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#121
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B-fast : http://www.bfastrc.com/ Ain't got the 22 yet, It's due to be released on March 25th. But I love my CR, and I got it working extremely well, so no stress
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Martin Sørlie, 1985. Spektrum DX4R Pro - TLR 22 2.0 & TLR 22-4 - Absima Team Smallsize |
#122
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Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#123
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We rough them, but we can't tell if they're truly flat.
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Martin Sørlie, 1985. Spektrum DX4R Pro - TLR 22 2.0 & TLR 22-4 - Absima Team Smallsize |
#124
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That is true. B-Fast uses machine tools to resurface the rings to a flatter state before doing the two step hand finishing/flattening steps.
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#125
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I assume this flattening process is done to both sides of the ring, of course?
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Martin Sørlie, 1985. Spektrum DX4R Pro - TLR 22 2.0 & TLR 22-4 - Absima Team Smallsize |
#126
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Agreed, I forgot to type that. I'll give them a try of course!
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Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#127
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Yes, both sides of the diff rings are processed.
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#128
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http://www.fioroni.com/inglese/prodo...ngua=ita&pag=2
Looks like those "tractive" diffs are used front, center and rear for 1:8... Considering how much weight we re-add to our cars with LiPo, fitting diffs like this wouldn't be a problem weight wise at least... Oh! And I remember reading about THE car and some very small diffs... are they std. diffs?
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Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#129
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C'mon Schumacher, Durango, whoever.. make some of these for 10th |
#130
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Going back to the Eaton Truetrac diff...
It's not for us. This is from their instruction manual "Note: TrueTrac differentials require a certain amount of resistance at the ground in order to start the power transfer. A TrueTrac differential may not transfer power if the spinning wheel is off the ground. If spinning occurs, often a light application of the brakes, while carefully applying power, will slow the spinning wheel enough to allow the TrueTrac differential to transfer torque to the other wheel." Although it's open until one wheel spins, if that wheel lifts or spins too much, it goes open again. Torsen diffs are a better option, but the amount of work needed to tune the helical angles of the gears to get the performance we need is probably a cost beyond the reach of most manufacturers. Love it or hate it, a friction or fluid clutch is probably the best-cost option to see if an LSD is a performance enhancer or not compared to the beloved ball diff. |
#131
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...my lazyness + rain races... -I guess one of the advantages of an oil filled gear diff is no rust!
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Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#132
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I dont wheter to laugh at this!!!
I have used ball diffs and geared etc etc. the simple rule is a good quality car should have good diffs. ball or otherwise. You need to know how to first build and run in and maintain. If you ask about benifits of different diff type i think its purely to fit in the car design to get best weight and power transfer. But an oil filled diff will have problems if you get water into the gearbox and bearings just like your picture. BTW I thought Cecil Schu was the first to transfer bevel diff into model cars?? Last edited by Neil Skull; 17-02-2011 at 12:54 PM. Reason: typo |
#133
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The top left Schuey logo depicts the principle of the ball diff I've heard. I hope you understand that the last post was a joke
__________________
Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#134
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Cecil did indeed invent the ball diff, and that was the first product of Schumacher Racing. They were made during the week in the evenings, bagged and shipped off the kitchen table at weekends!
I did an article about Cecil for Model Cars many years ago, and spent a wonderful afternoon at his house hearing about his life and times. He is a remarkable man, and one of the great pioneers of RC. If we ever got to have an RC Hall of Fame, he would be in my top three nominations as an inaugural member. Maybe if Cecil could be persuaded out of retirement, this problem would get solved a bit quicker! |
#135
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Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#136
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Fioroni made a 1/8 buggy version of the quaife ATB diff called the Storm traction diff. A series of worm gears that mounted together inline with the drive/outputs Before the Storm traction fioroni had the Hyper traction torsen style diff and the original (older) Japan traction torsen diff main difference between Hyper and Japan was the Hyper had 3 pairs of worm gears perpendicular to the inner gears and the Japan had only 2 pairs. The Storm diff was available with different worm gear sets which had more or less angle on them to change the aggressiveness of the action. |
#137
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Shy, sorry but I don't have anything to scan with, and I don't hold the copyright. I suggest that you write to Alan Harman at RC Car Racer magazine and see if he knows who holds the copyright. HTH
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#138
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i think we get most of the diffs mentioned here for our 1/5th scale cars, from self locking to manual blocking using plates etc
we also get this: http://www.rctek.com/phpBB/viewtopic.php?t=5614 http://www.rctek.com/technical/oddie...ferential.html magnetic diff thats self ajusting to always give the best drive and traction in any condition, from people that have them they say its a huge improvment over the stock alloy gear diffs
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1/5th Hormann HT2 teamkit 08/09. Petrol is the future! PM for info on our new track near ruskington, lincs (every sunday offroad all scales and classes!) |
#139
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Magnetic!!! Funky shit!!! And it works?!!! How cool is that! Looks hardcore Mad Scientist!!!
__________________
Life's too short to go slow! www.ymr.no Tech Tips, HopUps & Bling Xray 2014 XB4 4WD & 2WD | B4 FTW Night Fox XL | Mugen MRX-5 | RB | Futaba 3VCS FASST | Faskolor Visit my showroom |
#140
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Now this is interesting
__________________
Martin Sørlie, 1985. Spektrum DX4R Pro - TLR 22 2.0 & TLR 22-4 - Absima Team Smallsize |
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