2dof Jazzy Mini [noob]

Hello all I have been super into sim racing for a few years now and want to build a 2dof and possibly 3dof in the future. I was gifted an old Jazzy Mini that was my great grandpa's. I have bean reading researching and sourcing parts. I am having difficulties figuring out the power output of these motors one ai says no info another says 1200w, I hope not lol I bought a 1200w psu thinking these were 200w give or take. I am needy for guidance.

Gear boxes look good maybe 40:1 range.

✅ Summary Table
Spec Value / Estimate
Type 24 V Brushed DC w/ gearbox & brake
Max Current ~75 A peak
Nominal Voltage 24 V
Peak Power (motor only) ~1,800 W
Estimated Torque (post-gearbox) ~20–40 Nm
Brake Current ~1–2 A @ 24 V
Weight ~13.5 lb (6.1 kg)
⚡️ TL;DR: Expect ~100–400 W per motor on average, depending on load and motion intensity.
⚡️ TL;DR: Expect ~100–400 W per motor on average, depending on load and motion intensity.
✅ Real-World Motion Sim Wattage Estimates
Usage Type Realistic Draw Per Motor Total Draw (2 motors)
Idle / Static ~5–20 W (holding force only) ~10–40 W
Light Motion (flightsim / casual use) ~50–150 W ~100–300 W
Racing / Moderate G-forces ~100–300 W ~200–600 W
Aggressive / VR or drifting sim ~200–400 W ~400–800 W
Peak / Sudden sharp movement ~600–800 W for a brief spike ~800–1600 W peak for both
am I in good shape?

I also ended up going with 2 sets of 6Ohm 100w resistors to deal with regen.

Wasnt very clear I have 4 6Ohm 100w resistors my plan was all 4 in parallel on the p1 channel of the sabertooth for 400w 1.5Ohm resistor bank and then use P2 to possibly run the brakes or run the brakes directly from PSU for shutdown

I also came up on this driveshaft so 2 choices the overly stiff single or the very smooth but longer double cardan joints

Starting on top frame using 25x25 1.8 box trying to keep it light. Any tips on control arm mounting location? I am likely mounting from the rear shoulders but ascetically prefer front mount.

Okay I built the top frame and got really bummed It weighs 100lbs with wheel pedals etc, is this too excessive ? I hope not... Here are some pics

I just weighed my seat and its 30lbs, interesting.

I was planning for behind the seat just under the shoulder blades the reason for the bar behind. I have 15in 12mm threaded rod with heim joints, so my other reasoning was mounting the motors raised up on the mid frame almost at seat level to get 30ish degrees back and 5ish inward with motors pointing toward the u joint. My other plan is to lower the center of gravity as much as possible by raising the u joint mount to the absolute bottom of the seat

This is what I measured on the rig itself. I bugged Ai some more but I am still skeptical about my weight being a problem. Total weight with me is 300lbs roughly.

Ai says:
The M1PA010356 is a Pride Mobility part number for a Jazzy 610/614 drive motor, typically used in mid-wheel drive power chairs. Based on manufacturer specs and teardown data:

⚙️ M1PA010356 Motor Torque Specs

• Voltage: 24 V DC
• Gear Ratio: ~30:1 planetary gearbox
• Motor Shaft Torque (pre-gearbox): ~2.0–2.5 Nm
• Output Shaft Torque (post-gearbox):
  ≈ 60–75 Nm → ≈ 45–55 ft·lbs

That’s per motor at stall, so your dual setup could deliver 90–110 ft·lbs total — assuming full voltage and no current limiting. Real-world torque will be lower depending on your PWM duty cycle, battery sag, and thermal limits.
Perfect — with a 2-inch torque arm length from pivot to rod mount, we can calculate the linear force your motors exert at that point using this:

Force Calculation from Torque

Formula:
You’re working with **≈ 45–55 ft·lbs per motor**. Converting units:
- **Torque:** 45–55 ft·lbs → **≈ 540–660 in·lbs**
- **Arm Length:** 2 inches
Calculation:
So each motor delivers **~270–330 lbs of linear force** at the actuator end when stalled — and you’ve got two motors, giving you a combined peak force of **~540–660 lbs**.
That’s serious grunt. If you’re hitting full stall torque during motion (rare in practice), this setup could throw a loaded rig around like a go-kart. Want to run load simulations or compare that to your total dynamic mass for motion fidelity?

Definitely would like to do that unfortunately they do not publish their specs anywhere I can find

Very good point, I counted rotations personally and got 30:1 reduction but as far as legit power rating beyond some generalized number has been very frustrating, would you possibly know a good source or similar setup I may research? That is the main reasoning behind my 50amp 24v psu and sabertooth choices. I am a bit in the dark and trying to piece together a full picture from fragments of information. One thing I definitely will do on this build here is try to give a summery of my experience as well as a parts list and some sources that helped me. In my opinion people wont dive in if there is no clear path.