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By Nigel on Saturday, 25 October 2008 6:29 PM
This was more a flight just to use up the remainder of the fuel in the tank.

I had adjusted the slave link by shortening one turn it to try and sort out the blade tracking.  This appears to have fixed the blade tracking, but I will need to get it into a decent hover to check and given the lack of space in the front yard, it is a bit hard to hover at eye level.

What is disturbing is a bad harmonic vibration that is causing the vertical tail fin to shake violently.  I will have to search...
By Nigel on Saturday, 25 October 2008 11:00 AM
Headed down to SARCH for the usual Saturday morning fly session.

I was eager to see how the TRex 600 would go with the new fuel, enya #3 plug and new fuel line.

I reset the main needle back to 1.5 turns out, which is what had been suggested as a starting point.  It started easily and idled smoothly (as it always has), so I made the trek out to the flying field and set the heli down.  I took my spot and turned off the throttle hold and proceeded to spool up. 

There was only a very slight boginess on spool up, but no where near as bad as last weekend and I was able to get past the flat spot very easily.  I kept feeding in throttle and she left the ground.  I hovered around, battling the wind and after about 2.5 minutes landed to check the temp.  The temp on the backplate was luke warm, so I leaned the main needle a couple fo clicks and then spooled up again.  There wasn't the bogginess like before, so I assume the earlier bogginess was from the long period of idling.  I continued to hover for about another 2.5 minutes before landing again.  Backplate temp was warmer, but still not burning to the touch.

...
By Nigel on Saturday, 18 October 2008 12:10 PM
Went down to the field today (as usual for a saturday morning)

I spent time with Bruce and Melvin trying to sort out the tuning of the heli.  1 click clockwise and the engine would run too hot and lean, 1 click CCW past the original mark and it would be running too rich.

At one point we checked the fuel filter, and it was clogged with a blue gelatinous material.  We cleaned this out and it made a small difference.  I cleaned it out some more once I got home.

Managed some hovering,...
By Nigel on Friday, 17 October 2008 6:10 PM

Got the nerve up to do some testing in the driveway out the front of my house.

Spooled up and managed to hover for a couple of minutes, then the engine died.  Started first pop, spool up then die about 30 seconds into the hover.  I did this, adjusting the main needle trying to get it to run smoothly, but to no avail.

I also managed to test the governor, which works :)

By Nigel on Saturday, 11 October 2008 6:29 PM
Well I finally got her into the air. My maiden flight with the TRex was even caught on video.

There is still a tuning issue, as I had the motor cut out on me 3 times whilst hovering, forcing me to perform some "Mini-Autos".  The heli was only about 2metres off the ground, but was nice knowing that I would be able to pull off a full auto if required.

The blade tracking needs to be adjusted as they are ever so slightly out.  I reckon about 5mm.  Unfortunately I wasn't able to determine...
By Nigel on Saturday, 11 October 2008 6:27 PM

It was the first weekend in ages where the wind hasn't picked up too strong down at SARCH.

I did a nice comfortable flight, with nothing more than tail, left and right side in hovers with some piros.

Tail held well, but still has a slight drift.  I should get it sorted out soon.

Flight #105 : Battery #5 took 1936ma to charge in 68:43mins for a 7min flight

By Nigel on Thursday, 9 October 2008 5:32 PM
Weather was again nearly perfect.  Slightly gusty breeze, but not too bad.  Temp would have been 18ish

I have increased the head speed up to 85% for normal flight mode :)

Mainly spent hovering around.  The wind was a bit gusty blowing the heli around the place, so was nice being able to control it with the higher head speed.  There isn't a huge amount of difference in blade noise with the increased head speed, but the heli is definately more lively.

I shortened the long link of slave blade which has brought tracking pretty close to spot on.

...
By Nigel on Wednesday, 8 October 2008 8:00 PM
It was a beautiful afternoon for flying.

I have done some changes to the transmitter since my last flight.  I have reduced the stick tension to minimum.  This has made such a difference to my control of the heli.  I was surprised at the difference it made.

The first flight for the day i used primarily normal mode with a 0-60-75-INH-75 throttle curve, with some short stints in ST-1 which has a 0-65-82.5-INH-82.5 curve.

I spent the flight performing basic hovers, with tail, left...
By Nigel on Sunday, 5 October 2008 11:15 AM
Im going to call this a flight, even though the heli didn't make it off the ground.

It wasn't so much as a flight, but ended up being more trying to iron out a few little bugs.

The motor is running way too rich, with the engine cutting out in transition from low to mid.  This effectively meant the heli could not get enough head speed to be able to hover.

The tail was also very sensitive, so I reduced the endpoints down to about 30%.  I also applied expo to elevator, aileron and...
 
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