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Jul 11, 2015, 11:20 AM
Power of motion
Thread OP
Build Log

5045BN test data


Analyze on account of this group of data, you can see that the extreme thrust of old style 5045 propeller is 447g within the accelerator range from 0-90%. Our new style 5045BN propeller can reach extreme thrust of 528g within the same accelerator range. This is an obvious change. Within the range of 0-50% accelerator range, the efficiency and thrust is higher than that of 5045, which sufficiently proves the high efficiency of low speed. Within the 60-90% accelerator range, the efficiency is higher than 5045 propeller with the same thrust. Therefore, we can analyze the differences between new style 5045 NB and old style 5045 under the same thrust.
The most prominent character of new style 5045NB is the thrust which is 18% than that of old style 5045. Furthermore, with the same thrust, analysis result has proved that its efficiency is always higher than that of old style 5045 propeller. Please ask if you have any query, I will be patient to answer your questions.

Test motor and ESC
motor:Cobra2206-21
ESC: 20A

Oh sorry we tested the instrument displays the test data is in Chinese. in the edit data into English, the program is wrong. Tomorrow there will be a new set of data to update.

Red Data with Triangles = GF5045
Blue Data with Circles = GF5045BN
Last edited by GEMFAN ts; Jul 11, 2015 at 12:56 PM.
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Sep 20, 2015, 06:02 PM
☢ Self-Proclaimed n00b FPVer ☢
EngineerX's Avatar
How about making some very efficient 4045BN propellers for the 180mm quads. There's many 180mm minquads now!!
Also... can you revise the 5030x3 propeller. Material is too flimsy so it's not good on 4S 2300kv motors. They flex too much!
Maybe improve to new version 5040x3 or 5045x3 good for 2300kv motors on 4S.

Make sure to use same design as this 5045BN with the fillet at the hub-blade joint. That makes these propellers very strong. I like that!
Sep 20, 2015, 09:09 PM
Power of motion
Thread OP
Quote:
Originally Posted by EngineerX View Post
How about making some very efficient 4045BN propellers for the 180mm quads. There's many 180mm minquads now!!
Also... can you revise the 5030x3 propeller. Material is too flimsy so it's not good on 4S 2300kv motors. They flex too much!
Maybe improve to new version 5040x3 or 5045x3 good for 2300kv motors on 4S.

Make sure to use same design as this 5045BN with the fillet at the hub-blade joint. That makes these propellers very strong. I like that!
Thank you for your suggestion. We have taken action.
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Sep 21, 2015, 02:54 PM
muinomdnwaP
Pawndmonium's Avatar
Not sure what other companies use the term "Bull Nose"besides HQ, but I would like to see GEMFAN differentiate their product with a unique term. The group I fly with has used the term "Blunts" to refer to cut down props. Also "Blunt Nose" works and can be referred to as "BN" (ie. 5045BN)
Nov 22, 2015, 11:25 PM
☢ Self-Proclaimed n00b FPVer ☢
EngineerX's Avatar
We need GemFan 5040 triple blade. Good and strong for 4S LiPo with 2204-2300kv motors!


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