Lighter Props vs. Heavier Props
Added 2017-03-23 03:42:58 +0000 UTCThis video is me trying out KingKong 5x4x3 props on the Coyote. I originally expected that the 2400 kv motors would be best suited to heavier props. I used the Strix Talon 5x4.2x3 (similar to Racekraft 5051 "crane" props). But my meeting with Bulbufet made me reconsider. He flies high-kv motors (2600kv or thereabouts) with two-blade 5045 props. And his copter made the Coyote look like it was standing still in a flat out drag race.
Actually, my freaking QAV-R made the Coyote look like it was standing still, and it's not even built for speed.
I don't claim to have all the answers when it comes to speed, but in this case, it seems clear that the heavier props are loading the motor down to the point where it has less top end. It's always been my impression that light props on high kv motors have a good top speed and weaker acceleration, while heavier props on lower kv motors have less top speed and better acceleration. If that's true, then lighter/higher kv would be preferable for larger courses with longer straights, and heavier/lower kv would be preferable for tighter courses with lots of corners. But I'm kind of questioning everything since Bulbufet has podiums to prove his point, and he flies light/high kv full time.
Anyway, I put the 5x4x3 on the Coyote and damn, it was faster than on the Talons at least on this kind of course. Hope you enjoy.
PS: Don't tell me Betaflight can't have great propwash handling.
Comments
I have some cyclone that I mean to try. I just stuck the KK on there to test the point that lighter props would be faster. I do think the KK are superior to the DYS for what it's worth.
Joshua Bardwell
2017-03-24 03:04:30 +0000 UTCProbably worth noting that that prop design is not very good, especially not for speed. The DYS version I tested were pretty bad. Still, if the motor can't handle the weight of the prop the speed goes away there too as it can't sustain the high RPM. I highly suggest you get some DAL Cyclone V2 (T5046C) and then you won't fly these KK anymore ;)
2017-03-24 01:59:02 +0000 UTCIts hard to get a sense of prop performance for racing when carrying around 70g+ of GoPro. Would love to see DVR instead. Hold on to your hats!
2017-03-23 21:58:42 +0000 UTCYeah, I agree that the type of course really matters when deciding on a power system.
Joshua Bardwell
2017-03-23 15:35:35 +0000 UTCNice!
2017-03-23 11:39:37 +0000 UTCVery nice you were definitely carrying a lot of speed throughout...
2017-03-23 10:22:52 +0000 UTCIm using kingkong triblades 5045 v2 and 5040 nylon over 30 hours and my results not im test in feeling is nylon is better because feels faster , more reactive and i can fly more time. My opinion has been always to be faster in curves. If you are faster getting in and out from curves you can win. Im talking about a normal circuit sharing straighs and curves, on high speeds not, you will just fly more😂😂
2017-03-23 07:51:23 +0000 UTCThere was a time when HQ was absolutely the best tri-blade 5" prop out there. They are still very good because they are stiff and light but they are more chosen by freestyle pilots than racers I think.
Joshua Bardwell
2017-03-23 04:47:25 +0000 UTCWhy hq props are first choice of many pilots out there? So far i didnt try any hq prop just kingkong 5x4x3 :)
2017-03-23 04:35:42 +0000 UTCHoly canoli J, that was fasssst! thanks for sharing your opinions, experiences, and this vid@!
Random FPV
2017-03-23 03:56:19 +0000 UTCMan. That was fast. On my ShenDrones Full Tilt Boogie L im running 2204 Cobras and 5045 HQ bullnose. Those props are very old school and take branches OK unless they get hit hard then they break at the base. I couldn't t say no for this build because the props are 1 dollar a pair on StoneBlur Airlines so I stocked up. Anyway, my point is that at the lowest tilt which is like 35 or so degrees this darn thing flies much like in this video. Really I would need it at 40 plus degrees of tilt to hold a full throttle in a straight for more than a few seconds. The build is so light even with the GoPro4 I had no desire to upgrade the motors. It only draws like 86 amps max. I did cut the bottom of the TPU for the FPV camera to lower it to 25 degrees so I can freestyle in tight quarters with it. It was too fast for me at 35 degrees in a new area with palm trees all over. I just have to use hot glue to hold the FPV camera in place now but at least I'll get more use out the the copter for freestyle.
Carlos Martinez
2017-03-23 03:54:30 +0000 UTC
