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The Castle ESC hasan MSRP of $315 usd, at least from what I can find. LMT doesn't make ESCs - they only make motors. MGM makes their ESCs. You might want to look here...

This is a good resource for more of a deep dive on MOSFET capacitances: https://toshiba.semicon-storage.com/info/application_note_en_20230209_AKX00063.pdf?did=13415

Just wanted to share what I've learned the hard way. Higher motor pole count means higher electrical RPM (i.e. eRPM). Actual rpm is calculated be eRPM divided by the number of pole pairs in a motor. So if you have a 4 pole motor (2 pole pairs) running at 80,000 eRPM, you'd be turning 40,000...

WB - are you coming out of your winter deep freeze? :) I think sensored is preferred - it eliminates a bunch of issues. The LMT motors are great, too - just not easy to get. The biggest issue with the TP motors is that most of them are 6 pole motors (I believe), necessitating a very hgh...

You didn't happen to video any of the process, did you?

Wait - what? Code written by ChatGPT? More information, please - software is my weak spot...

Mine is made from an HDPE cutting board .915" thick.

The problem is without battery current, battery power or duty cycle, you can't calculate actual power input (over any length ot time, anyway) to the compressor. The other thing I've discovered is that a simple hole doesn't do a particularly good job of replicating the dynamics in a running...

cmoalem is right - it's a T5 belt (he's the first one to discover that, iirc). However, I'm really interested in how your setup works out - it might work better than the castle motor. Definitely keep us posted.

I just went and measured my HOLE. (too easy for jokes...) I must have used a boring head because my HOLE is exactly 1.000 inches. Like to the thousandth. So if your HOLE is smaller than my HOLE, that might explain why your current readings are a little lower. What batteries are you using...

And one final thing - running it without the restrictor is much scarier in terms of violence in the immediate vicinity - give it a shot... :)

BTW - if your test engine replicates the 1" restrictor performance, you can "pulley up" and get more impeller rpm until the battery current and the phase currents start to diverge. In other words, there's more on the "electric supercharger table" if the input current and the phase currents stay...

Just went through it all - again, fantastic work. I love the motor mount in particular, and am curious how your Pi controller works out. I do have a couple of questions - what was your voltage on the run in the video (can you post a datalog screenshot - I'd like to see the curve); I'm also not...

Wow. TBH, I've been so swamped with everything else I've not had much time to keep up with the forum. But after quickly flipping through this thread, I have to say I'm hugely impressed. Love how your setup looks. I can't wait to take the time to read through this in detail... fantastic job!

^88 Fiero is correct. They're expensive (and big) though. I'm locating a cheaper/more compact source for extremely high-output LiPo batteries. I'll be load testing one soon. The brand is SMC.

Welcome. Definitely check out the posts here - there's tons of info. Your goals should be pretty easy to achieve.

Definitely let us know how the APD works out. I've been looking at that one as well.

Nick - It'll work, but if I'm following you correctly, you have to make sure that charger doesn't have a common ground - i.e. that it's isolated. I actually bought a bunch of cheap chargers to do a hybrid of what you're suggesting and what 88fiero is suggesting. I ended up going with a boost...

The P2 is indeed a clone of a Vortech Si trim - there was a court case over it. The only differences being the billet back plate (and therefore drive mechanism) and the P2 has metric hardware (Vortech is imperial). This is from a guy who was involved in the suit and wishes to remain anonymous...

A quick note about C ratings. They're basically BS, because there is no standard way of testing for C ratings. I'll likely introduce my own standard soon enough; not out of hubris, but to give C ratings some sort of comparative meaning.