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Old 02-20-2018, 07:28 AM
BGordon's Avatar
BGordon BGordon is offline
Join Date: Feb 2009
Location: Burleson, TX
Posts: 92
Default Engine mount clearance

Good morning everyone,
I am hoping to have my engine mount (tail draggin 7) attached to my firewall within the next few days and was wondering. I have seen build websites in which part of the firewall was cut out/grinded down to allow clearance for the landing gear, but I canít seem to find any measurements. Does anyone know where these are, and if they arenít published, what would be an acceptable clearance...1/8, 1/4Ē?
Thanks in advance,
Brandon Gordon
KFWS, Burleson, TX
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Old 02-20-2018, 02:16 PM
n4322b n4322b is offline
Join Date: Jul 2014
Location: Scotland
Posts: 23

The mount, just, goes on to the firewall without modifying the lower part.
Then if you put a flashlight/led light on top of the leg socket on the mount, the resultant illuminated area on the firewall below the socket is the part that needs cut away for the legs.

You can mark it, with a little difficulty, or simply grind the illuminated area. Others used a carbide burr for the job.

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Old 02-20-2018, 06:56 PM
Bob Martin's Avatar
Bob Martin Bob Martin is offline
Join Date: Jan 2005
Location: Richmond, Virginia
Posts: 1,152

Just remember, that whole area gets covered with a fairing.
Bob Martin
RV-6, 0-360 Hartzell C/S, Tip up, 1150+TT
James extended cowl/plenum, induction, -8VS and Rudder. TSFlightline hoses. Oregon Aero leather seats.
D100-KMD150-660-TT ADI2- AS air/oil seperator. Vetterman exhaust with turndown tips.
Louisa, Virginia KLKU N94TB
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