Gaui Hurricane 550 Build

Gaui Hurricane 550

last updated 1-2-2010

Notes on 425 to 550 conversion
Configuration
Flight Notes
Assembly Tips

1-2-2011 I now have the BeastX flybarless unit in my heli and I am very impressed. I'm going to do a setup page for the BeastX including how I ran the servo wires. Hopefully I will have this done this week.

Gaui Hurricane 425/550 Plastic frame version Notes

As with many others at IRCHA 2009 I bought the 425. They had a great deal going to promote this heli. During one of the Gaui seminars I found out this 425 kit can easily be converted to a 550. So after IRCHA I did about a week of researching what I needed to get it going. My goal was to have a long flight time and have everything run cool. Many others reported that the Z-Power z20a-980 with 14/20/50/61 gearing was a great combination. After many flights I can say this is a great combination for sport flying or smooth 3D. With a 2650mah pack I get 7.5 minutes of flights. The motor and battery both are around 110F. ESC does not feel warm at all but data log indicates an average of 110F.

What I did to convert the kit:
The 425 comes with the 50t and 61t gears but you will need to buy the 14t and 20t:
901401 14t pinion gear (not included in kit, make sure you order this)
204583 20t one way gear (not included in kit, make sure you order this)
And of course the tail boom, belt, and tail control rod will need to longer:
865001 572xl belt
204191 tail boom
204195 tail control rod
(note: the 3 parts above are in a stretch kit part# 204663)
The blade grips use 3mm bolts and most 550mm blades have 4mm bolt holes. I used a metal sleeve from a Raptor. This sleeve is made to go over a 3mm bolt and have a 4mm ID bearing on it.I had to cut it to the right length and push it into the blade grips. It worked great. You could probably find some metal tubing to do the same thing.
KBDD 85mm tail blades <weblink> The tail blades that come in the 425 kit are too small for 550 blades. The tail will blow out very often.

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Configuration (1-2-2011 now Flybarless):
Spektrum DX8 <model file>
Gaul Hurricane 425 kit
204682 Flybarless head with driver and rods (no links, not sure why, I used Rocket City)
BeastX microBeast flybarless controller
865001 572xl belt
204191 tail boom
204195 tail control rod
(note: the 3 parts above are in a stretch kit part# 204663)
Fusuno unpainted fiberglass canopy <weblink>
Z-Power z20a 980kv <weblink>
901401 14t pinion gear (not included in kit, make sure you order this)
204583 20t one way gear (not included in kit, make sure you order this)
Castle Creation ICE 75 <weblink>
3 Hitec 635HB
Futaba 9254 tail servo
Spektrum AR7000 receiver
Spektrum TM1100 telemetry
RotorTech 550's
KBDD 85mm tail blades <weblink>
TP2650-6SP45 Thunder Power Pro Power 2650mah 45C
Zippy FlightMax 3000mah 6S 20C (requires modification of frame)

Note: When I was running a flybar I really liked my KBDD 50 size paddles (3mm flybar) <weblink>. They were still smooth in flight but increased the cyclic rate a good amount. I think the 550 kit comes with lighter paddles. I flew the ones that came in the 425 kit for a while but 3D the KBDD paddles are a big improvement.

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Flybar'd flight notes:
With the 2650mah 6S pack I get 7.5 minutes doing smooth 3D (piro-flips, twisted rainbows, snakes, etc.) with a head speed of 1900rpm. The built-in data logger in the CC ICE75 reports hover as 17.5A, average doing smooth 3D is 20A with the maximum spike of 42A. The data logger reports the internal temperature of the ESC to have an average of 110F with max of 115F. Using an infared temperature gauge indicated the battery would range from 105F to 115F just depending on how agressive I flew. The throttle curves are: N=0,80,85,inh,100 FM1=100,inh,90,inh,100 FM2=100,inh,95,inh,100. Pitch curves are N=25,inh,60,inh,90 FM1=5,inh,50,inh,95 FM2=0,inh,50,inh,100. The Pitch range is -11 to +11 with cyclic range of 10 degrees.

Flybarless Flight Notes:
1-2-2011 I will put more info up as I collect data.
Head Speed 1800. Collective pitch range +12 to -12. Cyclic setup as per BeastX instructions for 6 degrees. Servo arms on cyclic had the balls moved in to 9.5mm from center.

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Assembly Instructions:
Page 1: Frame Assembly
Page 2: Landing gear
Page 3: Elevator, Pitch, & Roll levers

10-24-2010 Radio Setup - eccpm section
1-2-2011 I will put up a flybarless setup page for the BeastX in the next week.

Does not indicate how to mount servos

Left servo rods 80 mm