any updates on this sweet ride!
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.NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s
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Some video from last fall. Since I have upgraded the transmission with teflon and an oil tank.
the fall run
The oil circuit in duty (see the bubbles). An oil pickup in the strut and the oil goes back to the front of the teflon tube
Last edited by pda75; 05-03-2011, 06:57 AM.Comment
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I think the prop is running a bit low, try raising it a little bit (remember, as little as possible, don't want to break a prop or over-rpm anything) that thing is sexy thoughComment
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You' re right. That's the next step.
PierreComment
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I have create an oil tanker : there is an oil pick up in the strut. The oil goes back to the front of the tube, just with the pressure.
I have made some oil pressure measurement,by measuring how high the oil goes in a pipe when getting out of the strut : At 30 000 rpm, 1,4 meter, eg a pressure of 0,13 bars, e.g. 15 PSI
Regards
PierreLast edited by pda75; 05-07-2011, 12:01 PM.Comment
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DSC_5062.jpg
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DSC_5251.jpg
DSC_5108.jpg
Some more pictures running on water in my gallery
http://forums.offshoreelectrics.com/...hp?albumid=344Last edited by pda75; 09-21-2011, 05:11 AM.Comment
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I am wondering what prop should be the next one.
The set up is 10S2P lipo
motor : Lehner 3040/12 (Kv = 875)
Esc: YGE 200 Navy
With an octura Y557, it runs at 130 km/h (81 mph)
With a propshop 6017/2, it runs at 133 kmh (83 mph)
With an octura X460, it runs at 124 km/h (77 mph)
According to the e-logger from eagle tree, the rotation speed is about 30 000 rpm at full speed.
Which prop would you suggest ?
Regards
PierreComment
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depending on temps maybe trying an octura 655 or 657, never run the setup so I can only guess.
What are your temps like?Comment
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I have tried many prop. Here is a table with most of the results.
Image1.jpg
When it states bumping, I mean that I have tried several angles for the strut and try to move the battery back and forward and did not get any way to avoid the bumping of the back of the rigger (I hope "bumping" is the right translation - it shows that the prop has too much lift).
Regards
PierreLast edited by pda75; 09-21-2011, 10:30 AM.Comment
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Any idea regarding the best prop ?
PierreComment
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Pierre,
You might try some of the ABC props with a 20Deg rake. These tend to have low lift. Or for the tail hopping props try adding some cup to the tips. This will helo reduce the lift.
TylerTyler Garrard
NAMBA 639/IMPBA 20525
T-Hydro @ 142.94mph former WRComment
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thanks.
Have you tried propshop large pitch propellers like 5022, 5521, 6019 prop ?Comment
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Pierre,
Just curious, how are you measuring your speed?
MarkAvatar is the dangerous end of a Gatling Gun!Comment
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Pierre,
I have tried the 19 series, but none of the 21 or 22 series props from the Propshop. The 19 series was OK, but I found better performance from modified Octura and ABC props.
TylerTyler Garrard
NAMBA 639/IMPBA 20525
T-Hydro @ 142.94mph former WRComment
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Mark
I measure the speed with two GPS. one on the top of the hull (in the back) and the other one is from eagle tree also on the top of the hull (in the front). Why two ? I have seen from very strange data with GPS (few years ago, I was measuring my own speed while skiing in the moutain. The GPS was on my arm. Once I stopped to have coffee. The max GPS speed of my arm while drinking was 622 km/h (eg 450 mph). I am not a heavy drunker ... but the story became famous !
Therefore, if the two GPS speed are very different I make a new run. With the eagle tree logger, I can also check that there is regular speed increase.
They get very closed data. (usually less than 1 km/h difference)
622kmh.jpgComment
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