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Feb 04, 2014, 06:26 PM
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Grapp68's Avatar
I also like you said tonight I used the heat gun lightly from 30-40 cm.
With the use of supports on the vertical fin,and slight pass...here is the result

CAUTION not to exaggerate!!Do a little at a time!
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Feb 04, 2014, 06:28 PM
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I'm sorry to hear about the QC issue but, perhaps, I can offer a suggestion? One can straighten a horribly deformed glass fuse by carefully cutting along the bottom seam of the fuselage, making a jig (I have used cardboard boxes with success.), tack gluing the seam to hold the proper shape, and gluing on a strip of glass cloth to keep it strong enough. One needs to be careful about adding too much weight to the tail under the guise of "reinforcement" but it can be done without too much problem.
Feb 04, 2014, 07:47 PM
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Matty12's Avatar
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Very glad you got yours sorted Grapp!! Fantastic!

I still hope you can sort yours Andy!
Feb 05, 2014, 03:32 AM
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Andy1248's Avatar
I am encouraged by Grapp's success. I am also discouraged by Hobbyking's total lack of customer support on this, have not even acknowledged my request. Perhaps I am expecting too much from HK. Looks like us modellers are on our own when it comes to fixing problems like this.
I shall attempt a fix this evening and report back
Feb 05, 2014, 08:05 AM
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Grapp68's Avatar
I try to put a design to better understand how I have done...

The procedure should be repeated 5-6 times and very slowly!!And never apply excessive force!!
I'm sorry that the model does not receive due acknowledgment from the HK assistance
Last edited by Grapp68; Feb 05, 2014 at 08:10 AM.
Feb 05, 2014, 01:13 PM
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I have been fairly fortunate in my dealings with HK but I have no illusions either. I purchased to sets of plastic 11X6 prop blades and they proved to be dangerously defective with two blades breaking in the air and large voids in the plastic. As far as i can tell, HK is still selling these props.

The sad fact is that Chinese companies achieve their low prices, in part, by skimpy quality control and shipping a certain amount of faulty items. HK knows this and doesn't seem willing to take up the slack and, even if they offer a cheerful exchange, the cost of shipping generally leaves the buyer taking the loss.
Feb 05, 2014, 03:32 PM
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Unfortunately this is very true, but we all like to watch our cash and are tempted by the low prices. Not always a good idea but sometimes it is good value.

Anyway, good news, I have a straight fuselage:



Thanks for all your help and advice. Just need some good weather but at the moment it is blowing a gale. Very Stormy. Not good weather in Europe at this time.

http://www.bbc.co.uk/news/uk-26042990


PS - I have put 56 grams of lead in the nose to get it near the COG is this same for others?
Last edited by Andy1248; Feb 05, 2014 at 05:32 PM.
Feb 05, 2014, 05:57 PM
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Matty12's Avatar
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Fantastic Andy!

56g sounds like a bit more than I used, I neglected to weigh my ballast before I made extra mods to mine, are you using closer to 60mm cg? I'm sure she will fly nicely like that, good luck with your weather and fingers crossed for a maiden soon!

Weather here is pretty stormy too, we had wicked lightning last night, but it's very hot. No rain or wind right now, fingers crossed I can get a few flights in today. My cameras hooked up so I might have some footage tonight
Feb 05, 2014, 06:19 PM
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Grapp68's Avatar
Quote:
Originally Posted by Andy1248
Unfortunately this is very true, but we all like to watch our cash and are tempted by the low prices. Not always a good idea but sometimes it is good value.

Anyway, good news, I have a straight fuselage
Thanks for all your help and advice. Just need some good weather but at the moment it is blowing a gale. Very Stormy. Not good weather in Europe at this time.
The fun does not fail!!
Perfect Andy
Feb 05, 2014, 11:00 PM
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Matty12's Avatar
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Er, I had some problems..


Pulled up too hard and snapped the wing. My fault completely, I was having a bit too much fun and exploring the acrobatic envelope

She's completely repairable, maybe I'll add some carbon spars when I repair. I just need to remember that it's not a foamie!
Feb 06, 2014, 02:43 AM
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Matty12's Avatar
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Dragonfly FPV Maiden (4 min 51 sec)
Feb 07, 2014, 04:01 AM
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Hi,

i got my Dragonfly on monday, without twisted fuselage. I will use a 7x4 prop with the stock motor.


Sebastian
Feb 07, 2014, 12:28 PM
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Andy1248's Avatar
My Dragonfly is already to go for its first flight. I just have to wait for break in this awful UK stormy weather.
Installed is:

NTM Propdrive 2836 1000kv Brushless Motor
40mm Robotbirds Ali Spinner
10x6 Folding Prop
Turnigy 30A ESC
FrSky V8R II Reciever
FrSky Taranis Transmitter

Wattmeter test indicate:

WOT = 11.2 Amps at 117 Watts on the 10x6.

11.2 Amps sounds OK and should not cause any overheating.

Flight report to come.
Feb 07, 2014, 02:07 PM
WAA-08 THANK FRANK!
JimNM's Avatar
You are dangerously underpowered at 117 watts. That may work for a 16-20 oz plane. How much does your glider weigh?

How much voltage is the esc getting? Looks like 2s or about 8 volts.
Feb 07, 2014, 02:56 PM
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Andy1248's Avatar
3S 2200ma LiPo.

I must admit I was surprised the figures were so low. No doubt if use the stock 11x6 it will take more current and have more Watts.

The Hobbyking data for the Motor is:

Prop Test Data:
11x7E - 11.1V / 220W / 20A / 976g thrust
11x7E - 14.8V / 412W / 27.7A / 1.485kg thrust
12x6E - 11.1V / 215W / 20A / 1.08kg thrust
12x6E - 14.8V / 430W / 29A / 1.42kg thrust
13x4E - 11.1V / 223W / 20A / 1.06kg thrust
13x4E - 14.8V / 400W / 27A / 1.48kg thrust

Looks like if I can get the current up to 20A with a larger prop it will work.


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