Today's Message Index:
----------------------
1. 09:55 AM - Motor Mounts (Peter van Schoonhoven)
2. 10:01 AM - Re: Motor Mounts (Tom Martin)
Message 1
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--> Rocket-List message posted by: Peter van Schoonhoven <pvans@pacifier.com>
Hello Rocket list readers. I am working on a HRII that was partially built
by another person. I am ready to hang the engine on the fuselage.
I have the Harmon engine mount and a Lycoming IO-540 C4B5 that was
overhauled by a reputable shop. But like the Johhny Cash song about the
....49,50,51 Automobile.... when I went to hang it and put the bolts in,
the holes were not there.
It seems the motor mount angles and spacing do not match the mounting ears
on my engine. I have discovered there is a Dynafocal 1 and 2, and the
mounting holes in the engine ears come large and small. The mounting ears
on my engine are Lycoming 70456, and it seems that all the RV-10 builders
want them. But I want to be sure I end up with mounting ears that work for
me in exchange.
Question for the group: What part number Lycoming ears fit the Harmon
engine mount? Are you using the larger or smaller diameter Lord mounts? I
heard the small diameter were the aerobatic and stiffer mounts, but that
may be wrong.
Thanks in advance for your advice.
Regards,
Peter
HRII in the works, RV3 and C-210 to fly now
Message 2
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--> Rocket-List message posted by: "Tom Martin" <fairlea@amtelecom.net>
Peter
You need the Lycoming ears that have the large hole. Start calling
around to aircraft salvage yards. Ask for the large size holes, the same
mounting ears that are used on a Piper Aztec. The engine is a C4B5. They
will know which ones.
I paid $90US each for the last ones that I purchased from Bobby's
planes and parts in Texas.
Tom Martin
-----Original Message-----
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Peter van
Schoonhoven
Subject: Rocket-List: Motor Mounts
--> Rocket-List message posted by: Peter van Schoonhoven
<pvans@pacifier.com>
Hello Rocket list readers. I am working on a HRII that was partially built
by another person. I am ready to hang the engine on the fuselage.
I have the Harmon engine mount and a Lycoming IO-540 C4B5 that was
overhauled by a reputable shop. But like the Johhny Cash song about the
....49,50,51 Automobile.... when I went to hang it and put the bolts in,
the holes were not there.
It seems the motor mount angles and spacing do not match the mounting ears
on my engine. I have discovered there is a Dynafocal 1 and 2, and the
mounting holes in the engine ears come large and small. The mounting ears
on my engine are Lycoming 70456, and it seems that all the RV-10 builders
want them. But I want to be sure I end up with mounting ears that work for
me in exchange.
Question for the group: What part number Lycoming ears fit the Harmon
engine mount? Are you using the larger or smaller diameter Lord mounts? I
heard the small diameter were the aerobatic and stiffer mounts, but that
may be wrong.
Thanks in advance for your advice.
Regards,
Peter
HRII in the works, RV3 and C-210 to fly now
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