Dornier DO-X

Martin Hunter · Jan 22, 2005, 02:44 AM

Hi gang,

This has been on my "to do" list for a while and it looks like it will finally come to fruition this spring. I'm looking at making this beast at 1/39 scale giving a wingspan of 48" and a wing area of 460 sq in. My target weight with 6 IPS-dd's would be 17.5 oz giving 80 watts/lb and a 5.5 oz wing loading. Conversely, if I decide to go all out and use 12 IPS-dd's, my target weight will be 22 oz, giving 127 watts/lb and a 7 oz wing loading.

Anyway, I think I'll document here how I go from 3-view to flying model if anyone's interested. It should be an interesting project.

Martin

arrow5 · Jan 22, 2005, 04:45 AM

Good Luck Martin, Keep us posted please. I`d go a bit bigger and go for all 12 engines,maybe 6ft . The sound will be worth hearing. Anybody got memories of the big glo powered one from a while back ?

Tim Trick · Jan 22, 2005, 11:59 AM

Great project Martin!

I haven't heard of any 12 motor driven aircraft yet-I'm sure it would be a first.

Best of luck.

Cheers

Tim

theKM · Jan 22, 2005, 02:08 PM

While I don't think that 12 engine motors would be a first in this day and age, but it will certainly be a sexy plane. I've seen the four engined version Dornier, in a glow motor setup. Very nice in the air.

This photos shows that you need to thread it through a tunnel...

...a very regal looking bird.

TLyttle · Jan 22, 2005, 02:51 PM

A few yeas ago a freeflight electric Do X was published, I think it was Don Srull who built and flew it. It wasn't all that big and it used HiLine or MRC motors for power. No record of it being able to fly off the water...

Every year that goes by, the technology advances so that models like this are possible; how wonderful!

MikeL72 · Jan 22, 2005, 06:24 PM

Oh yes -- very interested and looking forward to following your progress.

arrow5 · Jan 24, 2005, 04:26 PM

Hi Martin , Have a look at attached jpeg lifted from the Skymasters club report on one of their fabulous float-fly events. Maybe you can track the builder via them on www.skymasters.org

Ironsides · Jan 25, 2005, 07:05 AM

arrow5:

Good catch. First time I noticed the sub-horizontal stab. I have never seen one before.

David

Pat Daily · Jan 25, 2005, 12:56 PM

Here is Don Srull's DO-X first built in 1989 as an electric free flight and now electric rc. Wingspan is about 42-48 inches or so. His plans were published in Model Aviation I think.

TLyttle · Jan 25, 2005, 03:24 PM

Man, ain't that gorgeous? No surprise that he converted it. Any word on whether it gets off the water or not? No motor torque problems there...

Petefoss · Jan 26, 2005, 12:01 PM

Quote:

Originally Posted by arrow5

Hi Martin , Have a look at attached jpeg lifted from the Skymasters club report on one of their fabulous float-fly events. Maybe you can track the builder via them on www.skymasters.org

Wow thanks for the plug for my club. The Dornier is Laddie Mikulasko's.

arrow5 · Jan 31, 2005, 04:21 AM

My pleasure Pete...I should have plugged our local Loch Insh Highland Splash-in too. It is the 21st annual one so hoping for big turn-out, 2nd week-end Sept. Shameless oppertunism !!!!

Martin Hunter · Jan 31, 2005, 10:30 AM

Here's one step towards the DO-X. Granted it's only eight motors but it's my first scratch build strictly from 3-views

Martin

MikeL72 · Jan 31, 2005, 10:45 AM

Your smile tells it all. Congratulations. Looks great in the air. How does it handle and sound with "only" eight going?
Mike

Martin Hunter · Jan 31, 2005, 10:46 AM

Thanks, Mike

Check out this thread for all the details including more pics and video:

http://www.rcgroups.com/forums/showthread.php?t=329330

Martin

Jan 22, 2005, 02:44 AM	#1
Martin Hunter Leave me alone! Join Date: Feb 2002 Location: Kamloops, BC, Canada Posts: 15,109	Dornier DO-X Hi gang, This has been on my "to do" list for a while and it looks like it will finally come to fruition this spring. I'm looking at making this beast at 1/39 scale giving a wingspan of 48" and a wing area of 460 sq in. My target weight with 6 IPS-dd's would be 17.5 oz giving 80 watts/lb and a 5.5 oz wing loading. Conversely, if I decide to go all out and use 12 IPS-dd's, my target weight will be 22 oz, giving 127 watts/lb and a 7 oz wing loading. Anyway, I think I'll document here how I go from 3-view to flying model if anyone's interested. It should be an interesting project. Martin Attached Thumbnails 25.6 KB · Views: 5115

