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Author Topic: Biplane Racers - Reno Style  (Read 5690 times)
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dputt7
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« Reply #25 on: August 19, 2013, 09:30:56 AM »

Well Ive stuck on a few more bits, Miss Gianna uses a Cessna type spring undercart so I formed the U/C from wire and then covered it with sheet balsa and sanded it to shape, with the grain cross wise the wire is still able to flex.  Finished off the stringers on the underside. Thats it for now, I'm quite pleased with the shape  Grin
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sparkle
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« Reply #26 on: August 19, 2013, 03:24:50 PM »

 Grin Interesting looking plane. Neat undercarrige.  Cool
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dputt7
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« Reply #27 on: August 20, 2013, 09:17:33 AM »

Fiddely bits tonight, wheels and spats. The wheels seem too small and the spats seem too big but it agrees with the photos  Grin 
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rgroener
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« Reply #28 on: August 21, 2013, 01:41:24 AM »

Very nice bones. Looks really sharp!
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RolandD6
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« Reply #29 on: August 21, 2013, 03:25:54 AM »

I like the way you have done the UC Dave.

Do you simply dope and paint the wood or do you use some other way of finishing it that is flexible and crack resistant?

Paul
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THB
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« Reply #30 on: August 21, 2013, 09:17:23 AM »

A million stringers on this little fuselage. Would have been lighter if I carved it out of block! Anyway - I thought I'd have a go at cutting most of the stringer slots 'in situ'. Starting them off at one end and marking up the positions downwind. Tried a Dremel. Potential disaster. So I went back to cutting with a blade.

I'm looking forward to making some wings - but note that Dave is already putting wheels on. Mine doesn't even have u/c legs yet...
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Tim
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dputt7
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« Reply #31 on: August 21, 2013, 09:28:56 AM »

Hi
Thanks Roman for your kind comments, Paul, the balsa flexes over the whole length of the leg so there is not much movement in one place, it will be doped and painted with enamel so the finish should be flexible enough.
I've built the tail unit tonight, I always struggle with wether to make it with adjustable control surfaces or not so this time I've struck a compromise.
The rudder will be adjustable and the tailplane will be adjusted with a shim.
Dave
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sparkle
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« Reply #32 on: August 21, 2013, 04:22:45 PM »

 Grin It's always interesting to watch you boys "battle" it out!  Grin
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OZPAF
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« Reply #33 on: August 21, 2013, 06:27:29 PM »

Nice work fellows. Those stringers look like an entertaining exercise Tim and even your building frame looks neat.
Interesting UC Dave - is it laminated?
John
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THB
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« Reply #34 on: August 22, 2013, 09:24:51 PM »

Only small progress. Added the nose block former and hollowed out. fitted a noseblock set up for about 1-2 degrees left and 3-4 down thrust. Used Dremel to spin up a spinner. Haven't decided on prop yet - I think I'll see how the weight distribution turns out and see if it need a heavier prop or not.

I think I put the lower stringers on before I cemented the u/c legs in place...  Hmmmm
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Tim
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hoogie007
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« Reply #35 on: August 23, 2013, 03:12:55 PM »

parchment paper works best-
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dputt7
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« Reply #36 on: August 23, 2013, 10:55:56 PM »

Hi
Looking good Tim, don't you just love these "design as you go" models, there is always a surprise  Shocked
I've built some wings, not sure now this was the right choice of model  Grin it certainly won't be a soarer but it will be FAST It looks like the wings are for a different scale, Oh well. nothing special here, can't belive I only used a single spar and so few ribs, must be getting lazy.
Dave
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sparkle
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« Reply #37 on: August 23, 2013, 11:09:57 PM »

 Grin You gotta love the design as you go models Cheesy Is there another type?  Wink What do you call those!  Roll Eyes
   A racer that's fast... sounds like a good plan!!  Grin
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dputt7
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« Reply #38 on: August 24, 2013, 12:34:53 AM »

John I wonder if we drew plans after we worked out the details and built the model whether any one would build them. I would just as soon build another model than go to all that work, though I do admire those that do
I've got enough built now for a mock up, will have to start covering soon so I can mount the flying surfaces and work out the interplane struts.
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sparkle
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« Reply #39 on: August 24, 2013, 03:21:07 AM »

