PDA

View Full Version : Scratch build Bristol Scout D 1/9


lz23
07-03-2007, 02:20 PM
Some time ago I start new project using J.C. Wilkerson drawing of Bristol Scout Type D.
Wingspan is 32"
I'll try to keep weight under 16oz if I can.

Here is almost finished plane
http://img440.imageshack.us/img440/8852/perka4fg5.jpg

Also some of decals are already in place
http://img440.imageshack.us/img440/8825/decali1aw1.jpg


Here is the pilot in the cockpit
http://img443.imageshack.us/img443/7756/pilot3nz7.jpg

One more shot
http://img443.imageshack.us/img443/7647/pilot4dh2.jpg

The build thread is here:
http://www.rcgroups.com/forums/showthread.php?t=693544

Saucerguy2
07-03-2007, 08:50 PM
Welcome to Watt Flyer!

That's a very nice plane, I love the attention to detail, glad your two and a half year build is finally coming to completion, now the dilema, are you going to risk taking it up in the air?

Post the build photo's here, I'm sure we'd all love to see them.

lz23
07-03-2007, 09:20 PM
Actually it was more like 4 moths, just now take a look on pics, and someone at home was playing with the date on the camera. I start this plane in beginning of march 2007. Hope to maiden her soon.

firemanbill
07-03-2007, 10:04 PM
Beautiful aircraft!

I need to see more! Get some of it where we can see the whole plane at once.

very very nice!:ws:

lz23
07-03-2007, 10:07 PM
I'm going to take more pictures on the field soon. I hope that she will fly well.

Here is the build:

First thing is to get all details printed on the wood. I'll use laser jet printouts and iron to get the job done
http://img469.imageshack.us/img469/1580/kroikapi3.jpg

Using iron on high and here it is:
http://img99.imageshack.us/img99/2197/tr5ao5.jpg

http://img99.imageshack.us/img99/4752/tr6vu8.jpg

After that the sides of the fuse come together:
http://img486.imageshack.us/img486/1573/tl1zg8.jpg

Geting them together was easy using simple jig made from plywood. Tower sells it but i did'nt want to wait for delivery, so just cut mine
http://img486.imageshack.us/img486/4100/tl2pu6.jpg

At this point I decide to give a try to brushless motor for this model, but I allready had EPS-350, so there will be two options for power plant:
http://img486.imageshack.us/img486/3124/tl5yq4.jpg

Control weight chek at this point - 26 gr (0.92 oz)
http://img405.imageshack.us/img405/5076/tl10oi7.jpg

lz23
07-03-2007, 10:10 PM
The tail surfaces was made by laminating 3 layers of 1/32x3/16 balsa soaked in hot water and glued with Elmer's white glue. Templates are foam board.
http://img405.imageshack.us/img405/9731/stb1st9.jpg

Stab came out at 6 gr (0.21 oz)
http://img89.imageshack.us/img89/6563/stb3ip9.jpg

Fin surprised me with weight of... 0 gr (o oz). This is indication that real weight is less than scale can sense obviously. Precision of my scale is 1gr (0.036 oz) so fin must be little less than that.
http://img89.imageshack.us/img89/769/stb4yx2.jpg

The wings was very straightforward build.
Top one come at 16 gr (0.57 oz)
http://img204.imageshack.us/img204/2956/kr2xn8.jpg

And bottom one at 26gr. (0.92 oz)
http://img20.imageshack.us/img20/5870/kr4oa9.jpg

Little work on landing gear:
http://img204.imageshack.us/img204/8464/kol1zw8.jpg

Now I get on instrumental panel. All that can find on this airplane was that:
http://img408.imageshack.us/img408/7559/kab0pe0.jpg

So trying to achieve something close to original my panel get this shape:
http://img402.imageshack.us/img402/4516/kab1wb2.jpg

Not great, but not that bad, considering that this is actualy my first scale project.
It was kind of difficult task since all is so small. At least for my eyes.
http://img402.imageshack.us/img402/9156/kab3sp4.jpg

Weight of all this decoration come out at 18 gr. (0.64 oz)
http://img402.imageshack.us/img402/8922/kab2bg8.jpg

lz23
07-03-2007, 10:12 PM
Colors will be like on this airplane:
http://img213.imageshack.us/img213/8899/scoutoriginal1ms3.jpg

At least this is my target. How it will turn out, we'll see.

