Thank you for the feedback! They should be also less likely to get stuck on branches and safer for turtle mode in tall vegetation. I need to spend more time flying both and see.
Sorry if this seems like a dumb question to you but how did the Gemfans generate more thrust with lower pitch and being heavier than the DALprops while on the same kv motor and at the same voltage? Sorry if this seems obvious to you i'm new to FPV.
I was not expecting this either but numbers never lie. It looks like the smaller blade surface area of the DALprops makes a lot of difference. What you see in the video is just a fragment of several tests, I always confirm the results before publishing anything.
I noticed this myself the other day as well when switching back and forth between these two props on my Nazgul5. I could immediately feel the increased thrust of the Gemfans, especially when doing a full throttle ounchout but also just troughout the throttle range. I had to look up this video and check that I was not imagining things since one would assume that the the lower pitch props have less thrust, not more!. thatks for these excellent tests!
@@muteFPV enjoy your vacation. I just bought some Dal folding 6" props but we just started 6 weeks lock down so it will be a while before I get to try it. Keep up the good work.
hey!, nice comparison, what about vibration? I have the DAL 7 inch and I can clearly see they make my floss vibrate (I see the xfire pro antena vibrate) while a standard non folding prop does not. can you do some sort of vibration test for both?
RCbenchmark has supported my test series with a new test rig that also measures vibrations and torque. I am not ready yet to release any results, my schedule has been all over the place due to COVID and I am still fine tuning everything. Specifically for vibration tests I am considering running multiple tests on multiple props (of the same type) and average the results. I have also noticed that the blades are looser on the shaft of the DALprops and tighter on the shaft of the Gemfans, I don't know yet if and which is better and how this affects their characteristics.
@@muteFPV for the props on the motors you need to turn the propeller 90 degrees to the bell and see if there is more or less vibration. Nowadays all props can be made to run perfectly smooth this way.
@@muteFPV Not every motor bell is centered perfectly. You cannot just put on the prop and expect it spin perfectly smoothly. Tiny balance imperfections can be ironed out with trying the prop in different positions on the bell. Once you will have the new rig you can test this out pretty easily. Good friend of mine was always checking each prop in the BF motor tab and feeling the vibrations holding the quads arm. Yes, the prop change took 5 minutes, but he was flying smooth till first hit, LOL :-) But 2 blade 65mm push on props like on Diatone GTB229 can be evenly just "blindly" rotated and within a minute there are literally no vibrations at all :-)
Not sure if it is worth it, as you said it will only last until first crash :D :D :D I was curious about the 90 degrees you mentioned and thought there was something I missed. Props aren't perfectly balanced either so if you would be getting into this whole process, maybe balancing props and bells and the bench is more time efficient than doing that on every prop change with trial and error.
Bought some of the dal ones, most of them are already shredded because the plastic of the blades is so thin, would not recommend. Also they suck at turtle mode by flipping the quad 360° instead of 180°.
Best fpv channel on UA-cam!
Thank you very much!
Not if you're blind...
@@stevenkelby2169 Not sure you can fly quads by braille? Probably not his target audience.
@BrandonRC thank you for the good laugh :D
@@bassohollic 😂
thanks for putting in the work and sharing this!
Thanks for appreciating it :)
Clear, concise and oh so nice 😎👌
Thank you!
I have tried and like both, in 5" and 7". No data but I'm happy with both, especially for the ease of transport!
Thank you for the feedback! They should be also less likely to get stuck on branches and safer for turtle mode in tall vegetation. I need to spend more time flying both and see.
@@muteFPV Yeah I'm far from a pro pilot, but have no complaints with either brand, compared to fixed props!
Fantastic testing and comparison, mate! 😃
I need to try them both! 😂
Stay safe there with your family! 🖖😊
Thanks, you too mate!
Could you compare both of these folding props to a non-folding one like say the Gemfan 51466? So we can see what difference there is.
