Chilton DW1

AllanK1 · Jul 14, 2009, 08:39 PM

Hi all, it's time for me to go bash some balsa, it's very wintery down here in New Zealand. Frosty mornings and snow down to 1000 feet so my building den is a great place to hibinate.
I need a model suitable for our 1/2A Texaco scale class. If I could find a plan that is pre Jan 1 1950 then it would qualify for normal 1/2A Tex too. I figured if I szed to a little over 300 square inches then it could also adapt to our new Electric Tex draft rules. 3 in 1 has to be good.
So what to build.... well a while back I went looking and freinds sent me a bunch of Aeromodeller 1940's scale power plans. Of these the Chipmonk and the Chilton looked great. I have a real softspot for prewar racers so it had to be the Chilton. I went looking on the Web and found a wonderful site about the four DW1s the company built. Very inspiring. http://www.chilton-aircraft.co.uk/newlybuilt.html .
I set to with the photo copier and now have plans at 46.75 inch span and 304 sq inches of wing. I need to build it down to 17 ozs to hit the minimum wing loading. Could be challenging but I estimate it is where I need to be to do 8 minutes with the regulation Cox BabeBee up front.
Progress photos soon.

Allan

AllanK1 · Jul 14, 2009, 11:12 PM

The Aeromodeller plan is the basis for my Chilton. The is actually a link to Aeromodeller article on the Chilton site .

AllanK1 · Jul 15, 2009, 01:09 AM

The aeromodeller plan and article are on the Chilon site too....Nice.

David Hipperson · Jul 15, 2009, 03:53 AM

David Boddington did a Dart Kitten for Texaco at a span of 45.5in span and a weight of 19oz for Texaco back in RCSQ in 1993 so your figures look pretty good as Dave Larkin (the builder?) thought he could do the Dart Kitten at about 17oz.

Warren B · Jul 15, 2009, 04:33 AM

Not a vintage design, and certainly a bit over the 17 oz, but maybe still of interest.
Here's my DW 1 built aboiut 20 years ago and still flying now.
From the Dennis Tapsfield plan it's half way between 1/4 and 1/3 scale at 84".
Rather simplified and some of the turtledeck shapes are wrong, but flies beautifully on an old pre-surpass OS 120.
Needed a 1 kg of lead in the nose to balance (those full length ply doublers!) but still just squeezed under the 7 kg limit.

Despite the weight, glides really well as proven on the occasion my throttle servo arm fell off - took ages to run out the tank at full throttle- followed by a LONG glide back home safely (even needed the flaps to slow down for the landing).

At least it's not buffeted about in a breeze!

Work in Progress · Jul 15, 2009, 05:00 AM

Good project. The old Ford engine may be a bit of a lump but as a flying machine the DW1 always had a superb reputation for overall handling and the performance it achieved from that limited power unit. I'd love to try one with a Walter Mikron III in it, though as with a lot of pre-war light aeroplanes I doubt I would fit in the cockpit.

Snorks · Jul 15, 2009, 11:26 AM

Im an idiot with my new scanner but 'flying scale models' march 2009 'kent on construction' page 52-55 has an article on it.
cheers
simon

AllanK1 · Jul 15, 2009, 06:21 PM

Lovely model Warren and it is nice to know the design handles and glides well.
Good news on the build weight too Snorks. My building seems to be getting rougher and heavier as I get older (a bit like me!) but I'm hopefull of making the 17 ozs. The parts built to date weigh really light but it is early days.

Does anyone have a recommendation for light 2.5 inch commercial wheels?
I can always make some I guess but I would like a soft tire.

Attached is the last weeks worth of progress. I've departed just a little on the structure. I have to maintain all outlines, areas. moments and angles and surface sections.

Thanks for the interest.

Allan

AllanK1 · Jul 15, 2009, 06:22 PM

Quote:

Originally Posted by Snorks

Im an idiot with my new scanner but 'flying scale models' march 2009 'kent on construction' page 52-55 has an article on it.
cheers
simon

I would love a copy Simon if you can get it to scan.

Allan

planeman · Jul 15, 2009, 08:54 PM

I have two nice plans for the Chilton DW-1 in digitized .PDF form I can send you. Just e-mail me at rcarswellsr@att.net and be sure to mention "Chilton DW-1 plans" and I will e-mail them back. No charge. Nice project.

