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Post  mitchg95 Thu Feb 23, 2012 10:33 pm

hi, i have always wanted to do a geared twin with baby bee .049's, my uncle has a drill press that i can use. i have no idea how to make a geared twin and would love to make one at some point, i have 2 parts baby bee's that i can overhaul and use for this project. i have seen other geared twins, can someone please give me some tech info of one of these geared twin .049's and also how to make one
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Post  nitroairplane Fri Feb 24, 2012 1:59 am

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Post  John Goddard Fri Feb 24, 2012 2:33 am

nitroairplane wrote:All you need to know.
http://www.rcuniverse.com/forum/m_1199286/mpage_1/key_/tm.htm

Big Phil says whatever 'they' all say the gears have to be twice as thick and hardened.
Very Happy
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Post  nitroairplane Fri Feb 24, 2012 2:37 am

Rc car gears are pretty thick and hardened.
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Post  John Goddard Fri Feb 24, 2012 7:50 am

nitroairplane wrote:Rc car gears are pretty thick and hardened.

Didn't know you were into cars Indra, Ofna Twin Titan any good to you?
I think I only ran once before I took it apart.
Embarassed
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Post  Cribbs74 Fri Feb 24, 2012 8:20 am

nitroairplane wrote:All you need to know.
http://www.rcuniverse.com/forum/m_1199286/mpage_1/key_/tm.htm

Good Link Indra,

It looks all well and good, in the RC universe thread the builder said it's more of a novelty engine and I imagine the power output would be less than an .09 due to the increased friction/load. I wonder though if you used some "hot" .049's if it wouldn't be a good runner? Using the KB backplates to run an external tank and the new #4 cylinders, 5 fin hot insert heads or maybe the throttled backplates. I may try this down the road. I guess I should find a small lathe! Would it spin fast enough to make use of the SPI? Hmmm..

Cool stuff!
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Post  engine049 Fri Feb 24, 2012 8:27 am

nitroairplane wrote:Rc car gears are pretty thick and hardened.
1+ lol I love hoe the guy is like "Hey guys-I remember the swap shop at Toledo in 1970(the year my eyes opened) where a gentleman had FOR SALE hand- built engines using Cox parts arranged in flat twin and v-twin configurations built on stock Cox crankcases! As I recall, the price on these jewels was out of my price range, being in the $25 to $30 range! A week's pay for a little motor? Outrageous! Anybody with a CNC machine should be able to knock these out on his lunch hour. JIM "

I know a few really High dollar names in cnc. The notion of making less than 70-400 an hour takes then nauseou Rich bastaz, Then it never ceases to amaze me how much free work people put into this hobby such a dedicated following!
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Post  mitchg95 Fri Feb 24, 2012 9:47 am

nitroairplane wrote:All you need to know.
http://www.rcuniverse.com/forum/m_1199286/mpage_1/key_/tm.htm

thanks for the link, i have book marked it and will use it further down the road if i decide to make one one of these geared twins
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