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truespace

Hi guys,

first of all, i appologise that my frenchy bad english sucks so please be kind

Here is a new project born in my head few months ago
Obectives:
- use commercial parts
- low cost of build (as possible)
- OD/UD
- Wrcca rules ready



Difficulties:
- chassis must accpet a gearbox made with standards parts and ratio closed to the original losi mrc)
- axles with standards parts to accepts actual lockout and popular steering setup
- front axle with 1 low profil servo, esc, rx, lipo 2s 130mah
- find enought space
components choice:
- bevel gears from ar44 (30/8 on rear and 27/8 on front)
- standard size 380 brushed motor
- chassis / skid / plates : 3mm lasercut delrin
- gearbox with mod 0.5 and main gear from sakura 1/10 like
- Axles will be 3d printed PA / SLS (sculpteo)


----------------------
few months ago, i started with that first design, inspired by Ventru shafty from my friend Pat from PsychoPat' Crawler Parts.

cad project:


few days later...



and the gearbox


the gearbox was ok but axles for smal gears was to thin (2.5mm diam) and the ratio was wrong because of a stupid error of mathematics (shame on me)

Axle mod consist to cut tubes, make upper link riser system for rear, and a servo plate for front.
For both axles, need to built a 3d printed part to fit on c-hub (from ar44 or AR60)





first try, first mistakes

after making that shot i realised that chassis design wasn t good because of some parts can t be resized from 1/10 to 1/18


end of the first release


-------------------
2nd release was like a reboot...

the small 3d part for axles was too thin so i tryed with full printed tubes





nice but...

but the screwed part of tubes were not enought strong... then, lets try to print full axles, more strong

Chassis and gearbox : fully re-draw to :
- accept bigger gears and shafts (5mm) from standards parts from industry or rc parts
- accept 2 type of shocks mounting screws (M3 or M2.5 for many chineese lowcost shocks)
- use standards bearings
- place motor inside gearbox
- enable to flip motor front to rear in gearbox and left to right side
- optional : if it fit, od/ud built-in gearbox



Axles are designed, front will be for ar60 c-hub and rear with home made lockers






Here we are !
i m waiting postman
some news as soon as possible