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Old Jun 29, 2015, 07:25 AM
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Long Cabin 1935

I found the plans for this model while browsing through outerzone and I figured scaled down to 65" might suit my new PAW 2.49.

I have not much of an idea about the history of the original 78" Long Cabin design or if it performs well but it ticked the boxes for me purely on looks and fairly simple construction, and as I'm still pretty green on the whole building from plans exercise, this is an important consideration!

Made a start last weekend by redrawing the plan in 2D and scaling from 78" to 65" At this scale the nose mount area is exactly the right width for the 2.49.
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Old Jun 29, 2015, 07:30 AM
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Starting with the fuse
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Old Jun 29, 2015, 07:33 AM
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More work on the fuse
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Old Jun 29, 2015, 07:36 AM
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The 2.49 fits well. I'm fairly sure it will tow this reduced size version around ok.
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Old Jun 29, 2015, 07:40 AM
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Tail group made up and one wing panel off the board.
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Old Jun 29, 2015, 07:52 AM
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Sticks, Tissue & old Diesels
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Hi, I've never built one of these, but several guys here on the forum have built one, and you'll find at least one other Long Cabin thread (Bill's, from 2009).

They have a reputation of being great flyers. As you can see, the structure is light, but easily sufficient for easy, calm weather flying.

The only history I know (or think!) is that the "Long Cabin" name is more or less "by default".
When the model was originally published, it didn't have a name, but it's a cabin model, built by a gentleman whose name was "Long" (Fred Long, I think), so the publishers (perhaps Frank Zaic) called it the Long Cabin.

Anyway, it's a very nice plane.
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Old Jun 29, 2015, 10:48 AM
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This is what Model Builder had to say about it.

Ray
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Old Jun 29, 2015, 11:00 AM
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If you're looking for a gentle flying model or one that can climb and glide well with some thermal soaring then you signed up for the right model. And the power to size will be just right to suit this sort of behavior.

Your construction looks like you would not need to feel guilty by showcasing it behind some transparent or translucent covering either. Nice job!

With the size of rudder you've got do not use a lot of throw. You'll find that with the generous original dihedral that the rudder response is snappy and strong. You'll likely find that you don't need more than about plus and minus 3/4" of throw. At least that would be a good starting point.

If you elect to take out some of the dihedral don't make the wing TOO flat. Keep at least 1/2 of the original amount. And my own recommendation is to retain more like 2/3's. You'll want that much both to make sure you keep the crisp response to rudder inputs as well as keeping much of the original look of the OT design.
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Old Jun 29, 2015, 04:28 PM
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Thanks guys for the info. Certainly I'm looking for something with climb and glide performance, or just ticking around at minimal power, hence the RC version of the PAW diesel.
I'll be keeping the dihedral as per original with absolute minimum control surface throws. I'm not looking for a sport plane, rather something that will fly mostly unguided and just nudged in the right direction.

Covering will be SIG tissue and nitrate dope, its proven very durable on my other models so happy to go this way again.
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Old Jun 29, 2015, 05:43 PM
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It's an outstanding flyer. I powered mine with an OS 40fs with loads of power to spare.
When I covered mine I was just using up all my odds and ends of Supercoverite.

Bill
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Old Jun 29, 2015, 08:34 PM
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A wonderful pre war model. I've been navel gazing at the plan for years.

A guy in our club had a proper size one back in the '70s, and flew it F/F with from memory with a PAW 2.5 or perhaps a PAW 3.5???? It later on had an R/C rudder added to steer it about.
It had thousands of flight.
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Old Jul 09, 2015, 01:42 AM
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A little bit of progress, though not getting that much done at the moment - its a bit cold to be in the workshop for long during the evenings.
Anyway, I have managed to get the framework completed without any issues. The main wing has shaped up to be surprisingly strong even just as open frame and I'm sure once covered it will be a very stiff wing.

With 3 coats of 50/50 dope to all the wood parts I'm ready to start covering.

All up weight of all components including engine etc with just the coverings to go stands at 29oz. I had an original target of 34oz...it will be interesting to see how close it finishes up, looking like it won't need much additional nose weight at this point.
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Old Jul 09, 2015, 03:19 AM
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Very nice work.
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Old Jul 15, 2015, 06:46 AM
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Finished up covering and doping a few days ago, so today I assembled the final bits and pieces to finish off the Long Cabin.

Decided to use heavier weight coloured tissue from SIG for the first time. I had a heck of a time getting it to stick to my doped structure using nitrate thinners. Even though this technique has worked no problem with light weight tissue, I had to give up after 2 failed attempts with the coloured stuff. Somewhat out of desperation I tried using a glue stick (I'd seen done on youtube); this worked! Less messy too.

Model balances just about right without additional nose weight. I'll use the receiver battery to fine tune the CG without adding lead. Can't claim I'd planned and calculated it that way...purely a fluke.

Ready to fly weight finished up at 33oz, a little under my target and exactly 8oz/ft2.
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Last edited by MaXziim; Jul 15, 2015 at 06:48 AM. Reason: spelling
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Old Jul 15, 2015, 06:54 AM
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Very nice can't wait for the flight report.
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