COX 09 .. That plug (brand specification) Should be used?

Surfer_kris wrote:Cox made a regular plug for the Queen Bee and the TD .09RC, only problem is that this gives a rather large power loss compared to the regular heads. I have the order number for that plug somewhere, but it is nothing special (as far as I know) just a long reach hot plug.

The only way to avoid this power loss is to use the regular TD head, or a special head that uses Nelson or "Turbo" plugs. The Turbo plug heads used to pop up on ebay some time ago, haven't checked lately.

On the Queen Bee a conversion head with a hot Turbo plug (OS P4) worked well for me.

1/2A Nut wrote:You bough a turbo plug it will not work with your adapter you need a No.7 or No,8 or R5

I can recommend this head adapter as I own one see pics.

http://www.ebay.com/itm/NOS-Charlies-Glow-Head-Adapter-for-Cox-09-Medallion-Engine-RC-FF-CL-airplane/131752000477?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140602152332%26meid%3Da710dfaf26b84222adedf3497d7b67ce%26pid%3D100011%26rk%3D3%26rkt%3D3%26sd%3D371560463337

Also if you are going to post rpm readings please let us know what brand prop and size it was or
your readings mean nothing.
TD .09 Example of Useful Data with the Valentine Turbo Plug Adapter:
APC 6.3x4 Combat Prop / 20% Nitro / 16,300 / .19 hp / 142w / 24oz thrust / 109.6g with prop/spinner.
-Tatone EM-9 Muffler
-High performance crank
-Tarno RC Carb
-Aluminum Carb Body




Note engine in the middle with the Tatone muffler has a Valentines Turbo Head you will see notch
for the cox wrench is smaller. The turbo plug gives very good compression.

Note the Cox High Compression Head has the ring of notches and is not a standard glow plug.
Note that Cox engines do not use spark plugs they use glow plugs.

The Medallion has a Charlie's Head Adapter for reference to the ebay link. I have them for .049, .09 and on one of my TD .15 nicely made adapter.

getback wrote:I think either one would work Ok the one is K&B http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XK%26B+4520+plug.TRS0&_nkw=K%26B+4520+plug&_sacat=0 don't know heat range but the Enya #3 is a hot plug Idea Bar ?? Eric

1/2A Nut wrote:http://www.ebay.com/itm/Cox-074-09-Queen-Bee-Tee-Dee-RC-Airplane-Engine-Glow-Plug-074-09-/281775089031?hash=item419b1aa587:g:UQMAAOSwgQ9V0MxJ




Here you go plenty in stock these are Cox plugs for the .09 RC and the .074 RC engine
Let us know if you find them a improvement.

1/2A Nut wrote:Why cant you get it?? He has a regular site too and will be able to ship to you.


Shipping: $3.95 Standard Shipping | See details

Item location: Southington, Connecticut, United States

Ships to: Worldwide

http://www.exmodelengines.com/

From his main site:
http://www.exmodelengines.com/cox-.09-tee-dee-rc-glow-plug.html

https://www.exmodelengines.com/help.php?section=contactus&mode=update

1/2A Nut wrote:Matt is on this site he runs the shop you can contact him directly to work out something

https://www.coxengineforum.com/privmsg?mode=post&u=39

https://www.coxengineforum.com/u39