Jan 24, 2005, 04:26 PM	#7
arrow5 can you land on that ? Join Date: Jan 2005 Location: Scottish Highlands Posts: 1,868	Hi Martin , Have a look at attached jpeg lifted from the Skymasters club report on one of their fabulous float-fly events. Maybe you can track the builder via them on www.skymasters.org Attached Thumbnails 27.2 KB · Views: 1460

Jan 25, 2005, 12:56 PM	#9
Pat Daily Registered User Join Date: Mar 2001 Location: Richmond/Wmbg Intl, Virginia, United States Posts: 3,706	Here is Don Srull's DO-X first built in 1989 as an electric free flight and now electric rc. Wingspan is about 42-48 inches or so. His plans were published in Model Aviation I think. Attached Thumbnails 14.6 KB · Views: 1533

Jan 31, 2005, 04:21 AM	#12
arrow5 can you land on that ? Join Date: Jan 2005 Location: Scottish Highlands Posts: 1,868	My pleasure Pete...I should have plugged our local Loch Insh Highland Splash-in too. It is the 21st annual one so hoping for big turn-out, 2nd week-end Sept. Shameless oppertunism !!!! Last edited by arrow5; Apr 26, 2005 at 03:39 AM.

Jan 31, 2005, 10:30 AM	#13
Martin Hunter Leave me alone! Join Date: Feb 2002 Location: Kamloops, BC, Canada Posts: 15,109	Here's one step towards the DO-X. Granted it's only eight motors but it's my first scratch build strictly from 3-views Martin Attached Thumbnails 88.5 KB · Views: 878 91.7 KB · Views: 962 46.6 KB · Views: 870

Jan 22, 2005, 04:45 AM	#2
arrow5 can you land on that ? Join Date: Jan 2005 Location: Scottish Highlands Posts: 1,868	Good Luck Martin, Keep us posted please. I`d go a bit bigger and go for all 12 engines,maybe 6ft . The sound will be worth hearing. Anybody got memories of the big glo powered one from a while back ?

Jan 22, 2005, 11:59 AM	#3
Tim Trick Registered User Join Date: Apr 2004 Location: The Netherlands Posts: 476	Great project Martin! I haven't heard of any 12 motor driven aircraft yet-I'm sure it would be a first. Best of luck. Cheers Tim

Jan 22, 2005, 02:08 PM	#4
theKM just groov'n... Join Date: Sep 2004 Location: central PA. Posts: 8,375	While I don't think that 12 engine motors would be a first in this day and age, but it will certainly be a sexy plane. I've seen the four engined version Dornier, in a glow motor setup. Very nice in the air. This photos shows that you need to thread it through a tunnel... ...a very regal looking bird.

Jan 22, 2005, 02:51 PM	#5
TLyttle Registered User Join Date: Mar 2004 Location: Keremeos, BC Canada Posts: 2,076	A few yeas ago a freeflight electric Do X was published, I think it was Don Srull who built and flew it. It wasn't all that big and it used HiLine or MRC motors for power. No record of it being able to fly off the water... Every year that goes by, the technology advances so that models like this are possible; how wonderful!

Jan 22, 2005, 06:24 PM	#6
MikeL72 Registered User Join Date: Feb 2002 Location: Whitehouse, NJ Posts: 278	Oh yes -- very interested and looking forward to following your progress.

Jan 25, 2005, 07:05 AM	#8
Ironsides Registered User Join Date: Jan 2003 Location: Toronto, Canada Posts: 1,282	arrow5: Good catch. First time I noticed the sub-horizontal stab. I have never seen one before. David

Jan 25, 2005, 03:24 PM	#10
TLyttle Registered User Join Date: Mar 2004 Location: Keremeos, BC Canada Posts: 2,076	Man, ain't that gorgeous? No surprise that he converted it. Any word on whether it gets off the water or not? No motor torque problems there...

Jan 31, 2005, 10:45 AM	#14
MikeL72 Registered User Join Date: Feb 2002 Location: Whitehouse, NJ Posts: 278	Your smile tells it all. Congratulations. Looks great in the air. How does it handle and sound with "only" eight going? Mike

Jan 31, 2005, 10:46 AM	#15
Martin Hunter Leave me alone! Join Date: Feb 2002 Location: Kamloops, BC, Canada Posts: 15,109	Thanks, Mike Check out this thread for all the details including more pics and video: http://www.rcgroups.com/forums/showthread.php?t=329330 Martin

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