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Old Nov 30, 2005, 04:32 PM
4 wheels move a body; 2 a soul
Saratoga, Ca
Joined Feb 2004
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Lightest 1.5 M DLG

So what do any of you out there remember being the lightest DLG(AUW)
flying out there now? Would it be a SGII? How much does it weigh?
Walter
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Old Nov 30, 2005, 07:03 PM
Team WC2013 F3K
oakman7004's Avatar
Sweden
Joined Dec 2004
984 Posts
Humbug 3

Quote:
Originally Posted by glderguy
So what do any of you out there remember being the lightest DLG(AUW)
flying out there now? Would it be a SGII? How much does it weigh?
Walter
Weight is only one aspect. It also got to stand those competition launches you need sometimes. Here is my pick of a light DLG glider.

Mattias Hammarskiold HUMBUG 2 has an AUW of 220g=7,75 Oz

and it stands + 200ft launches...several European top pilots have testes to break this lady on launch, but she is still alive and kicking. More info on this thread #69:
http://www.rcgroups.com/forums/showp...1&postcount=69

cheers Jonas Ekman
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Old Nov 30, 2005, 10:39 PM
Registered User
Brisbane Intl, Australia
Joined Apr 2004
172 Posts
oakman7004, that plane is awesome! do you know if he produces them for sale?
Brendan
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Old Nov 30, 2005, 10:53 PM
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Quote:
Originally Posted by oakman7004
Weight is only one aspect. It also got to stand those competition launches you need sometimes. Here is my pick of a light DLG glider.

Mattias Hammarskiold HUMBUG 2 has an AUW of 220g=7,75 Oz

and it stands + 200ft launches...several European top pilots have testes to break this lady on launch, but she is still alive and kicking. More info on this thread #69:
http://www.rcgroups.com/forums/showp...1&postcount=69
Any more details on this layup? Does anybody know what is on the tail?
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Old Nov 30, 2005, 11:04 PM
Team WC2013 F3K
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Sweden
Joined Dec 2004
984 Posts
Hi Brendan,

I'm sorry to say that they don't produce this toysfor the public.

It is actually two brothers (Mattias as mentioned and Stefan Wahlberg), both well known in Europe, who built 2 planes like this trying to reach 70m = 230ft for this years season.

Mabye they will reveal the specifications so you could bag your own wing and fit on a light fuse...

I'll tell them to comment to you!

So, enough about the HUMBUG 2 now on this thread... Guys, more planes and weight, thx! What's out there?

Cheers Jonas Ekman

ps. on the homepage you'll find the log of a +200ft trow with this model. Click Heights http://www.f3k.se/
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Old Nov 30, 2005, 11:15 PM
Team WC2013 F3K
oakman7004's Avatar
Sweden
Joined Dec 2004
984 Posts
Quote:
Originally Posted by space_case
Any more details on this layup? Does anybody know what is on the tail?
Hi Space Case,

The wing is a bagged full carbon wing using 33 g/m2 CFcloth (Stafan or Mattias pls verify). I don't now which foam they used. Tailfeathers are lightweight balsa covered with 12g/m2 carbon "cloth". I'm not sure if they used a reinforced allegro boom, http://tailboom.com/, or not? The fuse is a Fireworks III fuse.

Cheers Jonas Ekman
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Old Nov 30, 2005, 11:19 PM
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I thought it may be cloth, thanks for verifying. That plane is a work of art!
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Old Dec 01, 2005, 12:40 AM
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Joined Jan 2005
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Hi !

Just want to verify some of Jonas statements.
The wing is bagged with 66 grams carbon. The wingarea is just about 17 dm2.
On the tail is as you said balsa with 12 grams carbon tissue.
The fuselage on the picture is a Fireworks 3 original.
Myself made an own fuse (a'la Supergee, but smaller) using a standard tailboom.com.

If someones interested both models are for sale (for the right price)

/Stefan Wahlberg
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Old Dec 01, 2005, 11:47 AM
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Belo Horizonte
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Buss

PM Sent.

André Brasil
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Old Dec 01, 2005, 12:59 PM
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Puuurty! I like the wings with sweep on the tips. Makes it look like the planform of a DuoDiscus wing.
I'm going out on a limb but do the wings have a higher aspect ratio? In the picture it looks like it has a shorter chord than the neighboring plane. http://www.rcgroups.com/forums/attac...hmentid=603544
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Old Dec 01, 2005, 02:26 PM
4 wheels move a body; 2 a soul
Saratoga, Ca
Joined Feb 2004
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I thought the same about the wing cord/AR. Perhaps that is also one of the reasons the plane is under 8??
Walter
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Old Dec 01, 2005, 06:14 PM
drCarter
Princeton. TX.
Joined Nov 2005
242 Posts
Quote:
Originally Posted by oakman7004
Weight is only one aspect. It also got to stand those competition launches you need sometimes. Here is my pick of a light DLG glider.

Mattias Hammarskiold HUMBUG 2 has an AUW of 220g=7,75 Oz

and it stands + 200ft launches...several European top pilots have testes to break this lady on launch, but she is still alive and kicking. More info on this thread #69:
http://www.rcgroups.com/forums/showp...1&postcount=69

cheers Jonas Ekman

I think that plane has a fixed vertical. No rudder or rudder servo.

Dwain
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Old Dec 01, 2005, 06:17 PM
drCarter
Princeton. TX.
Joined Nov 2005
242 Posts
Look at the rudder in the above post. I am about to do the same in a plane I am now building, should be interesting.

Dwain
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Old Dec 01, 2005, 07:26 PM
Team WC2013 F3K
oakman7004's Avatar
Sweden
Joined Dec 2004
984 Posts
Quote:
Originally Posted by drCarter
Look at the rudder in the above post. I am about to do the same in a plane I am now building, should be interesting.

Dwain
Hi,

You guys don't miss anything!

Yes there is no rudder since Mattias truly goes for highest launch possible and feels that a rudder on the fin "softens" the tail to much. He has also tried using BIG fins (I think I've seen +38 sq in) to minimise the yaw

The plane beside the Humbug 2 is Mattias Fireworks3, also without rudder. He has flown like this the last 3 years I think, carrying that drawback in thermalturns, not be able..aaa you know, still performing very well in comp.

And as you already figured it out the HUMBUG 2 has a very high aspect ratio wing compared to "normal" DLG ships, The reason is the same as for not using a rudder. Is a high aspect ratio wing launching higher that a "normal", they needed to test that? If we speak about wing loading I think they ended up as a 9-9,5 Oz SG!

Cheers Jonas Ekman
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Old Dec 02, 2005, 12:58 AM
Registered User
Sweden
Joined Sep 2005
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Quote:
Originally Posted by oakman7004
Hi,


Is a high aspect ratio wing launching higher that a "normal", they needed to test that?
Cheers Jonas Ekman
The purpose of this Humbug2 concept was to find out if the weight is critical for launch height. To reduce the weight and keep the stiffnes the total area needed to be reduced so the aspect ratio was enlarged.
We have seen that this smaller lighter glider launches approx 10% higher than our normal DLG's of 310g.
New tests will come.

Regards
Mattias Hammarskiöld
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