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my "twin bee"
Page 1 of 4
Page 1 of 4 • 1, 2, 3, 4 
my "twin bee"
chris74100 Sun Sep 02, 2012 11:14 am
I started the machining of the crankshaft of my twin baby. Here are some pics.
The crankshaft is same as the twin "Gmark"
The crankshaft is same as the twin "Gmark"
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Re: my "twin bee"
fit90 Sun Sep 02, 2012 11:31 am
Sweet! It looks like a lot of work. You must be very patient. Thanks for sharing.
Bob
Bob
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re: great job
happydad Sun Sep 02, 2012 3:35 pm
chris74100 wrote:I started the machining of the crankshaft of my twin baby. Here are some pics.
The crankshaft is same as the twin "Gmark"
great job and thanks again for posting. mitchg95 are you watching this?? happydad
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Re: my "twin bee"
mitchg95 Mon Sep 03, 2012 5:21 pm
happydad wrote:chris74100 wrote:I started the machining of the crankshaft of my twin baby. Here are some pics.
The crankshaft is same as the twin "Gmark"
great job and thanks again for posting. mitchg95 are you watching this?? happydad
i sure am
looks great Chris 
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Re: my "twin bee"
RknRusty Tue Sep 04, 2012 4:42 pm
Those are wonderful skills you posses, Chris. Thanks for sharing it with us.
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chris74100- Silver Member
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Re: my "twin bee"
Cribbs74 Sat Sep 08, 2012 12:28 pm
You have done a really nice job Chris, I do hope you get a video of it running.
Are you planning on doing any work to the tank/intake? I am sure the extra cylinder will require more fuel and air flow.
Ron
Are you planning on doing any work to the tank/intake? I am sure the extra cylinder will require more fuel and air flow.
Ron
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Re: my "twin bee"
chris74100 Sat Sep 08, 2012 12:43 pm
The normaly tank for the baby bee is a 5cc tank. With the twin is a 8cc tank .
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Re: my "twin bee"
Cribbs74 Sat Sep 08, 2012 1:45 pm
chris74100 wrote:The normaly tank for the baby bee is a 5cc tank. With the twin is a 8cc tank .
True, just that the venturi hole and fuel inlet is sized for a single cylinder. It may work fine for two, just thought I would bring it up. It may be something you already thought of anyway.
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Re: my "twin bee"
John Goddard Sat Sep 08, 2012 2:03 pm
cribbs74 wrote:You have done a really nice job Chris, I do hope you get a video of it running.
Are you planning on doing any work to the tank/intake? I am sure the extra cylinder will require more fuel and air flow.
Ron
Agreed on the nice job.
I was wondering about fueling as well
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Re: my "twin bee"
chris74100 Sun Sep 09, 2012 10:47 am
the motor is finished, it more does not remain than to start it
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Re: my "twin bee"
ahrma_581 Sun Sep 09, 2012 11:27 am
Very nice Chris. How about a picture cutting the cylinder threads in the crankcase? Think that would be one of the trickiest parts of the project, both setup and the fine threadform.
Not too late to submit to "Engine of the Month".
What size prop?
Not too late to submit to "Engine of the Month".
What size prop?
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Re: my "twin bee"
RknRusty Sun Sep 09, 2012 11:32 am
Beautiful! I can't wait to see it run.
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Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
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Re: my "twin bee"
chris74100 Sun Sep 09, 2012 11:52 am
the prop is a 8x6 master airscrew, but it's so big, a 7x4 is better
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Re: my "twin bee"
John Goddard Mon Sep 10, 2012 7:50 am
You might not have seen this Chris and may find some of it interesting.
http://modelenginenews.org/cardfile/gm12.html
http://modelenginenews.org/cardfile/gm12.html
Last edited by John Goddard on Wed Sep 12, 2012 6:14 am; edited 1 time in total
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Re: my "twin bee"
ekitten2 Tue Sep 11, 2012 10:05 pm
absolutly beautiful work!! ive oftern thought of doing one aslo esp tp put in a scale rc j 3 cub project ive had in mind for years...now a four cly one would be exelant iffa only i could figger out how to do it
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Re: my "twin bee"
Jason_WI Tue Sep 11, 2012 10:32 pm
Chris,
Are the cylinders threaded into the crankcase?
Jason
Are the cylinders threaded into the crankcase?
Jason
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Re: my "twin bee"
ian1954 Wed Sep 12, 2012 5:21 am
John's link not quite right. Try this.
http://modelenginenews.org/cardfile/gm12.html
http://modelenginenews.org/cardfile/gm12.html
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Re: my "twin bee"
John Goddard Wed Sep 12, 2012 6:15 am
ian1954 wrote:John's link not quite right. Try this.
http://modelenginenews.org/cardfile/gm12.html
Nice one Ian
Welcome to the forum
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Re: my "twin bee"
chris74100 Wed Sep 12, 2012 10:25 am
Jason_WI wrote:Chris,
Are the cylinders threaded into the crankcase?
Jason
Yes threading with the lathe
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Page 1 of 4 • 1, 2, 3, 4
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