The difference between D and Y winds in my opinion, is how much timing each type of wind runs best with. I think D wind motors need 0 degrees, or low timing, and Y wind motors need 5 or 10 degrees, or normal timing in general.. This was told to me by a technician at Castle Creations that makes their motors so I tend to trust this info. I guess you could go up in each case but advancing timing increases heat a lot, so it depends on where you are on the performance vs. longevity scale
I asked the timing question to HH about my rtr Impulse 32. They said all their marine motors are y wind and default to 7 degrees timing. Not sure this matters but just sayin'.
I bought a single drive carbon cheeta last year and it has a leopard 4074 2200kv , I’m not into racing cause there’s no boat scene up here in maine so I just do speed runs. I’m honestly not that knowledgeable when it comes to the electronics but I’ve read on OSE that the 4074 is not a real 6s speed running motor. Maybe for 2 to 3 seconds. Well I have 8s packs so I’m looking to upgrade to something I can run on 8s. Any suggestions? I’m also running the seal ZTW 200 which says it can handle up to 8s.
I bought a single drive carbon cheeta last year and it has a leopard 4074 2200kv , I’m not into racing cause there’s no boat scene up here in maine so I just do speed runs. I’m honestly not that knowledgeable when it comes to the electronics but I’ve read on OSE that the 4074 is not a real 6s speed running motor. Maybe for 2 to 3 seconds. Well I have 8s packs so I’m looking to upgrade to something I can run on 8s. Any suggestions? I’m also running the seal ZTW 200 which says it can handle up to 8s.
you can run 8s on any motor granted it can handle the voltage and load. Usually in the 800-1500kv range. 8s doesnt magically make it faster, either.
I was curious about, which was better the D wind or the Y wind. So I was fortunate to be able to some testing to find out which is better.
For testing I took a leopard 3650 3650kv 2y motor. I ran 4s for the test through an xlx2 esc, I used a x642 for the load. Max amps was 307 amps.
For the other test I had the leopard 3650 4550kv 3d motor. I ran 4s for the test through an xlx2 and used a x642 for the load. The max amps was 313 amps.
So the d with a significantly higher kv pulled slighly more amps than the far lower kv y wind motor.
This is where thing got interesting the d wind can was cooler than the y wind can. And the d wind had way more loaded rpm.
The test revealed that the y wind is far more amp hungry than the d wind and far less efficient than the d wind.
After doing that test I will never buy anything other than d wind.
I found the d wind motor runs cooler at 0 degrees timing.
For testing I took a leopard 3650 3650kv 2y motor. I ran 4s for the test through an xlx2 esc, I used a x642 for the load. Max amps was 307 amps.
For the other test I had the leopard 3650 4550kv 3d motor. I ran 4s for the test through an xlx2 and used a x642 for the load. The max amps was 313 amps.
You're testing method has some potential flaws, or at the very least, is missing important data points and testing conditions. One could argue any data collected from a motor run so far above it's efficiency range, is useless to real world applications. Experimenting is awesome and if you've concluded on your own that D Wind motors are best for your applications, great. But to rule out all Y wind motors based on that one test may be limiting your own potential.
Me, I've never been of the mindset that I've squeezed all the potential out of any boat I've built and setup to ever notice the difference in performance of the specific type of wind in the motors I chose to run. For me, wind type is an artifact that happens to follow the kV and can size I've selected for the hull size and speed goals in mind. It only dictates what timing I set my esc's too.
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