Planeman

AllanK1 · Jul 21, 2009, 07:15 PM

Time for an up date. Its been a busy week but I have carried on with the tail end on the odd evening. The Tailplane is secured with two tiny nylon screws as I want to be able to adjust the incidence if needed. The fin and rudder peg in at the front and are screwed down by another nylon screw up from the bottom. I tap threads in little bits of circuit board and glue them in as fixed nuts.
The rear deck came out OK I guess. All just held in place then CAed. I lost count of how many times I glued myself to the model!
The fairing for the fin is solid block shaped up the relieved to clear the T/P then 3/16 is sliced out of the middle for the fin. Work out OK.
Next I need to work forwards, foward deck will be removeable to get at the gear without taking the wing off. In fact I think the wing center section will be glued to the fuse like the original. This will be stronger than having it removeable. The tips will plug in.
Thanks for the interst.
Allan

AllanK1 · Jul 21, 2009, 07:16 PM

Quote:

Originally Posted by planeman

I have two nice plans for the Chilton DW-1 in digitized .PDF form I can send you. Just e-mail me at rcarswellsr@att.net and be sure to mention "Chilton DW-1 plans" and I will e-mail them back. No charge. Nice project.

Planeman

Would love to see those plans Planemen. Did you get my email?

Thanks again

Allan

planeman · Jul 22, 2009, 09:28 AM

No I haven't Alan. Please send again.

Planeman

JimPatrick · Jul 25, 2009, 07:23 PM

This is the a model, DW1a
1/4 scale
Wingspan is 72 inches
Supertigre 91
also needed nose weight, too much ac grade ply in this model.
scratch plans by late friend Don Bennett

williame3590 · Jul 25, 2009, 08:27 PM

Wow..... very nice paint scheme and finishing

Bill

Jul 14, 2009, 08:39 PM	#1
AllanK1 Registered User Join Date: Dec 2007 Location: Blenheim, NZ Posts: 332	Chilton DW1 Hi all, it's time for me to go bash some balsa, it's very wintery down here in New Zealand. Frosty mornings and snow down to 1000 feet so my building den is a great place to hibinate. I need a model suitable for our 1/2A Texaco scale class. If I could find a plan that is pre Jan 1 1950 then it would qualify for normal 1/2A Tex too. I figured if I szed to a little over 300 square inches then it could also adapt to our new Electric Tex draft rules. 3 in 1 has to be good. So what to build.... well a while back I went looking and freinds sent me a bunch of Aeromodeller 1940's scale power plans. Of these the Chipmonk and the Chilton looked great. I have a real softspot for prewar racers so it had to be the Chilton. I went looking on the Web and found a wonderful site about the four DW1s the company built. Very inspiring. http://www.chilton-aircraft.co.uk/newlybuilt.html . I set to with the photo copier and now have plans at 46.75 inch span and 304 sq inches of wing. I need to build it down to 17 ozs to hit the minimum wing loading. Could be challenging but I estimate it is where I need to be to do 8 minutes with the regulation Cox BabeBee up front. Progress photos soon. Allan Attached Thumbnails great shot 31.7 KB · Views: 226 this is my favorit 55.9 KB · Views: 194 I will build this colour scheme I think 86.4 KB · Views: 186 How do you like the cast iron 93E (I think) Ford Ten engine. They were a truly aweful bit of engineering, I know, my first car was a Ford Ten and I rebuilt th engine twice, the second time properly! 75.2 KB · Views: 263

Jul 14, 2009, 11:12 PM	#2
AllanK1 Registered User Join Date: Dec 2007 Location: Blenheim, NZ Posts: 332	The Aeromodeller plan is the basis for my Chilton. The is actually a link to Aeromodeller article on the Chilton site . Attached Files Chilton DW 1 plan.pdf (1.29 MB, 279 views) This is the 1949 Aeromodeller plan refered to by Gossie and the basis for my build. The is also a David Boddington 40 and 60 inch free plan that is much later.

Jul 15, 2009, 01:09 AM	#3
AllanK1 Registered User Join Date: Dec 2007 Location: Blenheim, NZ Posts: 332	The aeromodeller plan and article are on the Chilon site too....Nice. Attached Thumbnails 177.5 KB · Views: 241 187.2 KB · Views: 185 128.9 KB · Views: 177

Jul 15, 2009, 04:33 AM	#5
Warren B Registered User Join Date: Dec 2008 Location: Mt Evelyn, Melbourne, OZ Posts: 69	Not a vintage design, and certainly a bit over the 17 oz, but maybe still of interest. Here's my DW 1 built aboiut 20 years ago and still flying now. From the Dennis Tapsfield plan it's half way between 1/4 and 1/3 scale at 84". Rather simplified and some of the turtledeck shapes are wrong, but flies beautifully on an old pre-surpass OS 120. Needed a 1 kg of lead in the nose to balance (those full length ply doublers!) but still just squeezed under the 7 kg limit. Despite the weight, glides really well as proven on the occasion my throttle servo arm fell off - took ages to run out the tank at full throttle- followed by a LONG glide back home safely (even needed the flaps to slow down for the landing). At least it's not buffeted about in a breeze! Attached Thumbnails 187.8 KB · Views: 170 177.9 KB · Views: 178 181.9 KB · Views: 221

