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Post by SKR on Jan 1, 2014 16:27:44 GMT -7
Some more work done to my FED. Since my set up is a little different (14T motor pinion) I decided to go with a 22T Crown to see how it does on the top end before I drop down to a 20T. I'll be using a Tjetsgrig 3 ohm armature with Nacho Polymers. All gears are set and lapped in and I'm really happy with how it all meshed together and how smooth it all turns. Just broke in the motor brushes and this one sounds much stronger than my .55 E/T car. I hope to make some passes Saturday night. Here are some more pics of my build: Made this idler post for the 3rd gear. If I need to, I can set the lash of the 3rd gear by loosening up the screws underneath and sliding back or fourth.    Drilled a few holes on the bottom to cool my muffler bearings   Paint guys went after the screws and I quote "red screws are quicker".   Used a BSRT drill gear jig to lighten up the idler.  |
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Post by pceng on Jan 4, 2014 11:18:31 GMT -7
Hey Sam,
Got chance to see new pics on something bigger than my phone. Great workmanship, love the clean look of it.
Been trying to figure out the rear cluster for some time. And holding off on doing anything. Your pic of small brass gear inside of top cluster gear brought it all together for me. Took a load off my mind for sure. Can't thank you enough, but THANKS AGAIN!!
The ECONO version of your gear arrangement is basically done. Just usual headache trying to get crown to fit. Used screw for brass idler post with bushing/spacer. T shaped strap is held by same screw, extends toward rear where bushing in strap holds cluster shaft.
Gonna look at the pics more.................. Peter
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Post by SKR on Jan 4, 2014 15:39:22 GMT -7
Peter, glad you could find some ideas from my post. This is a fun creative class. Made 10 passes earlier today. Best run was a .4852 @ 31.86 mph (24.8V). Very consistent .48 car. Good news is that no gears were hurt. When I get it back from this race, I'll drop a hotter armature in it, I think it will have no problem handling it  I'll be running an Hairy Canary Altered body this time out. Still needs some minor touch ups.   |
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Post by SKR on Jan 11, 2014 11:43:50 GMT -7
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Post by Phantom B.S.E. on Jan 11, 2014 12:10:30 GMT -7
Looks great! What size are the bearings you used for the rear?
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Post by SKR on Jan 11, 2014 18:07:30 GMT -7
Tom, I bought these over a year ago. The bag says they are this size 1.5x4x1.2 Ebay: BearingsSam |
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Post by kiwidave on Jan 11, 2014 18:16:41 GMT -7
Just Wow!!!
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Post by SKR on Jan 26, 2014 14:07:27 GMT -7
adjustable timing on a 4G chassis? Been playing around with this. I don't think it would be helpful in FED where the rules allow timed armatures but could be helpful in other builder classes such as Door Slammer where the rules allow you to modify the chassis. I modified a fiberglass com plate from a AW armature. All the electrical will have to be reworked. I was thinking of using brush cups on this one. The chassis has been sanded to help accommodate the timing plate and to allow for better track clearance. The rear axle position might also need to be modified to get more track clearance. Not sure when I'll complete this, just thought I'd share it to hopefully spark some interest for other builders.  |
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Post by dave632 on Jun 30, 2014 12:41:10 GMT -7
Some great ideas there SKR. Inspires the builder in me.
What kind of tool did you use to make the small slots in the fiberglass plate?
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Post by SKR on Jun 30, 2014 18:10:56 GMT -7
glad to hear Dave. I used a small drill bit then started filing away. It did take awhile. I haven't played with this since I posted these pics. Let us know if you start modifying some builds. We'd like to hear about them.
Sam
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Post by dave632 on Jun 30, 2014 19:41:53 GMT -7
I have to look at the rules since I will not be running any dragsters and see where I can modify the chassis. I like the rear assembly with the ball bearings. Anyone try putting ball bearings on the motors?
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Post by pceng on Jun 30, 2014 20:39:27 GMT -7
I have to look at the rules since I will not be running any dragsters and see where I can modify the chassis. I like the rear assembly with the ball bearings. Anyone try putting ball bearings on the motors? Intresting about the bearings for arm shaft.......... if bearing in plate was flush with plate and chassis bearing tilted holes might be straightened ..... or lined up for arm shaft and holes to be true......unlike the way they are to begin with. ................... Peter |
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Post by Deleted on Jul 1, 2014 16:06:29 GMT -7
OK, you guys are over the top.
quantum leap in builds for me.
now I only need a machine shop.
LOL
gonna have to read this again and keep up with new posts.
my programs are way behind these modifications.
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Post by SKR on Sept 20, 2014 9:24:20 GMT -7
a few pics of a new build taking place:   |
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Post by dave632 on Sept 20, 2014 9:37:19 GMT -7
Interesting changes, looks good. Now that some time has passed how well did it perform on the track?
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