The Murphy Builders Site

All,
My kit came with the current solid aluminum tailspring...how many of you are
flying with this part? Is the consensus that this is an inferior spring

Not having ever seen the fiberglass counterpart, can someone tell me
whether this was a solid part, or hollow and formed around a mandrel or
something?
I'm also wondering about the wheel- and fuselage-attach areas and the
reinforcement required when you put bolts through it. Were there any hard-
points imbedded in the lay-ups?

Rob
Rebel 786


On 6/24/2008 11:53 AM, mkimball@gci.net wrote to rebel-builders:

-> FWIW I would recommend S-glass, not the E-glass that you can get at
hardware
-> stores. Probably want to alternate each layer in different directions too.
-> I guess you could use the dimensions of the spring already in use to

-> out how thick to make it. If you really wanted to experiment you might
-> alternate different layers of S-glass with Kevlar, leaving the outside
-> layers in Kevlar for it's impact resistance. I would lean toward a higher
-> percentage of S-glass. But with Kevlar being twice as strong as S-glass
you
-> could make a smaller, lighter tailspring with equal strength if you

-> Or make one with the same dimensions and it will be stronger, lighter, and
-> privide impact resistance to those rocks you're going to through at it.

-> epoxy resin. You shouldn't use polyester resins with Kevlar.
->
-> Mike
-> 044SR
->
-> -----Original Message-----
-> From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Bob
-> Patterson
-> Sent: Monday, June 23, 2008 7:10 PM
-> To: rebel-builders@dcsol.com
-> Subject: Re: [rebel-builders] Rebel tailsprings - was Empty weight
->
->
-> Changed the header - again !
->
-> Yes, it shouldn't be too hard to build fiberglass tailsprings - you
-> could lay up double or triple width & saw them apart ...
->
-> We're not Rambling yet, Tim - we leave July 12th, for a one week
-> trip to Quebec City & Canada'a east coast, if the weather's good ...
-> http://prosumers.ca/Ramble08
->
-> Everyone's welcome - still time to join in !!
->
-> Anna & I will be at Oshkosh, and hope to get together with
-> everybody, as usual ! :-) Maybe we'll try one more time
-> for a get-together at the Beer Tent ....
->
-> --
-> ......bobp
-> bobp@prosumers.ca
-> http://www.prosumers.ca
-> http://bpatterson.qhealthbeauty.com
-> http://apatterson2.qhealthzone.com
-> http://apatterson2.ordermygift.com
->
-> -------------------------------orig.-------------------------
-> On Tuesday 24 June 2008 02:35, Tim Hickey wrote:
-> > Anybody ever try to lay up a fiberglass spring?
-> >
-> > Shouldn't be all that hard. We just need to find an ol VariEze

-> > turn him loose.
-> >
-> > By the way, I will be putting together a master list of those

-> > attend OSH 08 in the next several days. Last year we had a very good
-> > discussion with Mr. Murphy for an hour or so. I hope that we can do so
-> > again.
-> > Bob P. Can you help set this up? ( I think Bob is Rambling, but he will
-> > get this sooner or later.)
-> >
-> > Tim Hickey
-> > R808
-> >
-> >
-> > ----- Original Message -----
-> > From: "Drew Dalgleish" <drewjan@cabletv.on.ca>
-> > To: <rebel-builders@dcsol.com>
-> > Sent: Monday, June 23, 2008 7:35 PM
-> > Subject: Re: [rebel-builders] Empty weight
-> >
->
->
->
->
->
-> -----------------------------------------------------------------
-> List archives located at: https://mail.dcsol.com/login
-> username "rebel" password "builder"
-> Unsubscribe: rebel-builders-unsubscribe@dcsol.com
-> List administrator: mike.davis@dcsol.com
-> -----------------------------------------------------------------
->
->
->




-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------

All,
My kit came with the current solid aluminum tailspring...how many of you
are
flying with this part? Is the consensus that this is an inferior spring
material?
Not having ever seen the fiberglass counterpart, can someone tell me
whether this was a solid part, or hollow and formed around a mandrel or
something?
I'm also wondering about the wheel- and fuselage-attach areas and the
reinforcement required when you put bolts through it. Were there any
hard-
points imbedded in the lay-ups?

Rob
Rebel 786


On 6/24/2008 11:53 AM, mkimball@gci.net wrote to rebel-builders:

-> FWIW I would recommend S-glass, not the E-glass that you can get at
hardware
-> stores. Probably want to alternate each layer in different directions
too.
-> I guess you could use the dimensions of the spring already in use to
figure
-> out how thick to make it. If you really wanted to experiment you might
-> alternate different layers of S-glass with Kevlar, leaving the outside
-> layers in Kevlar for it's impact resistance. I would lean toward a
higher
-> percentage of S-glass. But with Kevlar being twice as strong as
S-glass
you
-> could make a smaller, lighter tailspring with equal strength if you
wanted.
-> Or make one with the same dimensions and it will be stronger, lighter,
and
-> privide impact resistance to those rocks you're going to through at it.
Use
-> epoxy resin. You shouldn't use polyester resins with Kevlar.
->
-> Mike
-> 044SR
->
-> -----Original Message-----
-> From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Bob
-> Patterson
-> Sent: Monday, June 23, 2008 7:10 PM
-> To: rebel-builders@dcsol.com
-> Subject: Re: [rebel-builders] Rebel tailsprings - was Empty weight
->
->
-> Changed the header - again !
->
-> Yes, it shouldn't be too hard to build fiberglass tailsprings - you
-> could lay up double or triple width & saw them apart ...
->
-> We're not Rambling yet, Tim - we leave July 12th, for a one week
-> trip to Quebec City & Canada'a east coast, if the weather's good ...
-> http://prosumers.ca/Ramble08
->
-> Everyone's welcome - still time to join in !!
->
-> Anna & I will be at Oshkosh, and hope to get together with
-> everybody, as usual ! :-) Maybe we'll try one more time
-> for a get-together at the Beer Tent ....
->
-> --
-> ......bobp
-> bobp@prosumers.ca
-> http://www.prosumers.ca
-> http://bpatterson.qhealthbeauty.com
-> http://apatterson2.qhealthzone.com
-> http://apatterson2.ordermygift.com
->
-> -------------------------------orig.-------------------------
-> On Tuesday 24 June 2008 02:35, Tim Hickey wrote:
-> > Anybody ever try to lay up a fiberglass spring?
-> >
-> > Shouldn't be all that hard. We just need to find an ol VariEze
builder and
-> > turn him loose.
-> >
-> > By the way, I will be putting together a master list of those
planning to
-> > attend OSH 08 in the next several days. Last year we had a very good
-> > discussion with Mr. Murphy for an hour or so. I hope that we can do
so
-> > again.
-> > Bob P. Can you help set this up? ( I think Bob is Rambling, but he
will
-> > get this sooner or later.)
-> >
-> > Tim Hickey
-> > R808
-> >
-> >
-> > ----- Original Message -----
-> > From: "Drew Dalgleish" <drewjan@cabletv.on.ca>
-> > To: <rebel-builders@dcsol.com>
-> > Sent: Monday, June 23, 2008 7:35 PM
-> > Subject: Re: [rebel-builders] Empty weight
-> >
->
->
->
->
->
-> -----------------------------------------------------------------
-> List archives located at: https://mail.dcsol.com/login
-> username "rebel" password "builder"
-> Unsubscribe: rebel-builders-unsubscribe@dcsol.com
-> List administrator: mike.davis@dcsol.com
-> -----------------------------------------------------------------
->
->
->




-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------