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Cox Engine of The Month
July-2024
robot797's
![](https://i.servimg.com/u/f95/15/46/86/41/3_robo10.jpg)
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
robot797's
![](https://i.servimg.com/u/f95/15/46/86/41/3_robo10.jpg)
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
Space Bug Jr. - Trying to determine just how stupid I want to get
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Page 2 of 2 • 1, 2
Re: Space Bug Jr. - Trying to determine just how stupid I want to get
rdw777 wrote:You bet, Will make a couple up…. The photo shows the front end of SBJ with the 5-40 nut on… I happen to have one
…. I tried to scheme out a flywheel but no bueno…. Maybe a local machine shop could make them…
I mentioned earlier; the Dumas model boat running-hardware kits for 1/2A glow power.. and asked about the SB/SBJ thread-pitch on the output-shaft. Bob confirmed the 5-40.. as is in all the later Cox .049/.051 engines. The Dumas kits came with the flywheel.. (#6 center-hole must be bushed for 5-40 to avoid eccentricity leading to imbalance) and includes a Universal-joint which is internally threaded 5-40 in the hex-end.. and includes a steel shaft; threaded to mate with the u-joint's opposite end. These kits were complete... and some were meant for installation in their then; "Atlas Van-Lines" Hydroplane kit for either "free" or "tether" running.
Some photos..
the Dumas U-joint/flywheel assy that came in my kit # 2306
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 Dumas_17](https://i.servimg.com/u/f76/18/50/45/90/dumas_17.jpg)
an example photo from the web, showing installation on a Babe Bee.. to power a Dumas AVL Hydro (18" length)
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 Dumas-10](https://i.servimg.com/u/f76/18/50/45/90/dumas-10.jpg)
Dumas still offers those kits..
https://www.dumasproducts.com/?product=running-hardware-kit-2314-for-1209-1410-1411-1422
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 Dumas_18](https://i.servimg.com/u/f76/18/50/45/90/dumas_18.jpg)
I have 5-40 hex-nuts that I can send to Bob.. which might help to fit a flywheel/U-joint assy. from that Dumas running hdwe. kit.
rsv1cox- Top Poster
Posts : 10851
Join date : 2014-08-18
Location : West Virginia
Re: Space Bug Jr. - Trying to determine just how stupid I want to get
I got the Franken Space Bug/Space Bug Jr. together this morning using Mudhen's crankshaft, Space Bug crankcase, and SB Jr.'s plastic tank and accessories. Mud sent a new prop drive washer too which I pulled on with a couple of toothpicks and nuts. Not fun getting those little ground off 2/56 nuts back on the bolts.
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 P1016780](https://i.servimg.com/u/f43/19/15/28/33/p1016780.jpg)
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 P1016777](https://i.servimg.com/u/f43/19/15/28/33/p1016777.jpg)
After I tightened the head I got a nice "it's going to run" pop flipping the yellow safety tipped prop.
Yesterday I ordered a bunch of parts from both Bernie and Matt. Got to wait on assembling the "authentic" SB Jr. until I get new case gaskets.
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 P1016781](https://i.servimg.com/u/f43/19/15/28/33/p1016781.jpg)
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 P1016780](https://i.servimg.com/u/f43/19/15/28/33/p1016780.jpg)
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 P1016777](https://i.servimg.com/u/f43/19/15/28/33/p1016777.jpg)
After I tightened the head I got a nice "it's going to run" pop flipping the yellow safety tipped prop.
Yesterday I ordered a bunch of parts from both Bernie and Matt. Got to wait on assembling the "authentic" SB Jr. until I get new case gaskets.
![Space Bug Jr. - Trying to determine just how stupid I want to get - Page 2 P1016781](https://i.servimg.com/u/f43/19/15/28/33/p1016781.jpg)
rsv1cox- Top Poster
Posts : 10851
Join date : 2014-08-18
Location : West Virginia
rsv1cox- Top Poster
Posts : 10851
Join date : 2014-08-18
Location : West Virginia
Re: Space Bug Jr. - Trying to determine just how stupid I want to get
That rubber tipped key chain thingy, got the same from Bernie for an order I placed not long ago. It is a touch pointer clicker for a cellphone or tablet touch screen.
GallopingGhostler- Top Poster
Posts : 5432
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Space Bug Jr. - Trying to determine just how stupid I want to get
GallopingGhostler wrote:That rubber tipped key chain thingy, got the same from Bernie for an order I placed not long ago. It is a touch pointer clicker for a cellphone or tablet touch screen.
Thanks George, just got back from an early morning shopping trip and picked it up........pressed the black rubber tip and .... "Well, it's not a flashlight or lazer pointer".........
![Huh...](/users/3015/29/34/60/smiles/3929217648.gif)
rsv1cox- Top Poster
Posts : 10851
Join date : 2014-08-18
Location : West Virginia
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![-](https://2img.net/i/empty.gif)
» Is there a definitive way to determine if ...................
» Determine engine wear?
» Space Bug, Space Bug Jr. and Stepped cylinder Babe Bee weights.
» Stupid Elm
» Screw sets for Cox 049 Thermal Hopper - Space Hopper - Space Bug
» Determine engine wear?
» Space Bug, Space Bug Jr. and Stepped cylinder Babe Bee weights.
» Stupid Elm
» Screw sets for Cox 049 Thermal Hopper - Space Hopper - Space Bug
Page 2 of 2
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