stunthanger.com

Building Tips and technical articles. => Building techniques => Topic started by: steve pagano on August 01, 2007, 07:53:35 PM

Title: S.T.51 on an A.R.F. tutor
Post by: steve pagano on August 01, 2007, 07:53:35 PM

I tried to mount my 51 on the tutor and when drilling out the mounts, I did it a little to close to the edge and split the mount HB~> HB~> Any suggestions? Can i go ahead and just mount the engine anyway? and also which is better for the 51 mounts? 4-40's or 6-32's?(i was drilling out the mount to put in 6-32nd blind nuts)

Title: Re: S.T.51 on an A.R.F. tutor
Post by: Andrew Hathaway on August 01, 2007, 08:42:15 PM

6-32's are a bit of overkill with the 51 on the Tutur II.  The fuselage will fail before 4-40's do.  Also some versions of the G51 have the casting on the case that won't clear the head on 6-32 bolts.  I used 4-40's on mine and haven't had a problem.  Depending on how bad the holes broke thru, I'd probably just epoxy a layer of 1/32 ply across the open side of the mounts.

Title: Re: S.T.51 on an A.R.F. tutor
Post by: Bootlegger on August 02, 2007, 02:41:26 PM

 Might try some wooden dowels in the hole(s) that split. I have done this and glued them in with Aliphetic resin (Titebond) and they worked well...

Title: Re: S.T.51 on an A.R.F. tutor
Post by: Jim Oliver on August 02, 2007, 04:56:04 PM

Hardwood dowels where the bolts go thru are a good idea anyway--most of the ARF's have very soft engine mount wood.

Jim

Title: Re: S.T.51 on an A.R.F. tutor
Post by: M Spencer on August 04, 2007, 11:22:08 PM

Fill the odd bit , with ayrldite .and leave it for a week .