stunthanger.com

Building Tips and technical articles. => Building techniques => Topic started by: Ron Merrill on February 19, 2008, 01:49:48 PM

Title: RC Mounts
Post by: Ron Merrill on February 19, 2008, 01:49:48 PM
In our end of the sport, do a lot of people use these ??? Is there an advantage to using one over the beam mount? Never used one and was just wondering if i was missing out on something. y1  THANKS in advance. Ron.
Title: Re: RC Mounts
Post by: Will Hinton on February 19, 2008, 02:38:14 PM
I have used R/C mounts on several stunters.  When I started using the 46VF's in the mid-nineties I went to soft mounts and used the typical r/c mount with the soft mount bushings.  I shaved two ounces off the nose weight by thinner woods, etc because I felt with the reduced vibration I didn't need the strength that hard mounts required.  Did it help?  I dunno.  I flew the original Ephesian three years with no ill effects.  BUT- was I simply overbuilding before ?  Maybe.
I went to radial r/c mounts with NO soft mounting later with a couple of my PA's when I went up to the 61 & 65.  They worked fine and both ships done that way had many flights on them.  I think I saved one ounce nose weight in those.
However - (you knew there'd be a "However" didn't you?)  With judicious building throughout the whole ship I have used beam mounts for the last three serious ships while keeping the weoght very respectable and have suffered no problems at all.  Weight can be kept down with either method of building and I see no advantage of one over the other to be perfectly framk about it.
Blessings,
Will
Title: Re: RC Mounts
Post by: john e. holliday on February 19, 2008, 04:26:25 PM
Where the Hutch at (Don that is).  In his Stearman there is no motor mounts.  The plane he built and published had no motor mounts as such.  Seems he grinds of the mounting lugs of the engine.  Makes a back plate mount and uses longer screw for mounting to the back of the engine.  I would do it bit am afraid of messing up a good engine.  DOC Holliday
Title: Re: RC Mounts
Post by: Bill Little on February 19, 2008, 05:34:42 PM
Where the Hutch at (Don that is).  In his Stearman there is no motor mounts.  The plane he built and published had no motor mounts as such.  Seems he grinds of the mounting lugs of the engine.  Makes a back plate mount and uses longer screw for mounting to the back of the engine.  I would do it bit am afraid of messing up a good engine.  DOC Holliday

Hi Doc,

Bob Palmer's MARS has the three bolts for the Fox 35 back plate used as both engine mounts through the firewall and to hold the clips for the nose wheel!  I built ours with a R/C (Kraft Hayes??) mount and used "J" bolts to hold the nose gear.

Ted's Imitation uses a K/H type mount, and Aaron modified his Tutor (original TF kit) to this configuration after the third or fourth rebuild (he was learning! LOL!!).
Title: Re: RC Mounts
Post by: kenneth cook on February 20, 2008, 02:03:49 PM
           I don't know if anyone else has come across this problem. I tried to use the r/c mount on a full fuse plane. The tank plumbing seems to be right in the way. I tried an all tubes fwd and different style wedge but one or more of the tubes are directly in the way of the mount. One option I was going to try was to drill a 5/16 hole through the mount and run right through it. The hole wouldn't interfere with the blind nut I was going to install in the firewall.  Does this sound like a simple fix?   Ken Cook
Title: Re: RC Mounts
Post by: Will Hinton on February 20, 2008, 05:28:59 PM
Ken,
I have used the Sullivan slant tanks since '90 with great results as to ease of plumbing.  However, your possible solution sounds like a good one to me.  Be aware that I drilles my K/H mounts out for the soft mount bushings with no failure of the mount after years of flying those airplanes.  Your drilling a hole should not harm the integrity of the mount at all.
I think you would like the slant tanks though.
Blessings,
Will