|
#61
|
|||
|
|||
It should'nt lean at all when it jumps, the center shafts rotate in opposite directions.
|
#62
|
|||
|
|||
Quote:
|
#63
|
|||
|
|||
both your top yellow arrow, and your left blue arrow need to be flipped around.
|
#64
|
||||
|
||||
Quote:
That drawing is 100% correct, try looking at it again and realise that the top gear is connected to the front centre shaft only, and the bottom gear is connected to the rear centre shaft only. Heres a diagram similar to above but showing where the gaps are and will also show which gears are the driven ones. |
#65
|
|||
|
|||
Quote:
The gear near the spur drives the rear driveshaft, and the gear opposite to the spur side drives the front shaft. And both the "yellow" gears always rotate in the same direction. |
#66
|
||||
|
||||
I wasn't talking about the torque making the buggy lean. I was thinking about the weight of the motor making the left side heavy. But then, I looked again and it's no more unbalanced than a 511X.
__________________
http://www.modrc.com |
#67
|
||||
|
||||
Motor on one side, servo, ESC and receiver on the other. Presuming 50g, 80g and 20g respectively, that's maybe 40-50g heavier on the motor (190-200g) side. A lightweight motor would even it out a bit.
__________________
Photos: Oople Invernational 2010 - Sodden Sunday Muchmore N. Irish GP 2010 (Touring cars) BADMCC 1/8th Nitro buggies Current cars: X6^2 | JC BJ4WE | TM E4 & E4JS | HPI E-Firestorm | Losi Crawler | + many F1s, super crawlers, scalers, drifters in the works... |
#68
|
||||
|
||||
It does look a bit unbalanced on their demo unit, but they were using a club transponder on the motor side. A personal transponder can fit right on top of the servo. The 511 has components in pretty much the same places, so it shouldn't be a worry.
__________________
http://www.modrc.com |
#69
|
||||
|
||||
So if the shafts don't run in opposite directions, what's the use of all the extra gears in the centre? It's not a diff, it's not something magical spell or device from Harry Potter to make things fly very controlled and unrealistic while in mid-air, and so far the only things we do know about it is that it adds weight to the car and it's rotational mass, plus the gears make the drivetrain less efficient. Way to go
|
#70
|
||||
|
||||
Look this picture long enough and you might notice that there is no extra gears. Look where the gaps are.
__________________
Xray XB4 - Serpent S411 - Tamiya F104W - Yokomo BD7 |
#71
|
||||
|
||||
Quote:
It would be more useful carrying around your spares inside the car so you have them with you when needed than using them in the drivetrain and having them wear down while you carry them around in your car |
#72
|
||||
|
||||
We already discussed the reason for not going with the single shaft one page earlier. The four gears do look like a lot of extra friction and complexity but it is really just one extra gear contact point compared to the Awesomatix tourer. It's certainly more maintenance than previous designs, but if it works on the track, it will have a following. I'm not so convinced by the sideways stick pack design though. That does seem a step backwards as competitors are getting slimmer and slimmer with great results.
__________________
http://www.modrc.com |
#73
|
||||
|
||||
I think with 4 gears gears don't wear so quickly. If this gearbox works properly maybe next TRF car has same kind of layout and gearbox with saddelpack lipos.
__________________
Xray XB4 - Serpent S411 - Tamiya F104W - Yokomo BD7 |
#74
|
||||
|
||||
To reduce roll in high grip situations, there's always the option of using a shorty lipo across the back, much as you can in a X6.
__________________
Photos: Oople Invernational 2010 - Sodden Sunday Muchmore N. Irish GP 2010 (Touring cars) BADMCC 1/8th Nitro buggies Current cars: X6^2 | JC BJ4WE | TM E4 & E4JS | HPI E-Firestorm | Losi Crawler | + many F1s, super crawlers, scalers, drifters in the works... |
#75
|
||||
|
||||
Quote:
And perhaps it's also a bit of disappointment that it's not a 'new' and 'innovative' feature Tamiya designed, but just two gears added to the car... |
#76
|
|||
|
|||
To my knowledge, there are not too many 10th scale off road race cars with this layout and shaft drive...
|
#77
|
||||
|
||||
Quote:
This car has less gears than the DF-03 and although there were many complaints about that car, few if any were related to extra friction or gearbox maintenance. It's just that the early pictures on this one got people all excited about counter rotating shafts, centre diffs and flux capacitors, so when it turns out that they were just gears, feelings were hurt and hearts were broken.
__________________
http://www.modrc.com |
#78
|
|||
|
|||
Interesting solution, rather like one of the possible ways of building the Awesomatix touring car, and evocative of the classic Tamiya 4wd chassis. Puts the motor in the ideal orientation for getting the power down, but also hangs it out off the side of the chassis
__________________
Online Business Optimization |
#79
|
|||
|
|||
Quote:
Everybody knows flux capacitors are too big to fit in an R/C car. They havent been able to shrink that technology down to 1/10 size yet. LOL! |
#80
|
||||
|
||||
Quote:
The moment of inertia of the driveshafts is insignificant; they are relatively lightweight; slender; have their acceleration cushioned by a slipper clutch and rotate 4x slower than rotor in the motor. How many times does the DB-02 design need to be explained before people understand why it is the way it is??? |
|
|