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Old Jun 08, 2014, 04:28 PM
build what you fly!
Mark Haley's Avatar
United States, NH, Goffstown
Joined Jun 2011
44 Posts
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Bubble Dancer #2 - Done!

Hello All,

Bubble Dancer #2 All done!

100% scratch built featuring:
Custom designed and molded fuselage
Custom carbon tailboom
Custom v-mount
Hand-cut ribs
AUW ready to fly weight came in at 34.2 oz. (970 grams) compared to the 31.3 oz (888 grams) design weight. This a little higher than I had projected in my previous post - maily due to the fact that I hadn't done the end-rib fiberglassing and tail fin fiberglassing at that time... And the black trim (letters and swooshes)

As mentioned before, I made several component choices that brought the weight up - so in the interest of comparing the build itself to the target, these are the overages:
Fuselage paint: 15 grams (I shaved 5 grams off previous post by wet sanding the fuse.)
Tailboom: 12 grams (My best boom came out at 48 g. vs 36 g. specified.)
1300 mAh battery: 8 grams (Got some great new battery packs yesterday from hangtimes.com that had shorter leads and less weight.)
3 digital servos: 13 grams (I just wanted digital servos...)
Power Switch: 11 grams (for convenience.)
Black Ultracote trim: 12 grams (just had to do it...)
Total Overages: 71 grams

Sooo... 970 - 71 = 899 grams or 11 grams (1.2%) over on the build itself... I'm prety happy with that - looks like a little more glue control is in order.

As always the complete build log is on my website www.aviatorstudio.com I have added new content to the site over the last few days, but there is still more to come.

Thanks for letting me share!

Mark


P.S. Nope... haven't flown it quite yet.
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Old Jun 08, 2014, 04:53 PM
Little Red Plane
United States, TN, Knoxville
Joined Dec 2012
559 Posts
Mark,
VERY NICE build!
Your builds are inspirational to so many
Thank you for sharing and for your excellent website.
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Old Jun 08, 2014, 05:55 PM
Registered User
United States, VA, Norfolk
Joined Sep 2007
433 Posts
Really nice work! Congratulations!
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Old Jun 08, 2014, 07:53 PM
registered weapon
IHAVAWDY's Avatar
United States, MT
Joined Mar 2008
3,265 Posts
Very nice. She looks light just sitting in the grass.... have some fun.
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Old Jun 09, 2014, 06:33 AM
Registered User
Australia, NSW, Wauchope
Joined Jan 2012
315 Posts
Nice one.
Love your website too.
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Old Jun 09, 2014, 06:53 AM
Proud member of LISF and ESL
LI, New York, USA
Joined Mar 2003
24,476 Posts
A friend just built a Bubble Dancer for me. Have not put it in the air yet. No where near as light as yours. You do amazing work.
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Old Jun 09, 2014, 06:57 AM
Registered User
Romania, Dolj, Craiova
Joined Sep 2007
14,994 Posts
Are there any chances to have the wing dismountable in three parts and keep weight reasonable ?
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Old Jun 09, 2014, 07:36 AM
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George Franklin's Avatar
Joined Feb 2013
424 Posts
Very nice!
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Old Jun 09, 2014, 10:02 AM
build what you fly!
Mark Haley's Avatar
United States, NH, Goffstown
Joined Jun 2011
44 Posts
First Hand Tosses

Hey guys, thanks for the kind words!

The conditions this morning were dead calm so I took the plane out to a small park near my home and did 3 trim and balance hand tosses...

HOLY COW DOES SHE FLOAT! 550 feet straight ahead with a gentle level toss. I had to use the spoilers on all three flights to bring it down before I ran into the trees at the end of the field!

Looks like I got all my rigging done correctly, as no trim was needed... yay! 'Bout the only thing I might do is increase my spoiler / elevator mix ratio just a tiny bit.

On to the proper flying field tomorrow - conditions permitting!

Mark
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Old Jun 09, 2014, 10:27 AM
Proud member of LISF and ESL
LI, New York, USA
Joined Mar 2003
24,476 Posts
500 feet? I am going to call the gravity police on you. You are breaking the law of gravity. 300 feet max allowed on a hand throw.
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Old Jun 09, 2014, 10:33 AM
build what you fly!
Mark Haley's Avatar
United States, NH, Goffstown
Joined Jun 2011
44 Posts
Hello renatoa,

The Bubble Dancer is designed to have three wing sections during normal use. I just took this picture in my shop 5 minutes ago so that you could see it. The Center Panel is also removable from the fuselage via 2 nylon mounting bolts.

The wing joiners are made of basswood or plywood blocks with Kevlar or brass tubes inside them. The joiner rods are carbon fiber. The total design weight of the blocks and rods for both wings are: 68 grams - the ones I built for this glider came out to: 54 grams.

I hope that I have understood and adequately answered your question.

Regards,

Mark
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Old Jun 09, 2014, 10:37 AM
build what you fly!
Mark Haley's Avatar
United States, NH, Goffstown
Joined Jun 2011
44 Posts
aeajr,

Too funny! - I was curious about the distance, so when I got home I pulled the map of the park up on Google and measured the flight path distance on my computer screen...

By the way, must be some friend to build a Bubble Dancer for you! That's a bunch of work! You must have promised him your first-born or something similar...?

Mark
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Old Jun 09, 2014, 10:38 AM
Registered User
Romania, Dolj, Craiova
Joined Sep 2007
14,994 Posts
Sure, thank you, no idea why that build jig from your site fooled me the wing is an one piece...

You should start offering this bird for sale in various build stages, I surely would buy an uncovered wing.
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Old Jun 09, 2014, 11:00 AM
build what you fly!
Mark Haley's Avatar
United States, NH, Goffstown
Joined Jun 2011
44 Posts
Hi again renatoa,

I wondered if the jig caused the confusion... During the build I just inserted the joiner block as part of the initial construction - nice and easy.

Can't go into business building planes... you know how it is - my real job gets in the way!

Mark
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Old Jun 09, 2014, 11:44 AM
Registered User
Hawaii
Joined Feb 2009
1,115 Posts
Mark,

She looks great! You are a master craftsman, great build! Accomplished building that everyone can aspire too. Love your website with all the build photos, techniques, and descriptions. Update and expand them as you have time. Thanks.
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