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Cox Engine of The Month
September-2023
balogh's

"Beefed up old stock 290 on my Quickie100 RC after plenty of airtime hours..."

PAST WINNERS
balogh's

"Beefed up old stock 290 on my Quickie100 RC after plenty of airtime hours..."

PAST WINNERS
Giant Baby Bee
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Giant Baby Bee
A while back, I saw on this forum, a picture of a giant Baby Bee that some one had made. I have poked around today to find it and cannot.
Where can I find pictures and details about this engine? Is it Real?
Where can I find pictures and details about this engine? Is it Real?
daviddiag- Silver Member
- Posts : 79
Join date : 2012-04-18
Age : 72
Location : Bradenton, Florida
Re: Giant Baby Bee
The giant Babe Bee is real; http://www.reginaldluycx.be/collectie3.html
There is also a fake image of a large TD that was posted on RCU some time ago...

There is also a fake image of a large TD that was posted on RCU some time ago...

Surfer_kris- Diamond Member
- Posts : 1878
Join date : 2010-11-20
Location : Sweden
Re: Giant Baby Bee
daviddiag wrote: A while back, I saw on this forum, a picture of a giant Baby Bee that some one had made. I have poked around today to find it and cannot.
Where can I find pictures and details about this engine? Is it Real?
Yes, these were posted here a while ago (by me!) The Babe Bee is real, and reputed to run, the giant TD photo is a fake, touch of the Photoshops!
The photos and discussion thread are on here somewhere, but I certainly can't find them at the moment.
Wilf
Ivanhoe- Diamond Member
- Posts : 1752
Join date : 2011-09-30
Location : Northern Ireland
Re: Giant Baby Bee
That is one of the problems with this forum. Don't use the "inside" search feature, set it to "Google". Also there has been plans to split the discussions up a little more by either engine size or so on.
Re: Giant Baby Bee
Ivanhoe wrote:
Yes, these were posted here a while ago (by me!) The Babe Bee is real, and reputed to run, the giant TD photo is a fake, touch of the Photoshops!
The photos and discussion thread are on here somewhere, but I certainly can't find them at the moment.
Wilf
It comes from RCU in 2010 if I remeber correctly, and then pops up every know and then.... http://www.rcuniverse.com/forum/fb.asp?m=10516961
It was published/highlightet as an April fools joke, and there are more details and images here; Info in German


Surfer_kris- Diamond Member
- Posts : 1878
Join date : 2010-11-20
Location : Sweden
Re: Giant Baby Bee
Looking at the reed valve, I have a hard time with it being flexible enough to seal. Oil viscosity and film strength do not scale up!
daviddiag- Silver Member
- Posts : 79
Join date : 2012-04-18
Age : 72
Location : Bradenton, Florida
Re: Giant Baby Bee
You have reeds in full scale 2 stroke engines (motorbikes), it is just a matter of choosing the right material and dimensions.
Surfer_kris- Diamond Member
- Posts : 1878
Join date : 2010-11-20
Location : Sweden
Re: Giant Baby Bee
Surfer_kris wrote:You have reeds in full scale 2 stroke engines (motorbikes), it is just a matter of choosing the right material and dimensions.
Yes, there are two reeds in my Briggs 5HP four stroker.
Re: Giant Baby Bee
That's the fake one from Photo Shop that I talked about above...
Surfer_kris- Diamond Member
- Posts : 1878
Join date : 2010-11-20
Location : Sweden
Re: Giant Baby Bee
i would love to find out if he used a ball and socket or a wristpin to keep the piston on the connecting rod?
it looks to be about 3 times the size of a normal baby bee, wonder what the displacement is?
it looks to be about 3 times the size of a normal baby bee, wonder what the displacement is?
mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 28
Location : Geneva, mn, USA
Re: Giant Baby Bee
i just checked his site, it is 170mm high were as a normal bee is 59mm
so..... 170/59=2.88, so this be is 2.88 times the normal size
gosh it would be fun to hand start that, wonder what size prop it uses?
so..... 170/59=2.88, so this be is 2.88 times the normal size
gosh it would be fun to hand start that, wonder what size prop it uses?
mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 28
Location : Geneva, mn, USA
Re: Giant Baby Bee
Really cool. He wrote that the engine is diabolic loud without muffler
.
He wrote also that everything is exactly the same as in a real cox (apart from the glow plug). Due to this, the engine is about 40% heavier as necsassary, so it was not planned to use it in a flyer. Sadly he sold it to a modeler and journalist to belgium.
The Builder lives in Bochum, just a stone throw away from me
.

He wrote also that everything is exactly the same as in a real cox (apart from the glow plug). Due to this, the engine is about 40% heavier as necsassary, so it was not planned to use it in a flyer. Sadly he sold it to a modeler and journalist to belgium.
The Builder lives in Bochum, just a stone throw away from me

coxaddicted- Gold Member
- Posts : 492
Join date : 2012-07-11
Age : 43
Location : North-Rhine Westphalia, Germany
Re: Giant Baby Bee
coxaddicted wrote:Really cool. He wrote that the engine is diabolic loud without muffler.
He wrote also that everything is exactly the same as in a real cox (apart from the glow plug). Due to this, the engine is about 40% heavier as necsassary, so it was not planned to use it in a flyer. Sadly he sold it to a modeler and journalist to belgium.
The Builder lives in Bochum, just a stone throw away from me.
It can probably power a small ultralight plane

But I can understand why he sold it, there's just NO place to run something like this here without getting arrested for disturbance of peace

GermanBeez- Platinum Member
- Posts : 1167
Join date : 2011-06-15
Location : Bavaria, Germany
Re: Giant Baby Bee
That is an argument

coxaddicted- Gold Member
- Posts : 492
Join date : 2012-07-11
Age : 43
Location : North-Rhine Westphalia, Germany
Re: Giant Baby Bee
mitchg95 wrote:i just checked his site, it is 170mm high were as a normal bee is 59mm
so..... 170/59=2.88, so this be is 2.88 times the normal size
gosh it would be fun to hand start that, wonder what size prop it uses?
That is along one dimension, so displacement (volume) would be the cube of that: i.e., about 24 times using your measurement. So it would be about a 1.17 ci engine.
These days, per RCU recommendations, about your average 'beginner' r/c motor.....

ahrma_581- Gold Member
- Posts : 290
Join date : 2012-03-21
Location : Sonoran desert
Re: Giant Baby Bee
ahrma_581 wrote:mitchg95 wrote:i just checked his site, it is 170mm high were as a normal bee is 59mm
so..... 170/59=2.88, so this be is 2.88 times the normal size
gosh it would be fun to hand start that, wonder what size prop it uses?
That is along one dimension, so displacement (volume) would be the cube of that: i.e., about 24 times using your measurement. So it would be about a 1.17 ci engine.
These days, per RCU recommendations, about your average 'beginner' r/c motor.....![]()
so 1.17ci? holy cow

mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 28
Location : Geneva, mn, USA
Re: Giant Baby Bee
I would love to hear it run.

lousyflyer- Gold Member
- Posts : 342
Join date : 2012-06-25
Age : 63
Location : Garden City Ga
Re: Giant Baby Bee
lousyflyer wrote:I would love to hear it run.![]()
+1
mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 28
Location : Geneva, mn, USA
Re: Giant Baby Bee
Reginald on RC Groups might own that engine. He has a ton of antique and rare engines. I got a few from him this past summer when he was thinning his collection. That is where I got the spark ignition sprotsman from.
Jason
Jason
Jason_WI- Top Poster
Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI
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