I recently replaced the tail spring on Elite 755. MAM did not have any in
stock, and were uncertain when they would be getting a production run heat
treated. It cost the same to heat treat a dozen pieces as it does to do one
spring. There has been different designs made of the tail spring on the Elite.
Including a tube in tube which gave a total thickness of .125 wall which is
what was with my kit. The tail spring on the SR2500 can work, but is
significantly thicker material, and it fits in the swivel ball rear mount (forgot
the proper name). If the moose stinger is used, then that rear mount needs
to be replaced.
Info from MAM on the Elite tail spring specs:
- minimum 1 X .125 wall 4130 or 5130 steel
- the tube needs to be heat treated to 200,000 lbs/psi Ultimate tensile
strength
I opted to use 1 X .156 4130 and upgraded the forward mounting brackets
as well. The original were 1/8" and MAM recommended either 3/16" or 1/4"
stock upgrade. The SR 2500 forward mounting brackets are 1/4 " and have a
different bolt pattern than the Elite.
The heat treating shops wanted $450.00 - $650.00 to do the one piece. It
pays to shop and beg.......... I got it done for $250.00. Thanks goodness for
friends and networking.
The upgrades added approx 1 1/2 lbs to the tail. I find it more positive for
ground handling. (less wiggly)
Gilbert Tessier
Elite 755
On 10/27/2009 2:04 PM,
westcoastkitplanes@gmail.com wrote to rebel-
builders:
-> FWI..... The Elite & SR2500 utilizes Round Tube for a tail spring. The
-> Yukon and Moose have a Solid Round Bar tail spring, also noting that not
too
-> long ago the diameter of the Moose/Yukon tail spring has changed from 1"
to
-> 1 1/16" and gained approx 3" in length.
->
-> The Rebel, Maverick and Renegade Series all use the same Flat Bar tail
-> spring.
->
-> Just in case there was any confusion........ But saying all that, you could
-> use the current Moose/Yukon tail spring in the Elite but you would have to
-> make some minor modifications.
->
-> Just a curious question here Roger.......... Why would you need another
-> Control Column (CC0035-1) ? Email me off list if you don't want to answer
in
-> the forum.
->
->
-> Cheers,
-> Jeff
->
->
-> On Tue, Oct 27, 2009 at 12:18 PM, Ron Shannon
<
rshannon@cruzcom.com> wrote:
->
-> > Several different stock springs can work, depending on your needs and
wheel
-> > selection, etc. I and others have used a 7AC Champ spring -- in my
case,
-> > slightly modified. It's available from several sources, including Aircraft
-> > Spruce. I chose it to work with a pneumatic wheel from Iron Designs
that is
-> > similar to a Scott. Others have made their own from automotive leaf
spring
-> > sets with good results. Let me know if you'd like more info. There's also
-> > quite a bit of discussion on this topic in the message archives.
-> >
-> > Ron
-> > 254R
-> >
-> >
-> > On Tue, Oct 27, 2009 at 12:05 PM, Ron Stahla <
rmstahla@hotmail.com>
wrote:
-> >
-> > >
-> > > Roger,
-> > >
-> > >
-> > >
-> > > It is my understanding that one of the tail springs in the WAG-AERO
-> > catalog
-> > > will work on the Murphy kits. Dom't know the one. Their sales person
-> > > needed the specs and could not get them from Murphy. Maybe
someone could
-> > > help. It would help lots of us.
-> > >
-> > >
-> > >
-> > > Ron Stahla
-> > >
-> >
-> >
-> >
-> >
-> > -----------------------------------------------------------------
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-> >
-> >
-> >
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