Cox .049 Glow Heads

Jobe_Pro Wed Mar 14, 2012 12:43 am

Okay I took the cylinder off of my Baby Bee, Golden Bee, Black Widow, and TEE DEE, the only one with any differance that I could see was the TEE DEE,
I always thought the Black Widow shared the TEE DEE Cylinder, but Mine does have a TEE DEE Glow cap on it which has less area in it and therefore one would think more compession?

Would putting the TEE DEE Glow Head on any .049 engine give it more compression hence more power? Huh...

And what was special about the Black Widow?, maybe mine is not a Black Widow? What?

mitchg95 Wed Mar 14, 2012 12:57 am

can you post a pic of the alleged black widow
and also a teedee head is high comp. so i think it might work to give you more power, maybe another more experienced member can chime in on that matter

Jobe_Pro Thu Mar 15, 2012 1:59 pm

Hmm, having a lil trouble posting a pic here, but basically it has the larger 8cc tank in black but the back plate of the tank is the bronze/brass color like the Baby Bee with the 5cc tank had in the early to mid 70's, the crank case is in the usual chrome alum finish, not black like the most Widows are, just like the one in the link below eccept the back plate of the tank, could it be an earlier Black Widow pretty sure its about a 79/80

http://www.ebay.com/itm/Cox-Black-Widow-049-NO-150-RC-Airplane-Engine-New-Box-Manual-Tools-/270932713988?pt=LH_DefaultDomain_0&hash=item3f14d92204

$Cox .049 Glow Heads C:\Users\Bob\Documents\Cox\Cox 049BW$

engine049 Thu Mar 15, 2012 3:29 pm

Various Sources

http://en.wikipedia.org/wiki/Cox_model_engine BELOW

Puffie40 Thu Mar 15, 2012 4:21 pm

Would putting the TEE DEE Glow Head on any .049 engine give it more compression hence more power?

I'm not "Experienced", but the answer is yes. In the Mouse racer article, The author uses Tee Dee heads in his reed valve engines.

The only caution I would suggest is to test the motor with the new head before mounting the engine on the plane, and adjust the copper shims as necessary.

And what was special about the Black Widow?, maybe mine is not a Black Widow?

From wikipedia:

During the 70s a couple of Cox engineers were playing around with different colored Babe Bee and Golden Bee parts and came up with an all black engine with a red spinner. They hopped it up a bit with a dual bypass cylinder from a Medallion, a black Golden Bee tank and a slightly larger (0.062") venturi intake. The Black Widow was born. These engines were marketed as a High Powered Combat Engine. On later Black Widows the red rubber spinner was replaced by a red anodized aluminum Tee Dee style spinner. In the late 1990s some Black Widows were produced with the a dual bypass slit exhaust cylinder. The slit exhaust was to prevent fires. According to an Aeromodeller engine test done in August 1974 the Black Widow on 25% Nitro output power was 0.08 bhp (60 watts) at 15,000 rpm with a max. torque of 6 oz.in at 9,000 rpm

**RknRusty** Thu Mar 15, 2012 5:26 pm

The original Black Widow up through 1996 had a #1 cylinder with deeper ground ports(not taller, just ground deeper into the wall of the cylinder), than the other dual port Bee cylinders. The venturi inlet and outlet behind the reed are the biggest of all tanked Bees. They all used standard compression Bee heads. And as mentioned, the cross vented 8cc tank. That's about it besides being black.

John Goddard Thu Mar 15, 2012 5:32 pm

[quote= In the late 1990s some Black Widows were produced with the a dual bypass slit exhaust cylinder. The slit exhaust was to prevent fires.

I have to confess to thinking Duuuur OK George when I first came across the above.
However, that was before a little 'moment' 2 weekends ago when my sureteestartdee went up in flames for a few seconds
till I threw a blanket on it.
Embarassed

nitroairplane Thu Mar 15, 2012 5:34 pm

lol John

**RknRusty** Thu Mar 15, 2012 5:46 pm

I wondered if it had ever happened to anybody. It would be cool if it happened in the air.

proctor Thu Mar 15, 2012 6:00 pm

John you made my night, don't know why we find other peoples
misfortunes so amusing. I'm moving my bulk fuel out of my test area
though. John

**Cribbs74** Thu Mar 15, 2012 8:18 pm

proctor wrote:John you made my night, don't know why we find other peoples
misfortunes so amusing. I'm moving my bulk fuel out of my test area
though. John

Read his signature! He wasn't joking...........

Thanks John Boy for being the proverbial lab rat......

**RknRusty** Thu Mar 15, 2012 9:48 pm

I took a look at that eBay picture. It looks to me like it has a plastic tank with no cross vents. If it's really new, then it's an Estes parts mix. It has open port exhaust vents.

Jobe_Pro Thu Mar 15, 2012 11:27 pm

So maybe I must of put the TEE DEE head on it at some time, so could ths be an earlier KB or is it a Surper Bee, again it looked like regular porting to me, and the tank ventury appears to be normal, must just be Super Bee, if I drilled out all my regular Bee's ventury's would it do much for them?
Cox .049 Glow Heads Cox049BW

Jobe_Pro Mon Mar 26, 2012 1:33 pm

RknRusty wrote:The original Black Widow up through 1996 had a #1 cylinder with deeper ground ports(not taller, just ground deeper into the wall of the cylinder), than the other dual port Bee cylinders. The venturi inlet and outlet behind the reed are the biggest of all tanked Bees. They all used standard compression Bee heads. And as mentioned, the cross vented 8cc tank. That's about it besides being black.

I'll have to take a micrometer and measure the depth of the cylinder port, because mine would of definatly been a 1978/79 model, and its just regular Aluminuim with a Black Golden Bee tank, by the naked eye it didn't appear to me any deeper then my RC Golden Bee, or my Baby Bee, nor did the venturi inlet, again unless I measure it, maybe it is slightly.

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