Razor: After action report

[jrohland]

Having flown the Razor in earnest yesterday, here is the after action report.

The new packs are in the break-in period so, the power system was not pushed hard.

Battery set A: 60.75 amps peak, 2187 watts peak, 34.44 volts dip, 3775MAH (4350MAH packs)

Battery set B: 50.55 amps peak, 1872 watts peak, 35.26 volts dip, 3334MAH (4350MAH packs)

Packs came down slightly warm to the touch. Motor temp slightly above ambient. ESC same temp as ambient.

Razor flew extremely well, very stable in winds gusting to 7 meters per second (14 knots).

When side on, my Razor has a distinct ringing slap sound. We finally decided the belt is slapping the inside of the boom. With advice from an experienced pilot, I have decided to move the tensioner forward one hole.

After I settled into understanding it's flight characteristics, I noticed it wants to slide back and to starboard. I will double check the swash level today. I will also double check the all link lengths.

Overall, it is a truly impressive flying machine.

jrohland

[DebianDog]

Tensioner? Nice option. :smokin:

[jrohland]

Tensioner? Nice option. See http://www.miniatureaircraftusa.com/Support/Instructions/xcell_razor_600e_assembly_manual_current.pdf (http://www.miniatureaircraftusa.com/Support/Instructions/xcell_razor_600e_assembly_manual_current.pdf), page 42.

jrohland

[DebianDog]

:shock: NICE INSTRUCTIONS! 110 Pages!!!

[epc2]

Battery set A: 60.75 amps peak, 2187 watts peak, 34.44 volts dip, 3775MAH (4350MAH packs)


jrohland

Those packs won't last if you're treating them like that 3775/4350=86.78% , too much for new packs , even on packs that are already broken in I don't like to discharge them more than 80% of their capacity.

epc2.

[jrohland]

Those packs won't last if you're treating them like that 3775/4350=86.78% , too much for new packs , even on packs that are already broken in I don't like to discharge them more than 80% of their capacity.Still working out the flight time per charge. Notice the second flight was 76%. I plan to keep it down to about 50% for the first seven cycles per set.

jrohland

[EricLarson]

Just watch the 1st 5 cycles or so pretty close. Lower discharge rates and reduced flight times. To get max life charge to 95% and discharge to 80% left.

Even discharging to 85% or so and charging to full the team pilots are seeing over 200 cycles though. The packs have proven to be very robust. It is always a good idea to cycle them easy for the 1st 4-5 flights though to get them broke in. That is just my opinion.

[r2160]

What motor speedie combo are you running in the razor? What flight time did you get with those output figures?

thanks
Glenn

[jrohland]

What motor speedie combo are you running in the razor? What flight time did you get with those output figures?The ESC is a Kontronic Jazz 55. The Motor a Kontronic Tango 45-08.

The flight times are more problematic because the heli was up and down a few times as we adjusted the gyro, checked belt tension and looked for any loose parts. I don't have precise actual flight time. I was out on the field about 8 minutes the first flight and about 6 minutes the second. Not all that was in the air.

Now that I have installed an Eagle Tree Systems MicroPower E-Logger (http://www.eagletreesystems.com/MicroPower/micro.htm) I should be able to track actual power and flight times with much greater precision.

jrohland

[r2160]

Thats Great, I look forward to seeing some of the data that you post.

Glenn