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Post by pceng on Dec 12, 2014 11:46:36 GMT -7
Thanks for posting, Al.
Was wondering if gear size made a difference with same ratios. Thought it might come into play.
Have heard the term "spud" before , but am unsure of its meaning. Does this designate a certin ohm range , or how arm is wound ?
I don't expect the car I put together to come anywhere close to what you have done in the past. Used parts from what was on hand. In truth , I don't know what arms & magnets are or have been used in builds such as you speak of.
........ Peter
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Post by Deleted on Dec 12, 2014 12:40:05 GMT -7
SPUD appears to have been a limited edition drag arm from BSRT many moons ago.
don't recall specs, but needed very strong NEo motor and traction magnets to get the most out of it.
in a canabilised BSRT G-3 stiff chassis.
no pickups shoes, just braid soldered to the top tabs of the shoe hanger and wrapped around the front, impaled on the front pickup posts, and through the slots the shoes pivot off of.
no front wheels, springs under the braid floated the front of the chassis.
custom aero body sort of resembling a salt flats low pro and go.
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Post by pceng on Dec 12, 2014 14:44:10 GMT -7
Thanks for info , Al.
Often thought of direct feed for brushes...... mmmm.
On a lighter note - finished up 2nd N2 chassis....... nyuk - nyuk.
T-jet is functioning again...... reajusted bends in brush contacts. Guess chassis is getting old. Getting close on parts for x-trac.
...... Peter
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Post by dave632 on Dec 12, 2014 16:07:55 GMT -7
Thanks for the info. That time is very impressive even at 28 volts.
I was hoping that keeping the voltage at 20 would slow the cars enough to keep some of the more exotic hard to get parts from being needed. This is a test race and we will see how it goes. With the limited gearing I have tried so far the differences have been slight. At this point I have not looked into what RPMs these cars are running but it has to be incredible to reach the speeds they are going. I knew what RPMs my full size car was running in the traps but not these.
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Post by dave632 on Dec 12, 2014 16:54:44 GMT -7
I tried Neo traction magnets and even the very stiff chassis dragged on the track. I have ordered some bigger tires to see if that gives enough clearance. I have some trouble pulling these Neo cars off the steel at the end of the track, have to pull hard on all four rims at once, but it sure stops em. They just hit the cushioning at the end.
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Post by Deleted on Dec 12, 2014 17:08:24 GMT -7
dave, you have to find very "hard" silifoams in order to keep the traction magnets from "squatting" them out.
and I think the DRHOE guys are using tires in the .460 range give or take.
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Post by dave632 on Dec 12, 2014 18:09:25 GMT -7
Thanks Al,
I ordered some in the .450 .480 and .490 range to see what works best. There was no word on what the hardness was. I thought the super stiff chassis would stop the squat but it seems it did not.
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Post by pceng on Dec 12, 2014 18:31:32 GMT -7
Dave, think "Quicker" makes the hard ones...... LuBob's (where else). Have a pair on axle w/22t crown , but only .44something. From same road car as arm/mags. If you want to try them out let me know. I don't think I'm going to extreme with build. So I'm using same tires and t/mags that came with car....
......... Peter
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Post by dave632 on Dec 12, 2014 18:58:00 GMT -7
I think all the tires on the BSRTs measure .445 and they clear with normal traction mags but not with Neos.
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Post by pceng on Dec 12, 2014 21:08:35 GMT -7
Wow , measured tires...... .462 small ones on other car .444......
Should work with your neo monster (size surprised me). Send me your address......
....... Peter
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Post by pceng on Dec 13, 2014 9:36:48 GMT -7
Body work today........ need to finish up Merc (p/m) and fit to chassis. That will make 6 ready to go.
Think the N2 build could be an intresting class....... three or four chassis come to mind. Hard choice of what to play with......... I'll be sending a Life-like & a Tyco to this race. Soon a 3ohm will go in a Super III or Mega G. Just need to decide which is first. Leaning toward the S 3.
Hope a bunch of different chassis are entered for this........ would be great for comparing one to another.
........ Peter
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Post by dave632 on Dec 13, 2014 12:26:26 GMT -7
Yes it would make it more interesting to see different chassis entered and hopefully I can identify and report the different models.
I will PM you my address.
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Post by nosubfor3 on Dec 13, 2014 14:26:44 GMT -7
Just a little something a veteran race buddy told me about tires.He said the stronger the motor and traction magnets are the harder the tire is needed.Example: I could not get my poly car to be competitive with silicon coated tires. Did not matter what manufacturer. He let me try a pair of hard compound tires and WOW what a difference. He basically said the poly cars glide on the magnets. When you use silly foams the car squats at launch and stays that way when the magnet down force takes control. Then each time you let of the throttle the magnetic force is reduced and the car looses down force causing a possible de-slot in the corners.If I wanted to use silicone foam tires I need to increase tire size at least .20.So if the car is competitive with .436 hard compound tires I need to start with .456 silicone coated tires. My bracket cars are Super III's which have neo traction mags and I have .490 silly foams on them. Even with those size tires the traction magnets still need to be adjusted to reduce the down force.I have said it in another post before that the Supper III is a great base to start from for brackets. |
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Post by dave632 on Dec 14, 2014 9:21:31 GMT -7
I have ordered some .480 and .490 tires so I can experiment with the G3 Neos. I have some Super IIIs and they have good traction magnets but they are no comparison to the Drag Neos that the G3 has. On the steel stop track it is very difficult to get them off the track.
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