rhodenga500 Show full post »
rhodenga500
Update:
Tested all homemade EDF fans (8, 10 and 12 blades) and recorded results.
Used NTM 2700 brushless motor, 4S 1800mah and 3S 2600mah batteries.
Steal tweaking my EDF design and updating documentation and drawings.
Please be patient, pictures of EDF and test stand tomorrow.
This is not a hit and run project. I want to ensure performance and install this type EDF in a parkjet.
I am trying (doing all I can) to get it right.
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Argonath
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very cool..keep us updated! test and fail! soon it will be test and success!


More is learned from failure than is ever learned from success. This is why RCP has been so successful in creating the products it has. It's the failures and input from the failures of people on this forum has made the RCP products what they are and helped so many people to achieve what they have from the information here.
D.I.L.L.I.G.A.F.
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rhodenga500
Thanks Argonath,

My Last Update,
This was done in five days.
I hope I did not disappoint you,
Pictures Attached,,
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rhodenga500
Sorry, forgot The Test Data Sheet see pics.
I conservatively guess the thrust by feel, sliding and movement of the test stand by the EDF. The 12 blade will make it leave the table fast.

Also, fooling around last night with an F-16, 28" WS (an easy build I downloaded from RC groups), I was experimenting with and decided to assemble and install my homemade EDF in it. This gave me an idea of one way to install it.

I am just scratching the surface with these EDF's. Later this year I might revisit it again.
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rhodenga500
I have a short performance test video and I have put it on youtube.

How do I upload the video to this thread?
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Grantman
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I have a short performance test video and I have put it on youtube.

How do I upload the video to this thread?

Copy/paste a link from the youtube page into one of your posts.
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rhodenga500
Video of Performance Test of Homemade EDF. During testing their were no noticeable vibrations from the fan and motor.

Can anyone give me an estimate of thrust from this video?

I estimated 40 ounces of thrust with the 1800 4S Battery.



Thanks.
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quorneng
rhodenga
All you have to do is to click on this 'Media' icon (two little squares). This open a dialogue box and you simply paste in the complete URL of your YouTube video and click 'embed'.
The video will then appear automatically once you submit your post.
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quorneng
Others beat me to it!
Interesting video.
You say your test stand weighs 30 oz. Wood on wood has a coefficient of friction of say 0.5 (could be a bit less with the vibration) so the thrust would be 15 oz.
If you could mount your test stand vertically on a set of kitchen scales it would give you a direct thrust reading.
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rhodenga500
Start thinking of my homemade EDF again. Worked on it a little bit. Tried using thin plywood and purchased an EDF motor. I used a recycled oil filter for the EDF housing and made a motor mount. The space is not close enough between the EDF housing and fan blades.

However, thrust have increased, but still not truly successful. Remember, this is a hobby and sometimes things do not work, so you try again.
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