 Grin Wow! Speedy progress. I'm glad you are the one that is trimming this one!  Wink I really want to build from someone else's plans, but somehow it always gets mucked up!
     You are getting to the exciting part- finishing and making it fly!
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Marco
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« Reply #40 on: August 25, 2013, 06:36:14 AM »

I am depressed : I am struggling to finish my G55, building it as per the plan, and in few days you are putting together some wonderful models starting from three-views and a couple of pictures ! My most sincere congratulations !
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OZPAF
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« Reply #41 on: August 25, 2013, 09:13:15 PM »

That looks very impressive Dave. I don't think the original 3 views did it justice - it looks better all framed up.
How are you going Tim on yours?
John
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orbiteer127
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« Reply #42 on: August 26, 2013, 12:07:10 AM »

Hey Marco,
Don't worry, It has taken me all most of full year to build my DeHaviland Dash 8 and I followed a couple of guys that put theirs together in less then two months. Just keep moving forward. I have found that if I can do a tiny, and I mean tiny bit of work on my plane in my spare time I'm good with that. When I say tiny, I mean tiny, things like setting out the laser cut sheet of wood and replace the blade on my e-xacto blade, so the next day I'll can spend another tiny bit of time cutting out some parts. Then the next day sanding those parts etc.


William
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THB
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« Reply #43 on: August 27, 2013, 07:26:59 AM »

Welcome Marco, William - if you enjoy building, then this is a very satisfying hobby. It doesn't matter how quick. I have many airframes that will take a long time to finish - and it is good to find the time to enjoy the progress.

Making a deadline is just a trick to get you building quicker - and it gives you something new to fly at the next meeting. Our group used to have a new theme every month - and it was often hard to get a model finished. But then I had 12 new models every year!  Grin Grin

It doesn't matter how long you spend building them - some of them won't fly anyway...

A busy few days so not much building, but I hope to do much more tonight...  here is some progress.

Dave will have to start another project while I catch up...
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Tim
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« Reply #44 on: August 27, 2013, 07:29:51 AM »

Hi John (OZPAF) - Hope you liked the pic of the quarter grain in the last post. I've been saving it for a project like this!
Tim
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Tim
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sparkle
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« Reply #45 on: August 27, 2013, 08:04:27 AM »

 Grin Nice 1/4 grain! Grin
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dputt7
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« Reply #46 on: August 27, 2013, 09:35:54 AM »

Hi
I have to agree with Tim, the main object is to enjoy what you are doing, it dosent matter how long it takes. My problem is if I take too long on a build I am often distracted by another project. I once built a JU88 for elect. that had a 2 year gap in the building time but I did eventually finish it.
    Good progress Tim, see you finally got to build some wings, and yes John, the balsa u/c fairings are laminated.
Well I've got around to covering so I can do some alignment checks before assembly, just covered with Modelspan and 2 coats of 50/50 dope and thinners on the flying surfaces and a bit more on the tissue covered sheeted nose. Made up a male and female mould for the canopy. I did a rough CofG check and put in a more rearward peg position, I nearly cut out the front one but decided it wont hurt just incase its does turn out a bit tail heavy. Still would have liked to see abit more wing area though  Roll Eyes
regards Dave
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sparkle
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« Reply #47 on: August 27, 2013, 03:22:14 PM »

 Grin Wow nearly done!  Cool Racers equal small wings I guess!
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OZPAF
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« Reply #48 on: August 27, 2013, 07:46:08 PM »

Hi John (OZPAF) - Hope you liked the pic of the quarter grain in the last post. I've been saving it for a project like this!
Tim

Its obviously a well matured piece of quarter grain Tim Grin Just the stuff for ribs.
John
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OZPAF
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« Reply #49 on: August 27, 2013, 07:54:19 PM »

It looks really clean for a small biplane Dave - it should be fun to fly and quite fast. Perhaps you nad Tim could set up a straight  line speed trap over a short distance with cushions or similar at the far end to catch them.
anyway have fun.
John
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