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Rocket engine mounts.


Marek7

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Hmmmm....

Great question!

One part Cessna power plant...

One part Continental Motors Inc...

One part Rocket engineering...

One part Lord engine mounts...

Add all that together... Dan at Lasar probably knows the answer...?

If not Dan, Rocket Engineering is a great resource...

Best regards,

-a-

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39 minutes ago, carusoam said:

Hmmmm....

Great question!

One part Cessna power plant...

One part Continental Motors Inc...

One part Rocket engineering...

One part Lord engine mounts...

Add all that together... Dan at Lasar probably knows the answer...?

If not Dan, Rocket Engineering is a great resource...

Best regards,

-a-

Would you have contact info. Whenever I call rocket I get the machine. 

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Unfortunately, I do not have any recent contact info... As my Rocket engineering project became fully owned by Mooney over time...

is your contact info the same as their public website?

https://rocketengineering.com/contact-rocket-engineering/

There service letters list the same contact info...

https://rocketengineering.com/wp-content/uploads/2017/12/SIL_01-560-04.pdf

https://rocketengineering.com/jetprop-service-letters/

Best regards,

-a-

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33 minutes ago, carusoam said:

See if Erik @aviatoreb can be helpful with the engine mount question for a Rocket?

Best regards,

-a-

Did somebody call?

I did replace my engine mounts when I first bought my airplane, just shy of ten years ago.  The engine was just generally sagging a little.  And at that time I did a bunch of things to improve the general maintenance of the airplane.  So I cannot remember much about part numbers and so forth.  I want to say there might be part numbers stamped onto the mounts.  But generally on such things we tend to call rocket engineering for part numbers when we cannot find them.  They have been incredibly helpful - but I hate to bother them unless I really need to.

However, I do have some part manuals and I will look through them tonight and see if I can round up a part number for you.

E

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I had the honor of speaking with these fine people at KOSH...

I have the beer opener and key chain to prove it...

Unfortunately, none of the freebies have contact info on it...

But I assure you, their website does...

https://www.lord.com/products-and-solutions/vibration-and-motion-control/aerospace-and-defense/fixed-wing/fw-engine-mounts

It probably will take about five minutes for them to find what has been documented for the Rocket’s mounts...

Instead of grabbing freebies and discussing engine mounts, I probably should have focused on some polymer technologies to improve the existing landing gear donuts...  :)

Best regards,

-a-

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Rocket did have the part number of course which I will post when my AME gets it to me.

I was curious:  What would be the failure mode of one of these mounts?  I don't seem to have any engine sag but the rubber is indeed cracked.

Mark

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Like all rubber donuts...

Age, warmth, ozone environment, combined with compression under weight and vibration....

Rubber is a highly crosslinked polymer... long chains with many inter connects... but not too many to become solid...

Essentially, the Rubber literally flows outward, slowly... called creeping flow...

Briefly they degrade over time... whether they get squished and flow out, or dry rot, they lose the ability to perform...

Fortunately, with engine mounts there is a way to add back some shims to improve things...

But there is nothing like new donuts...

Engine mounts or suspension donuts... newer is better...   :)

PP thoughts, not a mechanic...

Best regards,

-a-

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