neallewis |
16-09-2013 11:29 PM |
Quote:
Originally Posted by Leedsey
(Post 803338)
Central shaft seems to have a spring in the extra piece near the spur gear Which is presumably allowing for flex during landings, to keep drivetrain together (not dual motor placement?)
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Do you mean the slipper spring underneath the -ve battery lead in this?
http://imageshack.us/a/img542/7395/zx6v.jpg
Quote:
Originally Posted by Leedsey
(Post 803338)
Front top brace over steering housing at the front of the chassis seems wide and made out of alloy/metal- presumable to control sideway flex.
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XB4 brace between posts is made of carbon, and is narrower here. I'd have thought the width would be to do with the Ackerman geometry setup of the steering cranks, giving enough clearance of the front gearbox/diff housing in between, rather than to directly control stiffness/flex at this point of the chassis.
Quote:
Originally Posted by Leedsey
(Post 803338)
Lower center of gravity as Main metal chassis has side plastic add on, rather than over the top like a xb4 and this metal is 'short' to allow the diff housing to be lower at each end:thumbsup:
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Yes lower diffs will help lower overall CoG. The XB4 used the overlayer of plastic tub to control the flex of the chassis. Here the Yok seems to not use the plastic tub to influence flex or stiffness, but the diagonal braces from gear casing down to central spine along the centreline of the alloy chassis. I guess like 1/8th scale.
Quote:
Originally Posted by Leedsey
(Post 803338)
Considering the above, if I've assumed correctly (and the fact most xb4 have benefited from the full length top plate retro added) do you think the diffs fixed to the metal chassis on just one side combined with no top plate is likely to be problematic?:confused:
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The inner camber link mounts are metal and will hold or brace the diff casings. If this is a weak-point, we've yet to see?
I had the XB4 full top deck, but snapped it in between the motor mount and rear slipper bearing mount. I guess the chassis flexed a bit too much on an impact at the oople race last month. A bit of dremmel work allowed me to use the rear brace piece along with the original kit top brace.
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