Jul 15, 2009, 06:21 PM	#8
AllanK1 Registered User Join Date: Dec 2007 Location: Blenheim, NZ Posts: 332	Progress Lovely model Warren and it is nice to know the design handles and glides well. Good news on the build weight too Snorks. My building seems to be getting rougher and heavier as I get older (a bit like me!) but I'm hopefull of making the 17 ozs. The parts built to date weigh really light but it is early days. Does anyone have a recommendation for light 2.5 inch commercial wheels? I can always make some I guess but I would like a soft tire. Attached is the last weeks worth of progress. I've departed just a little on the structure. I have to maintain all outlines, areas. moments and angles and surface sections. Thanks for the interest. Allan Attached Thumbnails Frame needs top deck and engine B/H next 79.4 KB · Views: 149 Light rudder, laminated edge 88.5 KB · Views: 152 I like to laminate curved edges. Srips of 1/16 soaked in boiling water then bent around a ply former. Once dry I hit it with thin CA and lock it all up. 113.6 KB · Views: 154 The original needed more tail area and a thicker section to be effective. Looks too thick and I wish it was symetrical, still we will see how it goes.... 90.9 KB · Views: 161

Jul 15, 2009, 03:53 AM	#4
David Hipperson Registered User Join Date: Oct 2003 Location: Kilsyth, Victoria, Australia Posts: 1,266	David Boddington did a Dart Kitten for Texaco at a span of 45.5in span and a weight of 19oz for Texaco back in RCSQ in 1993 so your figures look pretty good as Dave Larkin (the builder?) thought he could do the Dart Kitten at about 17oz.

Jul 15, 2009, 05:00 AM	#6
Work in Progress Light and floaty does it Join Date: Sep 2004 Location: Cambridge, Great Britain (UK) Posts: 2,783	Good project. The old Ford engine may be a bit of a lump but as a flying machine the DW1 always had a superb reputation for overall handling and the performance it achieved from that limited power unit. I'd love to try one with a Walter Mikron III in it, though as with a lot of pre-war light aeroplanes I doubt I would fit in the cockpit.

Jul 15, 2009, 11:26 AM	#7
Snorks Registered User Join Date: Jan 2005 Location: Africa Posts: 772	Im an idiot with my new scanner but 'flying scale models' march 2009 'kent on construction' page 52-55 has an article on it. cheers simon

Jul 15, 2009, 08:54 PM	#10
planeman High Exalted Poohbah Join Date: Sep 2001 Location: Atlanta, GA USA Posts: 926	I have two nice plans for the Chilton DW-1 in digitized .PDF form I can send you. Just e-mail me at rcarswellsr@att.net and be sure to mention "Chilton DW-1 plans" and I will e-mail them back. No charge. Nice project. Planeman

Jul 21, 2009, 07:15 PM	#11
AllanK1 Registered User Join Date: Dec 2007 Location: Blenheim, NZ Posts: 332	Progress Time for an up date. Its been a busy week but I have carried on with the tail end on the odd evening. The Tailplane is secured with two tiny nylon screws as I want to be able to adjust the incidence if needed. The fin and rudder peg in at the front and are screwed down by another nylon screw up from the bottom. I tap threads in little bits of circuit board and glue them in as fixed nuts. The rear deck came out OK I guess. All just held in place then CAed. I lost count of how many times I glued myself to the model! The fairing for the fin is solid block shaped up the relieved to clear the T/P then 3/16 is sliced out of the middle for the fin. Work out OK. Next I need to work forwards, foward deck will be removeable to get at the gear without taking the wing off. In fact I think the wing center section will be glued to the fuse like the original. This will be stronger than having it removeable. The tips will plug in. Thanks for the interst. Allan Attached Thumbnails I have added a top stringer and 1/16 sq to support the lower edge of the deck skin. 132.8 KB · Views: 135 Skin was secured at the top then rolled down and CAed almost to the bottom. Skin was cut along the top of the longeron and CAed down. Fairing is shaped from solid 103.9 KB · Views: 142 Tailplane is now shaped up and screwed down. The elevators are still to be seperated and hinged. 118.7 KB · Views: 135 Tail fairing is glued to fin and secures the fin and rudder assembly with forward pins and screw rear. 98.7 KB · Views: 144

Jul 22, 2009, 09:28 AM	#13
planeman High Exalted Poohbah Join Date: Sep 2001 Location: Atlanta, GA USA Posts: 926	No I haven't Alan. Please send again. Planeman

Jul 25, 2009, 07:23 PM	#14
JimPatrick Los Gatos, CA Join Date: Aug 2008 Posts: 79	This is the a model, DW1a 1/4 scale Wingspan is 72 inches Supertigre 91 also needed nose weight, too much ac grade ply in this model. scratch plans by late friend Don Bennett Attached Thumbnails 102.8 KB · Views: 148 103.4 KB · Views: 133

Jul 25, 2009, 08:27 PM	#15
williame3590 Registered User Join Date: Aug 2007 Location: Caledonia,On. Canada Posts: 775	Colour Scheme Wow..... very nice paint scheme and finishing Bill

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