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Old Jun 14, 2005, 05:05 PM
djiusa.com / uavproducts.com
United States, MI, Goodrich
Joined Mar 2004
3,846 Posts
ECO 8: keep breaking Head bolt (jesus bolt) and Phx 45 start up problem?

I have my brothers Eco 8 for trimming and tunning. I have the latest Phx software 1.14 installed on the Ph45 in gov mode and start up set at softest. When I spool up it does a quick "jerk" and then spools up slowly to set throtlle setting of 90% before switching to idle 1 of 90%.

I would assume that the head bolt is breaking due to the start up problem.

Any thoughts/help?
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Old Jun 14, 2005, 08:07 PM
X-Era Motors
DavidB.'s Avatar
Newport, NC
Joined Jan 2002
2,225 Posts
The head bolt is garbage. Replace it with something harder and you shouldn't have problems.
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Old Jun 14, 2005, 08:53 PM
Registered User
San Carlos, California, United States
Joined May 2002
7,640 Posts
Quote:
Originally Posted by rerazor
I have my brothers Eco 8 for trimming and tunning. I have the latest Phx software 1.14 installed on the Ph45 in gov mode and start up set at softest. When I spool up it does a quick "jerk" and then spools up slowly to set throtlle setting of 90% before switching to idle 1 of 90%.

I would assume that the head bolt is breaking due to the start up problem.

Any thoughts/help?
I'll bet you have a Mega 22/20/3H.

I reported this problem to Castle Creations many times in the past, went through about three firmware versions waiting for it to be fixed, was never fixed, so replaced it with a Schulze 18.46k.

This was three years ago...looks like they still haven't fixed it.

Toshi
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Old Jun 14, 2005, 09:11 PM
djiusa.com / uavproducts.com
United States, MI, Goodrich
Joined Mar 2004
3,846 Posts
I'm running a Hacker B50 14L. I switiched to fixed throttle and didn't change any other settings and I do NOT get the 'jerk".

So it has to do with the Gove mode.
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Old Jun 14, 2005, 09:33 PM
CD-ROM Junkie
Art Newland's Avatar
United States, WA, Bellingham
Joined Apr 2001
13,910 Posts
I couldn't get mine to stop the "jerk startup" (Px-45) until a softened the throttle curve on the low end, now it starts very smooth. But I'm using fixed throttle mode.
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Old Jun 15, 2005, 09:09 AM
djiusa.com / uavproducts.com
United States, MI, Goodrich
Joined Mar 2004
3,846 Posts
I guess I will just have to set it at Fixed pitch. In Gov mode the startup is so violent that it eats the main gear and breaks the bolt. Its to bad I really wanted to use Gov mode.

I'll just set the TC at 100 95 90 95 100 in idle 1
Norm will be 0 inn 90 90 90

Thanks
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Old Jun 15, 2005, 12:34 PM
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United States, FL, Cocoa
Joined Sep 2001
4,197 Posts
Hello, it sounds like you guys need some Kontronik ESC's . They're as smooth as they get in soft starts and just about everything else. I've used the garbage bolt together with this ESC and never broke it during start up.

When I first started though I had a real violent JetiESC/Phasor combo. My fix was to spool up the blades by hand (just a bit) and then start up the throttle. Much better; should work with your CC too.

Good luck!

Chachin..
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