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Post by 1st1down on Dec 9, 2007 16:06:20 GMT -6
Hi..I am new here And I am buiding a car my daughter who will race in the Awans race and what i would like to know from you "Pinecar wizards"..is I am entering the opendivision and on the axles I have heard that the boy scout axles are smaller in diameter so it would be better to race with them, than the awanas axles, now is there any truth to this? or not..thanx guys
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Post by woodenshoe1 on Dec 9, 2007 18:13:22 GMT -6
1st,
In my opinion, Awana axles are better to use and easier to polish. Axle diameter should be matched to the wheel bore. Very little tolerance or space is best. Needle axles are used by many top builders but they also use wheels with bores that are much smaller. Do a search on this topic on the diferrent sites(Derby Talk, PDDR, PWDRacing, etc.)I think you'll find some great info.
Wooden Shoe
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Post by Lucky 13 on Dec 13, 2007 7:42:53 GMT -6
If the rules allow it the DerbyWorx axles are an excellent after market axle and require little, if any, prep work to use. I agree with Woodenshoe also, if you are allowed to go with needle axles, go for it !!
Lucky 13
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Post by RacerX on Dec 13, 2007 9:30:55 GMT -6
Welcome to the board 1st1down,
This is an interesting question and one that I believe is a bit mis-understood.
The smaller axle by some is believed to have a smaller contact patch with the hub which is believed to create less friction or starting drag. Physics tells that "PRESSURE X AREA = FORCE" and since our axle pressure is constant @ 1.5oz. to 2.0oz. per rear axle and we are reducing the contact AREA that the FORCE downward per sq. thousandths of an inch is increased so is isn't really a gain in theory. In reality it is a recipe for a shakey car due to the increased hub bore spacing. Personally I like the fit of the Awana axle or the Derby Worx axle to the Awana wheel.
Now sometimes this theory also seems to be mistaken for the benefits of REDUCING the hub bore size. By reducing the bore we can take benefit of the smaller axle by reduct the amount of surface area that passes the contact patch significantly per revolution. This is truly a reduction friction, increasing speed and still maintaining stability by keeping the overall axle to hub fit closer together. This is why the league racing separates the std. axle cars from needle axle cars.
Overall, if you are not or can't reduce the hub bore, the std. Awana axle fits the wheel fairly nice.
I hope this helps.
Racer X
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Post by Parrot Racing on Dec 13, 2007 16:07:13 GMT -6
Hey Bill, any way to ream out a bsa bore without totally ruining it?
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Post by derbyace on Dec 13, 2007 20:48:53 GMT -6
You can NOT use a wheel other than an AWANA wheel. Stick with a polished AWANA axle. THese axles are straight and consistent in production. Send me a PM if you want, and I can get you directed/guided on polishing these.
Good Luck!
D.A
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Post by DerbyDoc.com on Dec 13, 2007 21:13:12 GMT -6
Welcome to the board 1st1down, This is an interesting question and one that I believe is a bit mis-understood. The smaller axle by some is believed to have a smaller contact patch with the hub which is believed to create less friction or starting drag. Physics tells that "PRESSURE X AREA = FORCE" and since our axle pressure is constant @ 1.5oz. to 2.0oz. per rear axle and we are reducing the contact AREA that the FORCE downward per sq. thousandths of an inch is increased so is isn't really a gain in theory. In reality it is a recipe for a shakey car due to the increased hub bore spacing. Personally I like the fit of the Awana axle or the Derby Worx axle to the Awana wheel. WOW !!! Im from south carolina and thats big talk for us....let me break it down also. Needle axles with needle sized wheels bust regular axles with regular sized wheels every time. Sweet !!!!! |
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