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Old Nov 02, 2011, 09:25 AM
Hot Dawg Glider Pilot
schrederman's Avatar
United States, TX, Weatherford
Joined Nov 2002
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Since the Dragonfly Strong spar is constructed the same way... you're not too far off base...
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Old Nov 19, 2012, 01:39 PM
FLY FOR FUN - GLIDE FOR LOVE
pablo pinto's Avatar
United States, FL, Miami
Joined Jan 2011
51 Posts
DragonFly Strong

Hi, i am new in the teme of sailplanes and gliders and i have a Dragonfly Strong and a BLIZZARD 3.4 meters but i wanna convert to electric because now i am living on a flat area and i would like to have an electric gliders can you give me an advise if is posible to convert this beutifull birds to electric, and what motors do you recomend , i have the motor MVVS 5.6/690 http://www.espritmodel.com/mvvs-46-5...ess-motor.aspx and i wanna know if this motor is good or is too strong for this bird or what motor do you recomend.
Thank you.
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Old Nov 19, 2012, 02:17 PM
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Woodstock 1's Avatar
Ireland, County Kerry, Kerry
Joined Dec 2005
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I think that should work fine. That web link gives you good starting point for the size of the other components you will need too...

Chris
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Old Nov 20, 2012, 02:24 AM
FLY FOR FUN - GLIDE FOR LOVE
pablo pinto's Avatar
United States, FL, Miami
Joined Jan 2011
51 Posts
thank you Woodstock 1 .
so do i have to change the CG if i convert to elctric or the original CG is fine?
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Old Nov 20, 2012, 05:44 AM
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Woodstock 1's Avatar
Ireland, County Kerry, Kerry
Joined Dec 2005
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Quote:
Originally Posted by pablo pinto View Post
so do i have to change the CG if i convert to elctric or the original CG is fine?
No!

By the way, I found the factory suggested CoG was way too far forward.

Chris
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Old Nov 20, 2012, 01:03 PM
FLY FOR FUN - GLIDE FOR LOVE
pablo pinto's Avatar
United States, FL, Miami
Joined Jan 2011
51 Posts
about the dragonfly

What CG do you recomended if i convert to electric?
Because i try to fund some info or manual but nothing (because i lost the original manual).
Can you help me please.
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Old Nov 20, 2012, 01:10 PM
Proud member of LISF and ESL
LI, New York, USA
Joined Mar 2003
24,549 Posts
Basically you are going to take your DragonFly Strong, a winched plane and convert it to a DragonFly Strong-E
http://www.soaringusa.com/DragonFly-Strong-E.html

Likely you could just buy the E fuselage and retain the one you have for Hi-start/winch/slope

CG would remain the same, in terms of starting point on the specs, then you tune to taste. Pablo Pinto prefers his CG more rearward. Your smileage may vary.
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Old Nov 20, 2012, 01:13 PM
Registered User
Lexington, KY
Joined Jul 2003
163 Posts
Dragonfly Strong

Hi Pablo: The sialplane version that i am flying is around 68 oz. The motor that you are looking at puts out approx 700 watts. If you add battery weight and motor weigh I am guessing that it would be closer 80-85 oz if you eliminate the receiver pack. This works out to ~135-140 watts/lb which should give it vertical performace at peak power. Quite frankly 400 watts with a cheap outrunner would be all you need and give it a healthy climb rate.
Cheers
AJ
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Old Nov 20, 2012, 02:46 PM
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GliderJim's Avatar
Michigan, USA
Joined Jul 2006
578 Posts
Pablo - I found this post that says after some testing that he ended up with 4 3/8" back for the CG...
http://www.rcgroups.com/forums/showp...99&postcount=1
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Old Nov 20, 2012, 07:59 PM
FLY FOR FUN - GLIDE FOR LOVE
pablo pinto's Avatar
United States, FL, Miami
Joined Jan 2011
51 Posts
about the dragonfly

aeajr , ajbhatta Glider Jim , thank you very much for the info i going to work now and i hope to do the fly this weekkend ,i will send you the pictures or video to show you how this bird flys.
Thank you very much for your help :
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Old Nov 21, 2012, 09:17 AM
Registered User
Lexington, KY
Joined Jul 2003
163 Posts
I flew mine with CG about 102 mm back from LE did OK, considering conversion to electric for ALES type stuff
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Old Nov 22, 2012, 12:05 PM
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Evan D's Avatar
Charlotte, NC
Joined Jan 2004
6,168 Posts
I wanted more vertical. I started with a geared Mega and ended up with a geared Neu. Wonderful glider.
http://www.espritmodel.com/neu-1115g-series-motors.aspx
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Old Nov 23, 2012, 02:02 PM
Registered User
United States, IN, Fort Wayne
Joined Dec 2006
60 Posts
The first Dragonfly

Hi guys,
This is the original Dragonfly. This plane flies like a dream and can thermal with the best. This Dragonfly also qualifies for all woodie contests too. 2013 is going to be a great year
I hope.

WDKK

P.S.
You might know a few of the guys in the background. I keep pretty good company lol
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Old Apr 02, 2013, 02:34 AM
Registered User
Belgium
Joined Oct 2006
3 Posts
Hello all,

I have recently got me a Strong X and building it as we speak.
Just a question on the stabilizer. I would like to make it removable for transport. Is there a way to fix it properly? Or do you all fix the stabilizer in place without making it removable?
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Old Apr 02, 2013, 02:08 PM
Hot Dawg Glider Pilot
schrederman's Avatar
United States, TX, Weatherford
Joined Nov 2002
7,844 Posts
Quote:
Originally Posted by WDKK View Post
This Dragonfly also qualifies for all woodie contests too. 2013 is going to be a great year
I hope.
Due to the molded wing tips, some CDs may disqualify it from woodie competition. Woodies are generally thought to be non-arf types that are built by a modeller... though that isn't stated in the rules as Ray Hayes wrote them. It's just a kind of an understanding... implied, if you will.

Don't get me wrong... I would let you fly it, but some might not. Just be prepared for that.

They are great models...
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