Dangeruss wrote: ↑Sat Dec 09, 2023 4:32 pmDon't know anyone did, was more of an install-at-home thing. Tuning it was nearly as difficult. Something regular slipper clutches had over it, quicker/easier adjustments. Multiple 'Drives with their own weight oil was the wicked setup though. Swap 'em out and go.GreenBar0n wrote: ↑Sat Dec 09, 2023 12:09 am This kit was no joke, not sure how someone could install this between races, it was very involved...
A lot of guys thought it worked like a torque converter, but a torque converter forces fluid through the stator and multiplies fluid pressure like a scroll wheel on a turbocharger. Rather, Hydra-Drives operate like a rotary (Houdaille) shock, using fluid as a dampener instead of friction like a slipper clutch.
Now, had Losi fluted the stator and housing it could have created a torque converter and the "X" lineup would've been like...
In the video from '93, at 7:53, he made it sound like Brian Kinwald changed to the Hydra Drive between qualifying races; perhaps I inferred more than was there.
I haven't run the kit yet, but I was expecting this to be like putting a fly wheel weight on a two-stroke dirt bike, to smooth out the power band overall, instead of off and on. I wouldn't remember how this RC10 originally drove though, it's been so long.
Not sure what weight that silicone Hydra Drive oil is, but far more viscous than 30wt shock oil.
Fried my Airtronics Rx today - no noise, no funny smell - had it all plugged in and working with the steering servo, then cut off that blade on the Rooster J connector and plugged it in, that killed the Rx.
Found a cool blue Airtronics Rx replacement for cheap, in a lot of other old Rx's. I'll make sure the Rooster is converted properly next time. eBay seller pic:
If you need an era correct Rx (early to mid 90's), specifically one seen in the pic above, PM me, I'll test them all.
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