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i will try ! Pierre

Some recent pictures

Hi, I am looking for an update regarding lipos cells. (If there is already an existing topic let me know !) Which vendor do recommend for an heavy usage (70 to 80 amp) with long lasting performance ? what is the internal resistance of the cells ? What is you experience abour Nano tech cells...

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 : 1,4 meter, eg a pressure of 0,13...

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 : 1,4 meter, eg a pressure of 0,13...

I use oil and teflon tube for a 1/4 flex at 30 000 t/mn. I would add that the best solution depends on the flex size and the rotation speed : I would use: teflon only for small flex at any speed Grease for large flex at low speed eg 15000 t/mn Oil and teflon for large flex at high rotation...

Hi, I have made some rough calculation on a rigger. There are at least three sources of drag : air drag, hull drag on the water and rudder drag. You may had tne turn finne. Air drag is between 1/10 & 1/20 of the total drag and mainly due to the hull surface and not to the booms. Rudder and...

Some update. Construction is over. It 's now working with teflon and oil : less noise and vibration. The rigger is running fine (over 80 mph). Some tunning are still needed to avoid oil leakage. :D Regards Pierre

A new motor mount Regards Pierre

Some navigation pictures and video http://www.youtube.com/user/scyllias.../2/C32EwV5K4a0 http://www.youtube.com/user/scyllias.../0/ey-ZoP7gC6M Pierre

Thanks ! :) Pierre

MitjaJ do you have any pictures ? 2,5 mm for 5 kW : did you experiment it ? regards Pierre

Latest wideo http://www.youtube.com/user/scyllias91?feature=mhum#p/a/u/2/C32EwV5K4a0 Pierre

Some videos http://www.youtube.com/user/jfp2p#p/a/u/1/yCv1GHzCqHA

Some videos The pound was a bit too small. Regards Pierre

40% is a lot.. but I am not the designer. :)

I would try to place the battery between the two sponsom stick. On the picture, there micht be to much weight on the strut. Regards Pierre

Jim How do you calculate the weight needed on the strut ? Based on my experience,I have make a calculator based on rpm and prop diameter but I am not sure it is accurate : Strut weight should be equal to prop lift. This calculator does not take into account the real prop shape, eg a 1450 would...

Yes Jim I agree, there is not enough weight with this sturt angle. On the video it is 2°. With 1°, the back of the rigger does not bump any more Weight on the prop can be adjusted between 0.8 to 1.2 kg (eg between 28 and 42 oz) depending on the lipo position. Regards Pierre

hi some videos here : The start : http://www.dailymotion.com/video/xes4j1_demarrage-epr_sport first run, whaouh what are the swans doing here. By the way the strut angle is to high http://www.dailymotion.com/video/xes4t3_run-epr-2_sport Another run (still too much angle) ...