Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Cox Medallion .015 Needle Valve Extension Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
August-2019
fredvon4's

"Tee Dee .049"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


Cox Medallion .015 Needle Valve Extension Empty
World of Aviation

Cox Medallion .015 Needle Valve Extension

Go down

Cox Medallion .015 Needle Valve Extension Empty Cox Medallion .015 Needle Valve Extension

Post  Iceberg on Thu Apr 18, 2019 12:06 am

Cox Medallion .015 Needle Valve Extension _015_n10
I have a new .015 that runs to say the least pretty good! It spins the 8x4 nicely at just over 14,000. All good. However I feel that the needle could have some kind of an extension? Just to keep the fingers a little further away? The exhaust coming out is hot enough you need gloves just to adjust it while running. But if a hose or other idea works maybe good like the Testors had a wire and lead metal bead at the end?

Any suggestion?

Thanks
Iceberg
Iceberg
Iceberg
Gold Member
Gold Member

Posts : 134
Join date : 2018-11-03
Location : Anseong Korea at the moment

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  KariFS on Thu Apr 18, 2019 12:47 am

I don't remember if the Medallion .15 needle has a hollow end, but the Tee Dee one does. My Tee Dee has an extension added by a previous owner. It is just a simple piano wire, maybe 1/16" or so, with a loop in its end, and the other end is soldered into the hollow end of the needle. I don't have a picture of it but will post one this evening.

EDIT: Found a pic that sort of shows it. The picture is a link to a bigger file.

Cox Medallion .015 Needle Valve Extension 14254490.t

If the needle is not hollow, maybe a plastic tube would work, like the one on Killer Bees and some prduct engines? Many prefer plastic, because a steel wire might pick up vibrations and start to rotate by itself.


Last edited by KariFS on Thu Apr 18, 2019 12:55 am; edited 2 times in total
KariFS
KariFS
Diamond Member
Diamond Member

Posts : 1539
Join date : 2014-10-10
Age : 47
Location : Finland

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  Iceberg on Thu Apr 18, 2019 12:53 am

Hi
It is hollow like the teedee also. Maybe as you say the metal one might have a tendency to auto rotate. That .15 is one mean machine. The tube approach maybe better?
Thanks
Ice
Iceberg
Iceberg
Gold Member
Gold Member

Posts : 134
Join date : 2018-11-03
Location : Anseong Korea at the moment

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  Levent Suberk on Thu Apr 18, 2019 6:21 am

A slot can be opened on needle valve for a screwdriver. I didn't try it but it can work. Dremel cutting disk is useful to make a slot.

Note: A screwdriver for this purpose can be made with a piece of piano wire.


Last edited by Levent Suberk on Thu Apr 18, 2019 7:16 am; edited 1 time in total (Reason for editing : Adding note)
Levent Suberk
Levent Suberk
Gold Member
Gold Member

Posts : 368
Join date : 2017-12-24
Location : Turkey

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  aspeed on Thu Apr 18, 2019 10:27 am

You can always plug up the needle hole and use a remote needle. I have screwed in a nylon plug, or soldered the hole shut in some cases. Often I get motors with needles or even carbs missing.
aspeed
aspeed
Gold Member
Gold Member

Posts : 268
Join date : 2013-01-18
Location : Leamington Ont. Can.

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  KariFS on Thu Apr 18, 2019 2:42 pm

Ice, it just occurred to me that some engines have a piece of cable as a needle valve extension. You know, something like a bike brake or clutch cable with a knob on one end and the needle in the other. It probably vibrates somewhat, but, being flexible, maybe it won’t transfer the vibration into the needle valve itself? And it is definitely crash resistant too, unlike a long rigid needle extension.
KariFS
KariFS
Diamond Member
Diamond Member

Posts : 1539
Join date : 2014-10-10
Age : 47
Location : Finland

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  coxaddict on Thu Apr 18, 2019 3:05 pm

I like to cut my needle body down, drill and tap for a socket head screw and use a ball end hex driver to adjust the needle setting. You could do something similar and epoxy or solder a socket head screw into the hollow of a shortened needle body. This keeps your fingers away from the spinning prop and by shortening the body helps minimize the needle bounce. See my avatar for an example.
coxaddict
coxaddict
Gold Member
Gold Member

Posts : 281
Join date : 2013-01-27
Location : north shore oahu, Hawaii

View user profile

Back to top Go down

Cox Medallion .015 Needle Valve Extension Empty Re: Cox Medallion .015 Needle Valve Extension

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum