If you get to test with a duct then please share data.
I believe Flite is optimised for duct. They are selling the no-duct conversion kit for “experienced riders” they claim. I think I’ve heard 5% increase in top speed.
Personally I left ducts in my prototyping phase as I got +20% energy use all-ready at 25kmh.
This season I’m building smaller E-foil for my son, so I’m rethinking the ducting during his learning phase…
Sure will do. Although my build is more into the none foil e surfboard than with foil, believe the impact of the duct will be about the same. Its kind of irritating the the duct in this size starts to increase drag at very low speeds, still think it would add at lease some safety compared to bare prop.
So it runs about 10% less rpm and about 10% less total efficiency than FR prop… fair enough 
hello i just order one for test with my gear unit syteme without duct🤙 coming later for log
Hi guys. I justed posted a video of my new propeller. Have a look 
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https://www.instagram.com/p/CLrcJe7DyPw/?igshid=12zjbsreeso0y
I accidentally noticed your post and metr.at links that were not displayed correctly. The reason was forum domain changed from efoil.builders to foil.zone and I had to enable a new domain on my end. Now it works 
Happy efoiling! 
Thank! I see that you support the product fantastic big fixing on other forums.
Need to be honest though. I’ve struggeled to get more than 30s vesc logg with my 3 Metr’s during the full season (IOS continue logging, but not the vesc data). Had alot of discussions with Metr and know fellow rider @nice2cu had same issues that we covered in threads here.
Now all of a sudden after new year it has worked flawlessly! Any big update or IOS thing that you know of? I feel abit stupid as I had given up and ordered 2 WavRX CAN instead. Now it seems I do not need to replace after all.
Will celebrate with Metr log of FLite flyer wings setting new efficiency record from today. 100kg rider as always, upstream with 16s 100kv 6"FR. Flite stab set at only 2deg neg angle, target speed 30kmh constant. 68w/km!!
would say 15% lower rpm, comparable to 7" pitch instead of 6". I know the Metr avg is higher for the Flite-prop, but I might have fallen during that run or so. If you look at steady state at same speeds, there is no real efficiency difference that I can tell.
Do you ever ride with a secondary GPS? Something’s wrong in the figures here. Either the speed is incorrect or the erpm is wrong (if this is a 6’ pitch prop) as it’s resulting in a negative prop slip which is impossible.
Hi Jeremy,
Yes I usually ride with Garmin Virb or Gopro also, but I do not hink speed is the issue.
Looking at steady state from the latest graph, I took an example.
59V, 66%DC, 9600erpm, 30,0km/h.
You are right there is like 3% neg slip. The best explaination would be that the FR6" is not 6" exactly, perhaps its 6,3" in reality, then the slip would make sense.
What bothers me is that I only seem to get about 80kv also under medium load from the motor. It is an 100kv 65161 Flipsky and Vesc/Metr is setup for 6 poles.
FR prop have variable pitch , first small prop I measure went from 5,5-9 at the tip
Like most prop ? Very hard to just put one number on it
I didn’t measured the new one yet , but we can use the calculated speed vs erpm like on eSkate ( convert estimated pitch to a wheel diameter) , to match the gps speed
It’s either the vesc or metr that are the issue…
When I ride with the arc200 I get a prop slip of around 7% with my most efficient foil. I’ve seen the same figures on the with a swordfish 300a ESC as the arc.
The FR prop is an accurate 6’ pitch.
I have a vesc and metr here so I’ll see how different things get when I try it when the weather warms up a bit…
Thanks I think we need share more data to conclude.
Regardless as advice to others I can reiterate that I can highly recommend the Flite prop for DYI. It runs like a 7" prop and is close to efficiency of the FR prop.
Regarding the Flite flyer wing, I can also definately recommend it as an efficient high speed wing. It has 740mm span and 800cm2. The stab has 440mm span and is called “290” nowadays in the Flite portfolio. It is very similar to the Axis 440 stab except mounted from bottom.
The combined kit can be purchased for 660€ through flite, now that the new arrivals has come.
Pitch and slip always a super interesting topic! When testing on planning boats, have come to the conclusion that pitch is kind of indicative value, a rough starting point but not much more. Each brand seams to have their own way of calculating the pitch. That makes also slip calculation hard…usually when seeing very low slip, usually suspects higher pitch than informed. Slip is also dynamic, vary pending on speed. Also material counts, on for example Yamaha props, when moving from alu to SS, even if the shape is the same, you might need to go down in pitch because the SS flex nothing, what is a good pitch on alu, usually wont work on SS. It might be that plastic propellers take this in account also, some flex might be calculated into the pitch figures, whom knows?
For sure in this application also wing size/profile will impact on slip, as also what is the optimal pitch.
Your comparison figures are super useful, not that many comparison between the FR prop and others that would work well. Soon some one will do a modd on the Flite propeller or improved version maybe?
I see the prop is no longer available from Deepvee… Any other places have it?
I ordered it from this French shop
Thx man! I’m freezing my balls off trying to get useful data, so your kind word warm up
Any US places have the prop in stock? I did some search before but couldn’t find anything.
edit: I see it here for $250 
Fliteboard True Glide Propellor | USA Orders
edit2: and another one here for $45+$50 shipping… Flite Propeller | Fliteboard™ USA
Is the 250usd price justified with respect to the 25USD of the previous propeller models ?
'Fliteboard prop alternative to FR? - #28 by SoEFoil
What will be the selling price of this prop ?
