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Rough Babe Bee with Small Diameter Cylinder & Head Assembly Cox_ba12




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Cox Engine of The Month
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"A Space Bug Jr. pulls the Q-Tee up high over Sky Tiger Field"

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Rough Babe Bee with Small Diameter Cylinder & Head Assembly

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Rough Babe Bee with Small Diameter Cylinder & Head Assembly Empty Rough Babe Bee with Small Diameter Cylinder & Head Assembly

Post  Admin Fri Jan 06, 2012 3:48 pm

I won this of eBay a little while ago (last year).

Rough Babe Bee with Small Diameter Cylinder & Head Assembly Imag5011

Rough Babe Bee with Small Diameter Cylinder & Head Assembly Imag5012

Rough Babe Bee with Small Diameter Cylinder & Head Assembly Imag5013

Rough Babe Bee with Small Diameter Cylinder & Head Assembly Imag5014

Rough Babe Bee with Small Diameter Cylinder & Head Assembly Imag5015

It is a little rough but it does seem like it should run. It has a single bypass small diameter Space Bug Jr. cylinder and head. As you can see, someone used a pliers to grip the head and cylinder. The head glows. It has "ok" compression, it could be worse but it could be better. I'm going to run it with the piston that is in it just to see what is gets for RPMs and then I'm going to drop a different piston in it that has a very good fit in the cylinder to see if the RPMs is any better. It has one of its filler tubes broken off but that doesn't affect anything performance wise. It appears to have a dent in the crankcase but there is no dent visible from the inside of the case. I'll try to get a video of it when I start it up sometime this weekend.

Probably overpaid a little, Babe Bees usually go for around $12, but the shipping was cheap. http://www.ebay.com/itm/150724581003?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
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Post  nitroairplane Fri Jan 06, 2012 3:57 pm

Glad to hear you got it and our suspicions were correct.
Hope it makes a good runner and can't wait for the video.
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Post  GermanBeez Fri Jan 06, 2012 3:57 pm

hmmm... do i see a broken off tank nipple?
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Post  nitroairplane Fri Jan 06, 2012 4:09 pm

Yes Jacob mentioned it above Smile
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Post  microflitedude Fri Jan 06, 2012 4:13 pm

That poor thing!
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Post  Ivanhoe Fri Jan 06, 2012 5:33 pm

I was looking at this on EBay, but as usual.....Quote: " Not Available to United Kingdom
See more services See shipping discounts

See all shipping details
Item location: Elk Grove, CA, United States
Ships to: United States See shipping location exclusions"

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Post  microflitedude Fri Jan 06, 2012 5:48 pm

Ivanhoe wrote:I was looking at this on EBay, but as usual.....Quote: " Not Available to United Kingdom
See more services See shipping discounts

See all shipping details
Item location: Elk Grove, CA, United States
Ships to: United States See shipping location exclusions"


Mr. Ron Cribbs, (cribbs74) can buy the item for you, then mail it to you. A very generous offer. Smile
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Post  Admin Sat Jan 07, 2012 5:28 pm

Okay, I (somewhat) ran the engine today. It ran for 30 seconds or so then it slowly slowed down until it stopped. It had no compression until it cooled down (cylinder must have expanded). The engine already had a poor piston and cylinder fit, I do have a piston that fits the cylinder perfectly but I wanted to run it with the original one first. I tried to get a video of it but I stopped the video right when it was slowing down (to play with the needle) the video is only 3 seconds long, I'll rerecord it once I replace the piston and get it going again.