Aileron's mechanics is ready. For this model I decide to use unusual way of engaging ailerons. Since there is no sense to have control horns sticking out of the wing, and there is no way to use torque rods, I setup next linkages:
http://img215.imageshack.us/img215/6959/kr5if5.jpg

http://img504.imageshack.us/img504/8175/el1pl7.jpg

Control weight chek shows total with S-75 servo of 42gr (1.5 oz)
http://img501.imageshack.us/img501/5442/kr9yw4.jpg

If some one is curious about hidden torque rods or whatever they are, here is few shots. This position is neutral
http://img464.imageshack.us/img464/6638/el2ap5.jpg

This is aileron up
http://img464.imageshack.us/img464/8825/el3po5.jpg

This is down
http://img464.imageshack.us/img464/7247/el4fb9.jpg

Now is time to join instrumental panel to the fuse.
http://img174.imageshack.us/img174/1909/tl11jg8.jpg

One more shot
http://img174.imageshack.us/img174/994/tl12qs8.jpg

And again weight control - 56 gr (2.07 oz) Keep gaining weight...
http://img174.imageshack.us/img174/6522/tl13qg3.jpg


Covering will be doculam 1.5mil painted over the adhesive side.
http://img216.imageshack.us/img216/7225/cover1gy3.jpg

One more
http://img383.imageshack.us/img383/3364/cover2ha5.jpg

Here is the linkages for the tail.
They are 0.047" from servos, then continue as pull-pull.
http://img61.imageshack.us/img61/2779/kontrol1pq9.jpg

http://img61.imageshack.us/img61/7537/kontrol2le0.jpg

After that is fuse covering
http://img230.imageshack.us/img230/3152/tl14jj1.jpg

http://img211.imageshack.us/img211/5416/tl15xu5.jpg

Weight at this point is 72 gr (2.57 oz)
http://img235.imageshack.us/img235/4400/tl16at2.jpg

So after attaching stab and all linkages I get this
http://img142.imageshack.us/img142/4079/kontrol3kc0.jpg

Yellow tubes running on top sides of the fuse work in two ways - they are representing the original metal frame of the original airplane and also they carry linkages from servos
http://img91.imageshack.us/img91/9494/kontrol4sh0.jpg

Can't resist and take this one
http://img82.imageshack.us/img82/1969/kontrol7lb9.jpg

lz23
07-03-2007, 10:15 PM
Time for dummy engine. Initially i decide to go with complete scratch build, but then change my mind and ordered dummy from Dare design. Here's what I get in the mail
http://img230.imageshack.us/img230/2063/motor1og8.jpg

Little paint work and result is acceptable
http://img484.imageshack.us/img484/5909/motor2bl2.jpg

Not heavy - 4gr (0.14 oz)
http://img458.imageshack.us/img458/476/motor3asr5.jpg

And small.
http://img458.imageshack.us/img458/3949/motor4oj2.jpg

Then was the problem how to attach it. Since I have adjustable motor angle, dummy have to stay centered with electric motor all the time. So this was route I take.
http://img379.imageshack.us/img379/7421/motor5pl5.jpg

It is attached with small screws so in case of need to moved to another motor or for motor replacement to be easy accessible.
http://img379.imageshack.us/img379/4562/motor6od2.jpg

http://img379.imageshack.us/img379/9229/motor7ra1.jpg

Cowl is made from few layers 1/8 and 1/4 balsa with 1/32 wrapped around
http://img58.imageshack.us/img58/5956/kapot0ht7.jpg

Little sanding and little paint and result is
http://img266.imageshack.us/img266/571/kapot3wd1.jpg

One more shot
http://img266.imageshack.us/img266/1886/kapot2ti2.jpg

I decide to go with 4 neodymium magnets, since they are strong enough to hold the entire airplane hanging from the cowl without problems
http://img266.imageshack.us/img266/6292/kapot4tt8.jpg

