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Cox Engine of The Month
JEROBEE electric to TeeDee conversion
Page 2 of 3
Page 2 of 3 • 1, 2, 3
Re: JEROBEE electric to TeeDee conversion
The bumper that was on the car was in a rough state. The formed edge was cracked, the bottom seemed to have been used to stop a belt sander and the whole thing was curved.
The bumper is made from nylon and glueing nylon is not an easy task. Generally, it will only bond with heat. I tried with hot glue but that didn't work. Then I found this loctite Kit. It comes with an activator which seems to be Loctite 770.
This combination of activator and glue works well and according to the package also glues polyethylène and polypropylène.
To straighten the bumper, I used the same glue to stick on a square carbon tube next to the edge.
The body post was cracked where the screw goes but with a tie wrap, that was a quick fix.
The bumper is made from nylon and glueing nylon is not an easy task. Generally, it will only bond with heat. I tried with hot glue but that didn't work. Then I found this loctite Kit. It comes with an activator which seems to be Loctite 770.
This combination of activator and glue works well and according to the package also glues polyethylène and polypropylène.
To straighten the bumper, I used the same glue to stick on a square carbon tube next to the edge.
The body post was cracked where the screw goes but with a tie wrap, that was a quick fix.
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
The front wheels on this car had been replaced. As far as I know, all Jerobees that were made before the Lightning 2000 had the classis rimmed wheels and rubber tyres. This car had the Lightning 2000 wheels without rims but with the rubber Jerobee tyres glued on instead of foam tyres.
This is a period magazine picture of the chassis with electric motor and the classic wheels (in mirror image).
And this is an advert of the Lightning 2000 with the new wheels, oilite bearings and foam tyres
The rubber wheels didn't stick well and were quickly removed without effort. I went shopping on the web to find foam tyres that suited the 35mm wheels. I found and bought these Swiss made tyres
Once received, I had to adapt the tyre width. I stuck some masking tape onto the foam and marked the right witdh. I could easily cut the tyre to size with a cutter knife.
The wheels are secured on the stub axles with E clips. 1 was missing and was replaced by a steel wire. I once bought some new ones; they're the same as the clips fitted to the clutch shaft.
When looking for parts of these cars, it's not good to stick your brains to the name "Jerobee". As they were the pioneers of the 1/12 scale, many dimensions of parts were taken over by Bolink or Associated.
This completed the chassis. Still to fit is the RC gear and the linkages.
Some before/after pictures
This is a period magazine picture of the chassis with electric motor and the classic wheels (in mirror image).
And this is an advert of the Lightning 2000 with the new wheels, oilite bearings and foam tyres
The rubber wheels didn't stick well and were quickly removed without effort. I went shopping on the web to find foam tyres that suited the 35mm wheels. I found and bought these Swiss made tyres
Once received, I had to adapt the tyre width. I stuck some masking tape onto the foam and marked the right witdh. I could easily cut the tyre to size with a cutter knife.
The wheels are secured on the stub axles with E clips. 1 was missing and was replaced by a steel wire. I once bought some new ones; they're the same as the clips fitted to the clutch shaft.
When looking for parts of these cars, it's not good to stick your brains to the name "Jerobee". As they were the pioneers of the 1/12 scale, many dimensions of parts were taken over by Bolink or Associated.
This completed the chassis. Still to fit is the RC gear and the linkages.
Some before/after pictures
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
You are almost done! Great job on the wheels and tires, they turned out excellent.
Cribbs74- Moderator
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Posts : 11907
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: JEROBEE electric to TeeDee conversion
Yes she is looking Good ! I think you got the hard part done now and hopefully the electronics will go smoothly
getback- Top Poster
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Posts : 10442
Join date : 2013-01-18
Age : 67
Location : julian , NC
Re: JEROBEE electric to TeeDee conversion
Thanks for the comments.
The Porsche 917/30 body is rather rough but as it is an original Jerobee body it deserves to be saved. The spoiler is completely detached on the sides and the hole for the rear body is inexistant. I got some plastic sheet from blister packages and glued this on the back of the spoiler near the sides with époxy. the body mounting hole was recreated by pushing a hot brass tube trough the plastic.
