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Roche Rapide P12 Evo 1/12th Competition Kit

01-03-2019, 05:19 PM - Wikipost

R/C Tech ForumsThread Wiki: Roche Rapide P12 Evo 1/12th Competition Kit

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Last edit by: hanulec

Questions/Answers:
Q1. Will the P12 Evo support a traditional style steering servo setup?
A1. Yes. The chassis supports this, but parts are not included.

Q2. Will the P12 Evo support prior Roche P12 front ends featuring a Xenon lower arm?
A2. Yes. Prior front ends will directly bolt on to the new P12 Evo chassis

Q3. What is the maximum size servo width that can be used on the P12 Evo?
A3. Maximum servo width is 33mm

Q4. Which servos fit into the P12 Evo?
A4. (not a complete answer -- working on building up a list)

Sanwa SGR-HR (must cut off the top/bottom additional case pieces)
Sanwa SRG-HS (must cut off the top/bottom additional case pieces)
KO Propo RSx3-12 Digital Mini Servo
Futaba High Voltage BLS671SV S.Bus2 HV SX Mini Servo
Hitec HS-7235MH Hi-Voltage "Hi-Speed" Metal Gear Digital Mini Servo
XPert MI-3301

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11-20-2021, 03:42 AM

#241

gwc

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Quote:

Originally Posted by bentouttashape

Can anyone give me the lowdown on the lightweight axle and hubs: 410042 & 410043? When and why would these be preferred over the standard spool axle? I currently have a diff and am looking to try out a spool. I have the option of purchasing either, standard or lightweight.

Standard solid axle and hub

Less rotating mass.

11-20-2021, 03:22 PM

#242

bentouttashape

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Quote:

Originally Posted by gwc

Less rotating mass.

Then what's the trade off?

11-20-2021, 04:42 PM

#243

gwc

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Quote:

Originally Posted by bentouttashape

Then what's the trade off?

With less rotating mass it will spool up quicker accelerate faster...slightly.

11-21-2021, 05:14 PM

#244

bentouttashape

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Right, that's the advantage. What I am asking is what is the trade-off of the lightweight axle, as in, what is the disadvantage? In other words, why run the standard axle at all?

11-21-2021, 05:21 PM

#245

hanulec

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Quote:

Originally Posted by bentouttashape

Right, that's the advantage. What I am asking is what is the trade-off of the lightweight axle, as in, what is the disadvantage? In other words, why run the standard axle at all?

the lighter weight items just came out later -- as further optimizations.

the 'standard' spool axle is longer and works in F1 / 200mm configurations

11-21-2021, 05:52 PM

#246

gwc

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Quote:

Originally Posted by bentouttashape

Right, that's the advantage. What I am asking is what is the trade-off of the lightweight axle, as in, what is the disadvantage? In other words, why run the standard axle at all?

Sounds like you answered your own question.

11-21-2021, 07:54 PM

#247

bentouttashape

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Quote:

Originally Posted by hanulec

the lighter weight items just came out later -- as further optimizations.

the 'standard' spool axle is longer and works in F1 / 200mm configurations

Ah, gotcha. Wasn't aware of that. Thanks!

Quote:

Originally Posted by gwc

Sounds like you answered your own question.

Not really. You're not always aware of what you don't know. That's why I pitched my question to others, so I'm not overlooking anything. Not being aware of the timeline, as was pointed out in the reply before yours, it appears that there are two simultaneous options, which would suggest pros and cons of each.

12-05-2021, 05:30 PM

#248

biz77

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Anyone know of a US-based retailer that has the Zen Racing servo/shock mount in stock for the EVO1 in stock? Paying $31 in flat rate shipping from Zen direct isn't a palatable option for the few items I need.

12-05-2021, 06:53 PM

#249

hanulec

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Quote:

Originally Posted by biz77

never stocked these -- there wasnt a massive market for it

outside of 17.5 racing we had better luck using the traditional steering setup (non-bell crank)

gwc likes this.

12-06-2021, 09:38 AM

#250

biz77

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Quote:

Originally Posted by hanulec

never stocked these -- there wasnt a massive market for it

outside of 17.5 racing we had better luck using the traditional steering setup (non-bell crank)

We run the Reedy spec 13.5 motors, basically the same power as a ROAR 17.5, on a very small (55x32) and tight gray carpet track. I recently switched from the bell crank to the traditional setup and went slower despite dropping 36 grams from the car - about 16 from the switch to the traditional floating servo mount and 20 grams of ballast I didn't need as I was able to run my huge SMC ESC more towards the center of the chassis. The car also felt easier to drive with the bell crank. Given that info, if you still think the traditional setup is the better route to take, I'm open to suggestions on how to make it better.