Yep, I will. Not soon though, currently on vacation and then I will be upgrading the test rig :)
Complete job brother🤓👍, big like amigo
Thanks mate!
Sorry if this seems like a dumb question to you but how did the Gemfans generate more thrust with lower pitch and being heavier than the DALprops while on the same kv motor and at the same voltage? Sorry if this seems obvious to you i'm new to FPV.
I was not expecting this either but numbers never lie. It looks like the smaller blade surface area of the DALprops makes a lot of difference. What you see in the video is just a fragment of several tests, I always confirm the results before publishing anything.
Lower pitch means that the motor has an easier time, so they can spin faster and produce more thrust.
Maybe idk lol.
I noticed this myself the other day as well when switching back and forth between these two props on my Nazgul5. I could immediately feel the increased thrust of the Gemfans, especially when doing a full throttle ounchout but also just troughout the throttle range. I had to look up this video and check that I was not imagining things since one would assume that the the lower pitch props have less thrust, not more!.
thatks for these excellent tests!
You're welcome Andreas, thanks for the feedback!
nice review
Thank you!
Excellent work and very informative. Do you feel any performance difference on the quad ? Thank you.
Thank you! I don't know yet, I need more time with both. I only flew the Gemfans very briefly and am now on vacation :)
@@muteFPV enjoy your vacation. I just bought some Dal folding 6" props but we just started 6 weeks lock down so it will be a while before I get to try it. Keep up the good work.
Damn :( Where are you from?
@@muteFPV Australia.
Stay safe mate, time to finish repairs and projects that have been collecting dust ;)
Can the blades be replace individually?
They can, yes. The Gemfans will probably be easier to disassemble.
hey!, nice comparison, what about vibration? I have the DAL 7 inch and I can clearly see they make my floss vibrate (I see the xfire pro antena vibrate) while a standard non folding prop does not. can you do some sort of vibration test for both?
RCbenchmark has supported my test series with a new test rig that also measures vibrations and torque. I am not ready yet to release any results, my schedule has been all over the place due to COVID and I am still fine tuning everything. Specifically for vibration tests I am considering running multiple tests on multiple props (of the same type) and average the results. I have also noticed that the blades are looser on the shaft of the DALprops and tighter on the shaft of the Gemfans, I don't know yet if and which is better and how this affects their characteristics.
@@muteFPV for the props on the motors you need to turn the propeller 90 degrees to the bell and see if there is more or less vibration. Nowadays all props can be made to run perfectly smooth this way.
@Miha Oh I didn't know that. What is the reasoning behind this?
@@muteFPV Not every motor bell is centered perfectly. You cannot just put on the prop and expect it spin perfectly smoothly. Tiny balance imperfections can be ironed out with trying the prop in different positions on the bell. Once you will have the new rig you can test this out pretty easily. Good friend of mine was always checking each prop in the BF motor tab and feeling the vibrations holding the quads arm. Yes, the prop change took 5 minutes, but he was flying smooth till first hit, LOL :-) But 2 blade 65mm push on props like on Diatone GTB229 can be evenly just "blindly" rotated and within a minute there are literally no vibrations at all :-)
Not sure if it is worth it, as you said it will only last until first crash :D :D :D I was curious about the 90 degrees you mentioned and thought there was something I missed. Props aren't perfectly balanced either so if you would be getting into this whole process, maybe balancing props and bells and the bench is more time efficient than doing that on every prop change with trial and error.
Bought some of the dal ones, most of them are already shredded because the plastic of the blades is so thin, would not recommend. Also they suck at turtle mode by flipping the quad 360° instead of 180°.
Thank you for the feedback, noted. I have barely spent any time with either, but I will.
Just the name name of the gemfan ones make me wanna buy them 😂
hehehehe 😂
👍👍
:D
@@muteFPV I'm really digging your style..... much much better than JB. Respect!
Thank you very much