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Good luck Ben !
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Today I achieved prop making zen - I made a prop and was completely relaxed and thoroughly enjoyed it. Must be getting used to it eh?
Also here is a 6.25x11 made with 150g carbon. I thought it would be too thick but it worked very well indeed. I got it from a very high profile sailboat mast maker via QDR (think Americas Cup boats) and have a suspicion it may even be high modulus. I don't think you'd break this prop! |
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Last edited by DownUnderPilot; Apr 13, 2013 at 03:28 PM.
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Very very nice!
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Static test DUP folding prop 6x10
Static test @ 950m ASL:
- Neu motor 1115 2Y (1400kv) - CC ICE ESC 100 - Folding prop DUP 6x10 = 5.8" diam. w/BB Aluminum Turbo Spinner 30mm - Lipo: 5S TP1800mah (3S+2S) - Power peak: 1137W - Current peak: 62.6amp - rpm peak: 23044rpm |
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miche , thanks, I wunder how much amps will be on same type/size motor only 1900kv...
Could it be ICE 100 shows a little to high amps ? My calculations says 120-130 amps, 29000rpm with 5s and 1900kv motor.. now what was the rpm tested with these 6x10, hmmm ?? what is mopar who did test ? |
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Last edited by sebbe; Apr 15, 2013 at 08:17 AM.
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,, my bad english, I meant: was it mopar(you) who did the test with the 6x10... |
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It was DUP's 4.7 x 6.1 (6.2?) that Mopar did a vid with, you can find it on the 'Build your own folders' thread, middle of this page https://www.rcgroups.com/forums/show...660562&page=50
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How do you mean Sebbe?
Also, a small correction, Miche has the 6.25x11, his is a special size of 6.1x11. Also note with a smaller hub, we reduce the pitch so he's got a 5.7 or 5.8 x ??? |
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Mty (Tamas) has calculated the following for the 4.7*6.1 folder:
From moparmyway's and feefo's data we can use two data points for the 4.7 prop: 46613 RPM, 2621 W 25479 RPM, 425 W RPM ^ 3 / Pinput = const 46613 ^ 3 / 2621 = 3.864e+10 25479 ^ 3 / 425 = 3.892e+10 The two constants are within 1% from each other, so the data are pretty consistent and the below equation can be used to estimate the required power input (with a MEGA motor) for any RPM (subsonic). Pin = RPM ^ 3 / 3.864e+10 |
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Oh, for sure, I built the 7x10, 6.25x11 and 6x10 for myself really, no issue with them running at 30K.
I think Arctic flyer ran the 7x10's to 5.5KW, not sure of the RPM though: https://www.rcgroups.com/forums/show...&postcount=464 |
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