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Old

GPS + Re-calibrated 720 + DX7 LAYUP

Posted 02-24-2014 at 06:50 AM by nickyd
Updated 03-05-2014 at 06:54 PM by nickyd

old DX6i settings:
Trav adj
Thr down78 up 100
El ail pit 125
Ru gyro 100
Gyro 0 48 1 53
Throtl 30% , 70% and 100% for castle gov
2 servi 90 deg
Rudd - rev
Throt hold -2
Timer 5:30

Georgi Post on DX7 setup for GPS:
http://www.helifreak.com/showthread.php?t=504444&page=4
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Old

15-02-14

Posted 02-15-2014 at 08:25 AM by nickyd

4 flights. cyclic feels perfect.
Set 30 expo on tail in SK
30 expo on cyclic.
Blades quite loose in holders
one battery is dying. see vibe on skids as rpm drops at end of flight.
Vibe score=0.4 . on examination is very low (0.2 at 2600)but with spikes when flipping inverted. could this be the loose blades?
SL set to 150% . works fast but theres a big lean to left after doing flips and rolls.

Video is perfect. Best ever with no occasional shudder...
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Old

11-2-14

Posted 02-11-2014 at 07:30 AM by nickyd
Updated 02-14-2014 at 05:18 AM by nickyd

set SK:
reduce control rates to 210/240 as default /bell gain goes down automatically).
reduce cyclic gain to 50 default.
check self tune bell again.
hd down to 75.

set Tx:
Expo: set cyclic to 25 (was 20) . Set Tail to 30 (was 40)
DR: set both banks to 100%

Flight good but roll a bit slow. need to up the rates. may need more expo on cyclic in this case. vibe 0.4 at 2800

next test E/A 230/260 with 30 Expo. Heli and tx configured...
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Old

10-02-14

Posted 02-10-2014 at 12:06 PM by nickyd

3 flights
loosen main blades. now smooth and not too tight to move rather than sticky tight. This removes shake on spool up/down and reduced vibe level slightly.
Windy. this is visible in vibe graph.
score 0.4 at 2600 and 2800. 2800 smoother on graph.
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Old

08-02-14

Posted 02-08-2014 at 05:52 AM by nickyd
Updated 02-09-2014 at 07:22 AM by nickyd

Re-level SK removed from heli on bench.

Re-fit SK720 with SK black gyro tape (used) with no metal plates. seems to stick ok, but need to keep an eye on it and replace soon.
flight very shaky: tape was not good plus loose screw on mast block.
re-install plates and zeal.
shorten top bearing block screw and apply lots of locktite
quick hover. vibe 0.3 no shakes
flights x2 vibes 0.4 during sport flight.
try strapping sk down with fuel tube. increases...
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