Last edited by Admin on Sat Jan 07, 2012 5:54 pm; edited 1 time in total
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Post  nitroairplane Sat Jan 07, 2012 5:39 pm

Great video Jacob Smile
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Post  Admin Sat Jan 07, 2012 5:39 pm

nitroairplane wrote:Great video Jacob Smile

lol!
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Post  nitroairplane Sat Jan 07, 2012 5:56 pm

But seriously can't wait for the real deal!
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Rough Babe Bee with Small Diameter Cylinder & Head Assembly Empty Re: Rough Babe Bee with Small Diameter Cylinder & Head Assembly

Post  Godsey3.0 Sat Jan 07, 2012 6:14 pm

I noticed that regular cylinders fit my space bug jr. Maybe that is how this one came to be.
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Post  nitroairplane Sat Jan 07, 2012 6:25 pm

Yes we figured it was most likely the only replacement parts the user had.
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Post  SuperDave Sat Jan 07, 2012 6:52 pm

I propose a "Wall of Shame" featuring pictures of abused Cox engines. The one shown would be a good candidate. Shocked Shocked Shocked
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Post  nitroairplane Sat Jan 07, 2012 7:11 pm

There is already one somewhere here Smile
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Post  Admin Sat Jan 07, 2012 7:21 pm

Godsey3.0 wrote:I noticed that regular cylinders fit my space bug jr. Maybe that is how this one came to be.

That's what I figured too. I remember reading (probably on RCU) that after Cox quit carrying the #302 heads, modelers had to replace their cylinders with ones off later engines or ones bought as parts. I also read somewhere that people sometimes find Space Bug Jrs with twin bypass normal dia. cylinders meaning someone replaced that cylinder with one from a Babe Bee sometime down the line for more power as the Space Bug Jr had a single bypass cylinder.
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Post  Mudhen Sat Jan 07, 2012 9:25 pm

.


Last edited by Mudhen on Wed Nov 10, 2021 9:04 am; edited 1 time in total
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Post  nitroairplane Sun Jan 08, 2012 7:07 am

How well does the driveplate fit?
Could it be a little less sloppy?
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Post  SuperDave Sun Jan 08, 2012 8:36 am

nitroairplane wrote:There is already one somewhere here Smile



OK, Indra, where is it located?
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Post  microflitedude Sun Jan 08, 2012 9:22 am

SuperDave wrote:
nitroairplane wrote:There is already one somewhere here Smile



OK, Indra, where is it located?

Here ya go ~

http://coxengineforum.forumakers.com/t247-the-wall-of-shame?highlight=shame
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Post  Admin Sun Jan 08, 2012 11:44 am

Mudhen wrote:
Admin wrote:...It ran for 30 seconds or so then it slowly slowed down until it stopped...
If it does this again with a good cylinder/piston and compression, then it means the crankshaft fit is too tight. In that case, you may have to run it rich, (and cool) for several minutes, wind it up, then quickly slow it down. Keep doing this until it won't slow down and stop.
Mud

It feels as loose as my other crankcase assemblies. When I flipped it over right after it stopped, it was loose and had no compression, you could hear the cylinder leaking every time you turned it over (sounds like a loose glow head). That "loose" moment only lasted until the cylinder cooled down. I dropped a good fitting piston in it this time, see if that fixes the issue...
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Post  Mudhen Sun Jan 08, 2012 12:07 pm

.


Last edited by Mudhen on Wed Nov 10, 2021 9:04 am; edited 1 time in total
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Post  nitroairplane Sun Jan 08, 2012 12:24 pm

Admin wrote:
Mudhen wrote:
Admin wrote:...It ran for 30 seconds or so then it slowly slowed down until it stopped...
If it does this again with a good cylinder/piston and compression, then it means the crankshaft fit is too tight. In that case, you may have to run it rich, (and cool) for several minutes, wind it up, then quickly slow it down. Keep doing this until it won't slow down and stop.
Mud

It feels as loose as my other crankcase assemblies. When I flipped it over right after it stopped, it was loose and had no compression, you could hear the cylinder leaking every time you turned it over (sounds like a loose glow head). That "loose" moment only lasted until the cylinder cooled down. I dropped a good fitting piston in it this time, see if that fixes the issue...

Yeah that is a bad PL fit.
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Post  Admin Sun Jan 08, 2012 5:16 pm

IT RUNS!



Last edited by Admin on Sun Jan 08, 2012 5:29 pm; edited 1 time in total
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Post  nitroairplane Sun Jan 08, 2012 5:17 pm

Well worth $15 I see.
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