I then sprayed red polyurethane paint on the Inside. To straighten and reinforce the rear spoiler, I glued a piece of coroplast on the Inside. To fix the body on the chassis, I used large Lightning 2000 body hair pins.
The Porsche 917/30 body is rather rough but as it is an original Jerobee body it deserves to be saved. The spoiler is completely detached on the sides and the hole for the rear body is inexistant. I got some plastic sheet from blister packages and glued this on the back of the spoiler near the sides with époxy. the body mounting hole was recreated by pushing a hot brass tube trough the plastic.
I then sprayed red polyurethane paint on the Inside. To straighten and reinforce the rear spoiler, I glued a piece of coroplast on the Inside. To fix the body on the chassis, I used large Lightning 2000 body hair pins.
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
SWEET !! That looks nice good job on saving the Porsche Body !! I am taking this all in for when i crash my GTP
getback- Top Poster
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Posts : 10442
Join date : 2013-01-18
Age : 67
Location : julian , NC
Re: JEROBEE electric to TeeDee conversion
Two pages of fascinating reading. Wonderful restoration Lieven.
Interesting/curious stuff here:
http://jerobee.blogspot.com/
Bob
Interesting/curious stuff here:
http://jerobee.blogspot.com/
Bob
rsv1cox- Top Poster
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Posts : 11250
Join date : 2014-08-18
Location : West Virginia
Re: JEROBEE electric to TeeDee conversion
I met Don Mckay at Bladder Grabber 36 or 37 went to his house and had dinner then bought a bunch of his Fast Combat equipment, engines and a few planes...$800 bucks worth cash money
Had every intention to play in the big boy big block fast combat game
Over the course of the evening Don related to me his involvement in the car hobby industry
I still have his e-mail if some one need to ask a specific car question from I think a guy who probably knows
Don does not do forums or very much at all with the interweb
Had every intention to play in the big boy big block fast combat game
Over the course of the evening Don related to me his involvement in the car hobby industry
I still have his e-mail if some one need to ask a specific car question from I think a guy who probably knows
Don does not do forums or very much at all with the interweb
fredvon4- Top Poster
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Posts : 4012
Join date : 2011-08-26
Age : 69
Location : Lampasas Texas
Re: JEROBEE electric to TeeDee conversion
Glad you like it. The body shell is not perfect. The big cracks were repaired with blobs of hot glue to stitch both edges together quickly while holding them with one hand. The plastic and coroplast was glued with 5min époxy.
I remember that Duke Johnson from Washington knows Don McKay as well. It's been a few years now that I didn't read a post from Duke. I hope he's well.
To store my 2 Jerobees, I avoid to put them away sitting on their wheels. Otherwise, this will create flat spots on the foam tyres after a certain period of time. I use toner cartridge cartons for my printer that I adapt. I cut out the cardboard where the wheels go. The cars sit then on the chassis with the wheels free.
I remember that Duke Johnson from Washington knows Don McKay as well. It's been a few years now that I didn't read a post from Duke. I hope he's well.
To store my 2 Jerobees, I avoid to put them away sitting on their wheels. Otherwise, this will create flat spots on the foam tyres after a certain period of time. I use toner cartridge cartons for my printer that I adapt. I cut out the cardboard where the wheels go. The cars sit then on the chassis with the wheels free.
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
For mounting the RC gear, it was more easy to remove the chassis pan and to fit the plastic unit from the electic powered car. The tank fits in the battery bay.
I covered the original servo holes with sheets of coroplast cut to the size of the servos I will use. The servos are then stuck on with double sided tape.
I needed to find a piano wire of the right size to fit into the circlips hole of the throttle ring. Piano wire of 1,5mm is too thick. I started trying to reduce the thickness with sand paper but quickly found out that this would take a week. I looked in my drawers and found a paperclip that fitted and straightened it.
I covered the original servo holes with sheets of coroplast cut to the size of the servos I will use. The servos are then stuck on with double sided tape.
I needed to find a piano wire of the right size to fit into the circlips hole of the throttle ring. Piano wire of 1,5mm is too thick. I started trying to reduce the thickness with sand paper but quickly found out that this would take a week. I looked in my drawers and found a paperclip that fitted and straightened it.
