay but I'd avoid really old ones.  A few years ago, I swapped my top and bottom isolators.  Yeah, I am cheap.  This PDF gives some info on sizes.

https://www.herberaircraft.com/documents/categories/LORD_Engine_Mounts_General_Aviation.pdf

-Kent
Cozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold

Link to comment
Share on other sites

  • 2 weeks later...
Quote

This design has the inner part rubber coat filled with some kind of gel or memory foam or whatever it is 🤷‍♂️

Yeah, I've seen that before.  It must have some vibration-control function but I bet it is minimal.  The two rubber donuts are clamped together on the steel center bushing that is inside the rubbery stuff so I expect most of the flexing is in the larger donuts.  I think I have seen Vans owners asking about the "rubbery material leaking out of [my] engine mounts".  🙂  Nothing to fret over, I guess.

-Kent
Cozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information