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Old Dec 07, 2012, 10:07 PM
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Hawaiian Flyin's Avatar
Maui, Hawaii
Joined Dec 2007
316 Posts
Managed to get another flight in today. Moved the battery back a bit. Was able to lift off quicker and fly a bit slower BUT it seemed less responsive while turning. May just go back to the original setting. Also noticed after just 3 flights the wheels showing some significant wear. Might be from the rough asphalt runway or just my not so smooth landings.
Video can be seen here.:
GOPR0148222 (5 min 59 sec)


Ming:
Has my 787 shipped yet? If it has can you give me a tracking number? I will be going on vacation next week so will have my neighbor looking for it. Dont want to have it delivered and sitting on my driveway for days on end.
Thanks
Hawaiian
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Old Dec 08, 2012, 02:22 PM
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We have short grass, but had to hand launch, as it wouldnt pick up enough speed on the ground.

Was a bit hairy, on the edge of stall and dropping the wings for the first 20 metres of the climb.

Had to put in a fair bit of up elevator to trim her out, maybe a bit nose heavy, but is spot on 5mm from wing line.

Also a bit of left alieron trim, as if the wing is slightly twisted, but could be the fact there was a little packing damage to the right wingtip.

Slips through the air nicely when up to speed and looks very scale, but battery got pretty hot and needs full throttle 90% of a flight ( so only 5 mins flight time ).

I think its a fly once or twice in the summer plane, as its a pain having to hand launch.
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Old Dec 08, 2012, 04:56 PM
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Maui, Hawaii
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What battery are you using? I flew mine for a little over 4 minutes at 2/3 to 3/4 throttle and the battery was not too hot at the end of the flight. Put it on my battery checker and showed 39 percent of the battery capacity left.
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Last edited by Hawaiian Flyin; Dec 08, 2012 at 06:28 PM.
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Old Dec 08, 2012, 06:17 PM
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Brand new Gens Ace 3300 3S 30C, which had 36% left after 5 mins.
Try not to go under 30% for longer service life.
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Old Dec 08, 2012, 06:36 PM
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Maui, Hawaii
Joined Dec 2007
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Weird. I'm using a Turnigy 3S 3300 30-40c discharge pack thats about a year old and my plane flew ok.
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Old Dec 08, 2012, 06:56 PM
Don't Move I've Dropped My Nut
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United States, AL, Huntsville
Joined Feb 2009
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Quote:
Originally Posted by AMARC View Post
Brand new Gens Ace 3300 3S 30C, which had 36% left after 5 mins.
Try not to go under 30% for longer service life.
You might put battery thru 3 or 4 charge/discharge cycles before you use it in the plane again Did you check the ESC's programming.....especially the throttle endpoints?
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Old Dec 09, 2012, 05:16 AM
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Australia, QLD, Toowoomba
Joined Oct 2011
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Just a quick update, one of the 70mm edf's is in tested and running smooth, it was a shoe horn fit, should get the second one fitted by Tuesday and a maiden-test flight Wednesday

Mike
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Old Dec 09, 2012, 07:16 PM
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Maui, Hawaii
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Good luck. Post some video of the flight. Really curious as to how it flies with the 70mm fans. should be fast!
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Old Dec 10, 2012, 05:36 AM
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Will the supplied motors take 4S voltage ?

I need more thrust if i am to get this off the grass, cant keep hand launching and fighting for control for 10 seconds, will end in tears.
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Old Dec 10, 2012, 09:20 AM
Don't Move I've Dropped My Nut
bamaguy's Avatar
United States, AL, Huntsville
Joined Feb 2009
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Quote:
Originally Posted by AMARC View Post
Will the supplied motors take 4S voltage ?

I need more thrust if i am to get this off the grass, cant keep hand launching and fighting for control for 10 seconds, will end in tears.
Suggest that you e-mail Ming with the question
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Old Dec 10, 2012, 09:28 AM
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Hong Kong
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Quote:
I need more thrust if i am to get this off the grass, cant keep hand launching and fighting for control for 10 seconds, will end in tears.
Please check how many amps to draw from battery.

Ming Lou
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Old Dec 10, 2012, 12:07 PM
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so motors will be ok on 14.4V, but the ESC are the limiting item ( 30a ? each ) if current draw is to high
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Old Dec 10, 2012, 07:23 PM
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Can't run 4 cells on this motor.
The same motor and esc was very successful on other PNP plane.

Ming Lou
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Old Dec 10, 2012, 07:40 PM
Don't Move I've Dropped My Nut
bamaguy's Avatar
United States, AL, Huntsville
Joined Feb 2009
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Quote:
Originally Posted by AMARC View Post
so motors will be ok on 14.4V, but the ESC are the limiting item ( 30a ? each ) if current draw is to high
A pair of these will more than do the job......but you will need a quality LiPo around 4000/40C (at least)

http://www.pw-rc.com/product_info.ph...oducts_id/2017
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Old Dec 10, 2012, 10:42 PM
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Maui, Hawaii
Joined Dec 2007
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Anybody try weighing their planes? I weighed mine and it came in at 1675 grams or 3 lbs 11.2 oz. with the battery. Mine is painted and has 2 coats of WBPU on it.
Hawaiian
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