Wing Rods

[timmig]

Help!!! I need to find a 12" 11/32 wing rod for a thermal Eagle plane!!! Does anyone know where to find one??? Thank you,
Tim

[Masterpiece]

Hi,

Try NSP, they have carbon fibre rods in 11/32" at $17.00 your money.

http://www.nesail.com/carbonwings.html

Cheers
Glen

[Ollie]

Ejector pins are case hardened (nitrideed) and make the best joiner rods. Just cut the heads off. See:
http://www.ppunch.com/nitrided-ejector-pin-style-ep.asp

[flyingdogtwo]

acp-composites.com 12"x 11/32= $8.00

[dephela]

Stick with steel!

The diameter is marginal for carbon, no calculations, just based on whats been available in carbon for the planes I fly.

[Capn Crunchie]

I agree - stay with steel!

www.dixiepins.com is another good place for ejector pins availble in any diameter you can dream up with. Great service- no minimum and shipping is only the exact postage cost. Very friendly folks on the phone.

Blue skies,
Cap'n Crunchie

[Ollie]

Steel bends and fails gracefully. Carbon snaps. Because of carbon's brittleness it requires a larger safety factor when picking its size. Carbon also must be protected from minor nicks that result in stress concentrations.

[timmig]

WOW--- thanks for the Pins ideas!!! I've ordered steel-- didn't want carbon as I agree too small for the application. How hard are these pins?? (ejector) Can I cut the head off with a dremel or hacksaw???

[targetdrone]

The Majestic uses the same size rod. You should be able to get one from www.laserartco.com The carbon rod from NSP is discontinued.

[ISoar]

Originally posted by timmig
WOW--- thanks for the Pins ideas!!! I've ordered steel-- didn't want carbon as I agree too small for the application. How hard are these pins?? (ejector) Can I cut the head off with a dremel or hacksaw??? The pins are hard, but I've cut harder. I use my Dremel to cut, grind and polish the ends.

You will probably never manage to permanently set a bend in an ejector pin. I replace all my steel rods with them.

[Keitha]

Tim,
On another thread Chevy Pushrods were recommended, However they only come in 5/16" or 3/8". They are strong, cheap, and ready to install. You could possibly use a concentric sleeve for the 5/16" or drill out to fit the 3/8".

good luck,
Keith

[Rick Van Clief]

Checking the Dixie Pins site I notice regular ejector pins and nitrided ejector pins. Which one is recommended?

[ISoar]

Originally posted by Rick Van Clief
Checking the Dixie Pins site I notice regular ejector pins and nitrided ejector pins. Which one is recommended? Nitrided surface with 40-45 Rc hardness core. The hardness of the core is the key!

Ack! Looks like Dixie has changed their specs. One is harder, the other is softer. I'd use another vendor like NTM or Royal... but you might have to purchase a box.

http://www.ntm.com/
http://www.royalpins.com/

[Rick Van Clief]

Thanks. Along these lines, and assuming I go with the non-nitrided Dixie pin (core hardness = 50-52 Rc), for design purposes what is the allowable stress in bending for these things.

[Capn Crunchie]

FWIW

I have checked the hardness of the factory wingrods on my MPX DG 600 and the ASH. They checked out at surface 32-37 Rc . My older LS-3 and LS-7 checked out the same. So one can sorta use this as a benchmark for an idea of what the Rc numbers at the ejector pin places will mean to us. MPX rods DO bend over time! Not a lot, but they do bend. These were heavy ships that were flown on the slope and have endured a few "rough" landings. That is when the bends usually occured though not rendering them unusable.

Blue skies,
Capn Crunchie

[Bsouthwell]

I too have been searching for wingrods. I neeed 10" 11/32 dia. for my Heat Seeker.

I made a big mistake by ordering from Soaring Stuff. I ordered a month ago and still no rods.....I emailed the guy before turkey day and zero response. I guess I am going to go the route of the ejector pins. Probably were he gets them.

Has anybody had trouble with Soaring Stuff? I got a emailed recpt. but nothing else...Maybe I just slipped between the cracks.:mad:

Regards
Bill

[ISoar]

Originally posted by Bsouthwell
Has anybody had trouble with Soaring Stuff? I got a emailed recpt. but nothing else...Maybe I just slipped between the cracks.:mad: You are joking right? Soaring Stuff has such a bad reputation that I'm amazed they are still around. Perhaps they thrive on those that are unaware.

[ISoar]

Originally posted by Rick Van Clief
Thanks. Along these lines, and assuming I go with the non-nitrided Dixie pin (core hardness = 50-52 Rc), for design purposes what is the allowable stress in bending for these things. I'm not in the metal business, but i think those may be too hard.

Last comment I got from a metal wiz was that the 40-45 was "just right".

Again, I'm not an expert on this, hence my suggestion to go elsewhere.

[timmig]

I got GREAT service from Dixie pins!! It's on an earlier thread --pg 1. Just cut the head off with a dremel cut-off disk-- then installed it and flew. VERY hard--- no bend-- maybe the Florida guy who reccomended them knows more about metalurgy?? I found them to be excellent-- and cheap!!

[Bsouthwell]

By ISOAR

You are joking right? Soaring Stuff has such a bad reputation that I'm amazed they are still around. Perhaps they thrive on those that are unaware.


Yup, I was unaware! Going to dispute it with my credit card company. Live and learn:mad:

I will do a search from now on before any purchases or deals.

by timmig

I got GREAT service from Dixie pins!!

Thanks for the recommendation. I'll give them a try.

[Rick Van Clief]

I called Dixie Pins yesterday. The guy I talked with had no information on allowable bending stresses in their pins. Understandable I guess. I'm not sure what an ejector pin is used for but the name suggests they are used to push something out of something which means they only see compressive loads. So there would be no need to know anything about bending. I guess the only thing left is to load one to failure in a lab somewhere which I doubt I will ever do. I guess it's back to trying to fabricate something out of carbon. Such is life

[ejett]

Ejector pins are used to push molded plastic (and maybe metal) parts out of molds.

They are hard to keep wear to a minimum.

EJ