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-   -   New B-MAX 4 III (http://www.oople.com/forums/showthread.php?t=135306)

jhammond 02-09-2013 09:52 PM

Have to say this looks very well put together.

mes 03-09-2013 06:19 AM

Quote:

Originally Posted by badger5 (Post 800306)
... I wonder how it will do with no top deck, chassis must be over 2mm? ...

I bet the screws along the centreline attach to a longitudinal chassis stiffener. By removing screws, you should be able to increase flex for slippery tracks.

feniks 03-09-2013 04:38 PM

car looks verry fine indeed . aldo I do miss a balldiff in there as that is what I did not like on the XB4 and there fore prefer still my old Bmax

blue_pinky 04-09-2013 09:46 AM

I agree...really hope there is a ball diff option...or the old/previous ball diffs still fit!

Be interested to see how it deals with bending/twisting down the length of the car without a top deck...it must keep the transmission in line somehow!

Does look nice to me though...I want!!! :thumbsup:

JohnM 06-09-2013 01:29 PM

Quote:

Originally Posted by Bastos (Post 799957)

If only those gears would fit in a XB4:wub

discothesnake 06-09-2013 02:24 PM

Quote:

Originally Posted by JohnM (Post 801119)
If only those gears would fit in a XB4:wub

Must admit, quality looks top notch.

dpackster1980 06-09-2013 08:59 PM

Put my deposit down. It looks really good and better equipped than I thought. :wub

I hope it's not delayed otherwise I'll have no 4wd for the 2nd round of Worksop.

Leedsey 16-09-2013 04:48 PM

B max 4iii flex control method?
 
What's others take on this -

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?)
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.
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:

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:

discothesnake 16-09-2013 06:02 PM

The only spring I see is for the slipper adjustment.

The car will be spot in. Yokomo don't build a bad car.

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?)

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.

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:

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:

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.

Leedsey 17-09-2013 08:09 AM

B max 4 no top plate
 
Thanks Neil, understood now.
(thought the back bulk head braces were for lipo retention as deck is sloping in-wards, didn't know like this in 1:8)

The detailing and build looks very nice indeed, see why you like it.
I would be very interested in your opinion once its out and been driven

smokes 17-09-2013 11:06 PM

look like the are creating an I beam in the spine which much stiffer and stronger shape than a flat top deck

OneKiwi 18-09-2013 05:55 AM

Looks like it could be together with the braces.

t8rtot 18-09-2013 01:15 PM

To me, it looks just like an 1/8 buggy setup. Genius!

dpackster1980 21-09-2013 03:48 PM

Don't know how it goes, never seen one in the flesh and I don't care. Looks like they've put a lot of thought into the design.

I've put my pre order in.

AfroP 27-09-2013 09:58 PM

http://www.neobuggy.net/2013/09/27/u...d-b-max-4-iii/

neallewis 28-09-2013 12:26 AM

Looks ace that. Pre-ordered.

TripleX 28-09-2013 03:20 PM

http://petitrc.smugmug.com/Hobbies/2...9794&k=GTNHRcg

dpackster1980 27-10-2013 01:47 PM

Not impressed Yokomo have changed the delivery date on the week it's due. Surely Yokomo Europe knew of the delay beforehand. Gutted it looks like I'm racing a borrowed car for the 2nd round of Worksop because I've just sold my 410 based on the original delivery date. Tut tut :thumbdown:

mikeyscott 27-10-2013 03:40 PM

Quote:

Originally Posted by dpackster1980 (Post 812328)
Not impressed Yokomo have changed the delivery date on the week it's due. Surely Yokomo Europe knew of the delay beforehand. Gutted it looks like I'm racing a borrowed car for the 2nd round of Worksop because I've just sold my 410 based on the original delivery date. Tut tut :thumbdown:

I always heard November, which it's not yet.


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