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700 Class Electric Helicopters 700 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 01-30-2011, 04:51 AM   #1
Fredrik R
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Default First testflight with HK4525-520LE. WOW! And tailfailure...

Got my 4525 this week.
AWESOME power! No bogging at all.
Now we talking BIG SMILE

Filmed it and just testing the power and logging it.

6200 watts and 150amp...

Lost tail control during flight

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Old 01-30-2011, 05:20 AM   #2
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nice flight lucky ending,i thought that bit was a week spot some poeple are pinning them,got one on my 550e think im of to do the same.
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Old 01-30-2011, 10:28 AM   #3
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Very nice save Fredrik !
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Old 01-30-2011, 11:54 AM   #4
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Nice! Great SAVE!

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Old 01-30-2011, 12:28 PM   #5
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That was pro stuff
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Old 01-30-2011, 01:25 PM   #6
Fredrik R
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Thanks!

Have JB weld the rod ends now
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Old 01-30-2011, 02:58 PM   #7
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Yes JB weld works great on the quickuk carbon tail rods Great save!
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Old 01-30-2011, 03:11 PM   #8
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Pulled 198 Amps on the 4525 a couple of days ago !!
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Old 02-02-2011, 12:06 AM   #9
Fredrik R
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198 amps! Thats much!

Logged yesterdays flight. This motor got power!
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Old 02-02-2011, 04:10 PM   #10
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would have thought that it would have kept the Hs more consistent with all that power
whats your gov gain?
Also were your lipo's kept warm before the flight?

That was a really nice save I didn't think you were gonna make it
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Old 02-02-2011, 09:21 PM   #11
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Is the cause the carbon rod coming out from its threaded end? What options are there for prevention?... PS... Fredrik... you are one bad man Sir!!!! That was some serious skill under pressure....
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Old 02-02-2011, 11:50 PM   #12
Fredrik R
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Have not touch the gov gain. It's a PowerJive 120HV. Could raise the gain little, but it feels good in the air.

The temp of the batteries were around 15-20 degrees C.
Ambient temp was -2 degrees C.

The carbon rod has been JB welded now. Booth ends
Had CA them before. So don't use CA and try to pin the rod!
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Old 02-03-2011, 12:03 AM   #13
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Quote:
Originally Posted by Fredrik R View Post
Have not touch the gov gain. It's a PowerJive 120HV. Could raise the gain little, but it feels good in the air.

The temp of the batteries were around 15-20 degrees C.
Ambient temp was -2 degrees C.

The carbon rod has been JB welded now. Booth ends
Had CA them before. So don't use CA and try to pin the rod!
+1 on the JB Weld, also file some nicks in the metal pushrod to give the JB Weld something to bite into.
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