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
This is great. I bought a Bolink Nitro Legends kit a while back. Might build it with my son this summer.
gkamysz- Gold Member
- Posts : 416
Join date : 2018-02-22
Location : Chicagoland
Re: JEROBEE electric to TeeDee conversion
Last edited by OVERLORD on Mon Jun 10, 2019 9:45 am; edited 1 time in total
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
The first test of the engine. The idle revs are on the high side and the clutch remains engaged. There seems to be too much play on the throttle ring. With a closed exhaust gap, the engine still runs happily. The engine revs up very well. What a difference with the Babe Bee!
https://youtu.be/OrnDJz7ga5c
https://youtu.be/OrnDJz7ga5c
OVERLORD- Diamond Member
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Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
that should really scoot / is the cyl worn were the ring goes on ?
getback- Top Poster
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Posts : 10442
Join date : 2013-01-18
Age : 67
Location : julian , NC
Re: JEROBEE electric to TeeDee conversion
Congrats on your mechanical assembly.
Runs hot fast I would use 24% castor and avoid too much reeving since you have no bearings, engine died was lean.
Get it started keep it a bit rich and fun it on the ground to get some airflow fast as you can. Otherwise use a fan
when you are bench testing it for good airflow. Minimize crank case wear is the goal. Is that a 4oz tank?
2oz square should be enough for 14 minutes.
Runs hot fast I would use 24% castor and avoid too much reeving since you have no bearings, engine died was lean.
Get it started keep it a bit rich and fun it on the ground to get some airflow fast as you can. Otherwise use a fan
when you are bench testing it for good airflow. Minimize crank case wear is the goal. Is that a 4oz tank?
2oz square should be enough for 14 minutes.
1/2A Nut- Top Poster
- Posts : 3538
Join date : 2013-10-20
Age : 61
Location : Brad in Texas
Re: JEROBEE electric to TeeDee conversion
Thanks for your commets and advice. It's a 1 Oz tank, as standard.
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
helo let me give u litle trick for tee dee gtp upgrade to egr valve wit gerobee very nice mod in fact way to fast wil post pic of som of my own mod if u want
davidll1984- Diamond Member
- Posts : 2327
Join date : 2020-02-12
Age : 39
Location : shawinigan
davidll1984- Diamond Member
- Posts : 2327
Join date : 2020-02-12
Age : 39
Location : shawinigan
davidll1984- Diamond Member
- Posts : 2327
Join date : 2020-02-12
Age : 39
Location : shawinigan
Re: JEROBEE electric to TeeDee conversion
my is very hard to find dont tink ever see other one like my need new frame old jerobee front suspetion to fragile wil try mod frame for front and rear suspention like on bolink 1980 frame couple part left in my storage room for upgrade
davidll1984- Diamond Member
- Posts : 2327
Join date : 2020-02-12
Age : 39
Location : shawinigan
OVERLORD- Diamond Member
- Posts : 1807
Join date : 2013-03-19
Age : 58
Location : Normandy, France
Re: JEROBEE electric to TeeDee conversion
yes it use sort of pad inside can use strap to my mising its brake pad parts wil build it back to wat it was befor lost corect part cant find it y remeber wat it look like
davidll1984- Diamond Member
- Posts : 2327
Join date : 2020-02-12
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Location : shawinigan
Re: JEROBEE electric to TeeDee conversion
OverLord
I re read this whole thread a few times and don't see where you mention the LH teedee crank shaft needed to make engine run clockwise
I re read this whole thread a few times and don't see where you mention the LH teedee crank shaft needed to make engine run clockwise
fredvon4- Top Poster
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Posts : 4012
Join date : 2011-08-26
Age : 69
Location : Lampasas Texas
Re: JEROBEE electric to TeeDee conversion
in fact yes if look at picturs is lh crank my bad use to cal it cw for clock wise crank ccw for normal rh right hand it my mecanique typical a to z y actual try find right part for him engine is ok good comprestion stil have al of its clutch flyweal parts egr tank ect nead new servo reciver
davidll1984- Diamond Member
- Posts : 2327
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Age : 39
Location : shawinigan
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