And here is a shot of the wheels. I wrapped thin plastic and painted. They turn out not bad, not very scale tough...
http://img58.imageshack.us/img58/6232/kol5go0.jpg

Battery hatch was easy - 1/16 balsa with 1/8x1/8 enforcements
http://img143.imageshack.us/img143/5176/batkap1hs4.jpg

And again neodymium magnet did the trick of holding it in place
http://img143.imageshack.us/img143/2786/batkap2od2.jpg

The wings are covered. Here is top wing
http://img112.imageshack.us/img112/4575/kr10yy3.jpg

http://img124.imageshack.us/img124/261/kr11ak6.jpg

And bottom wing
http://img124.imageshack.us/img124/3967/kr12eq6.jpg

http://img252.imageshack.us/img252/3268/kr13ug1.jpg

Weight is: top wing - 34gr (1.21 oz), bottom wing - 54gr (1.92 oz)

Bottom wing is glued in place
http://img167.imageshack.us/img167/8283/all1pp5.jpg

Pilot seat is ready
http://img371.imageshack.us/img371/3577/sedalkaig7.jpg

Here is the machine gun.
http://img162.imageshack.us/img162/3758/kartech1jz5.jpg

My camera didn't catch all details, but there is more on the gun that picture shows. It's all scratch build. Weight is 4 gr. (0.14 oz)
http://img162.imageshack.us/img162/3566/kartech2sl2.jpg

I have little progress. Finished and installed wind shield, installed machine gun.
http://img242.imageshack.us/img242/2164/kartech3mi8.jpg

One more shot
http://img242.imageshack.us/img242/4977/kartech4mk2.jpg

Wings are in place, rigging is also done.
http://img73.imageshack.us/img73/6787/sglob1wi3.jpg

Few more shots
http://img73.imageshack.us/img73/2572/sglob2hb5.jpg

http://img73.imageshack.us/img73/4862/sglob3sn0.jpg

http://img73.imageshack.us/img73/7939/sglob4ih4.jpg

http://img73.imageshack.us/img73/6314/sglob5jj0.jpg

http://img73.imageshack.us/img73/3891/sglob6yj1.jpg

Weight at this moment is 326 gr (11.64 oz) I have to add to this 47gr (1.67 oz) battery and some more details. Hope to keep AUW below 400 gr (14.28 oz.

lz23
07-03-2007, 10:17 PM
Here is my attempt to make the prop look little bit better.
I scan the prop, trace it an draw over the lines that separate different wood layers
http://img440.imageshack.us/img440/6904/perka1pb7.jpg

Then stretch two layers of masking tape on top of each other, take the prints of the outlines and with X-acto carefully cut the pattern on both layers at the same time. Then place it on the prop.
http://img440.imageshack.us/img440/6817/perka2td8.jpg

After that spray paint the prop, and when the paint was semidry I use dry brush to simulate wood pattern. Not very good result, but better than plain orange prop I think
http://img440.imageshack.us/img440/4204/perka3da0.jpg

Here is on the plane
http://img440.imageshack.us/img440/8852/perka4fg5.jpg

Also some of decals are already in place
http://img440.imageshack.us/img440/8825/decali1aw1.jpg

Here is a pilot. Started it from plastic head and few pieces of pink foam.
http://img443.imageshack.us/img443/4756/pilot1am4.jpg

After little work get this shape:
http://img443.imageshack.us/img443/7559/pilot2ru4.jpg

Here is in the cockpit
http://img443.imageshack.us/img443/7756/pilot3nz7.jpg

One more shot
http://img443.imageshack.us/img443/7647/pilot4dh2.jpg

Now little closer look
http://img443.imageshack.us/img443/9231/pilot5oe6.jpg

One more
http://img443.imageshack.us/img443/7956/pilot6zv0.jpg


And AUW is 430 gr (15.35 oz) including 2x860mA LiPo battery
http://img443.imageshack.us/img443/5708/teglo2uc4.jpg

lz23
08-20-2007, 02:12 PM
Here is the maiden
http://www.youtube.com/watch?v=Mdurb7SeXpg