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Old Oct 01, 2011, 10:03 AM
Sundancer is offline
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I like real wooden aeroplanes!
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Build Log
FROG build-off Oct 2011 - April 2012; ZEPHYR

Well, it is October 1st here in France, and since this idea was partly mine, I feel obliged to get things rolling, so I dug out the Zephyr plan:



Years ago I had drawn in rudder and elevator surfaces, but then decided that my current radio gear and then electric technology was too heavy for this diminutive 33" model. No problem with that now, so the first job was to check which parts were not shown on the plan. No problem with wing and tail ribs - only the centre tail rib is shown, but as the spar is straight it is easy to develop the others - and the wing ribs are constant chord apart from the last one which is easily sketched in. The fuselage formers are missing though, so I "lofted" these from the side and top views plus the perspective sketches. (Note how, typical of Frog plans, there are lots of "scrap" perspective sketches. It is one of the features that makes many Frog plans so attractive):



I am planning minimum structural mods on this build. Control surfaces, obviously, and the changes to the nose to accomodate an electric motor and battery stowage. My usual riblets in the wing LE, a bit of extra sheeting let in at the fuselage front, and a plug-in two leg wire undercarriage instead of a sewn-in single leg, and that's about it.

I also want to get the frame built as quickly as possible, as the installation and finishing always seems to take forever, so this weekend is a "buildathon" which, come Monday, will hopefully see a completed basic structure - well, that's the plan!

My original Frog 50 powered FF Zephyr over 50 years ago weighed in at just over 6 ounces, which is the design weight on the plan. With radio, I am hoping this one is going to be no more than 10 ounces, 8 would be better, but one has to be realistic.

I'll hopefully be back with an airframe in a couple of days!
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Last edited by Sundancer; Oct 04, 2011 at 03:20 PM.
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Old Oct 01, 2011, 12:32 PM
sparks59 is offline
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Watching closely!
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Old Oct 02, 2011, 04:25 AM
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Very pretty little model Sundancer, looking forward to your build!
What's the span?

Jon
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Old Oct 02, 2011, 04:48 AM
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Quote:
Originally Posted by Yak 52 View Post
Very pretty little model Sundancer, looking forward to your build!
What's the span?

Jon
33" according to the post!
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Old Oct 02, 2011, 06:26 AM
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Ah yes! Thanks!
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Old Oct 02, 2011, 08:53 AM
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I need to finish the dawg so I can start the tomtitx2.8,the plan is still for a 50.4" span version but if I get the same math from the gal at staples I did last time who knows what size it might end up.
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Old Oct 02, 2011, 08:56 AM
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I like real wooden aeroplanes!
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Could be pretty awesome, Rabidrue! If she does the same as with the Dawg, this being a biplane, you'll need to corner the world balsa stocks! I'll leave the entry in Post 1 as "2.8x" until you let us know how the Staples visit went
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Old Oct 02, 2011, 09:06 AM
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If she does it again the covering on it will be patch work city,after the dawg my covering budget is shot for the next 2 years!
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Old Oct 03, 2011, 03:49 PM
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I like real wooden aeroplanes!
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Well, it has been a busy weekend, but I now have the bare bones of the Zephyr.

I decided to retain the motor mount beams as they provide a great deal of the structural integrity in the nose area and my selected motor is mounted into a carbon fibre tube and it will be easy to fit between the bearers to retain the original thrustline. I am not expecting this model to be nose heavy, so the extra timber up front is not an issue.

Everything is pretty much as per plan except for the leading edge and riblets and the elevator.

That's the easy bit done, now I have to work out the battery installation etc., to which end the front two sheeting panels in the fuselage nose are only slotted in, not yet glued, whilst I sort it all out.



Hopefully another week of work should see it ready for covering.
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Old Oct 03, 2011, 04:11 PM
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Hells teeth that was a quick build. I thought you were giving us 7 months, not 7 days!

I'd better make some decisions quick to at least get started.....

Ian
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Old Oct 03, 2011, 09:29 PM
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"Well, it has been a busy weekend.."

You are not kidding, George. The skeleton is all but finished! And looking really great too
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Old Oct 03, 2011, 11:22 PM
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Cripes George! It's alright for you retired types isn't it?
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Old Oct 04, 2011, 12:36 AM
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Quote:
Originally Posted by kkphantom View Post
Cripes George! It's alright for you retired types isn't it?
Agreed Gary, retirement is great (getting old sucks though!!) but it was a weekend, so no excuses for you working types!! I also managed a couple of flying sessions (weather is great at present), a shopping trip and a bit of hedge cutting, it's all a question of time management It'll slow down now though, the fiddly bits always take longer.

The bits as shown weigh 2.7/8 ounces (82 grams)

Ian: don't worry, you have got 7 months, it's just that I have a couple of other FROGS in mind as well, so need to get cracking.....
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Last edited by Sundancer; Oct 04, 2011 at 02:17 AM. Reason: Correction and additional text
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Old Oct 04, 2011, 04:28 AM
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Ok George, it was a weekend, and you did get some other jobs done. But some of us out here have to do all the 'little' things that accumulate through the week at the weekend

Me, I'm just jealous!

sparks
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Old Oct 04, 2011, 04:44 AM
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Yeah, OK Sparks I remember those days! Until five years ago a typical weekday for me was; wake up about 5:30, spend an hour in the workshop (amazing what you can do in an hour when your brain is fresh), then off to the club for a swim (1000 metres normally) and some steam, into work by 8:30, eat breakfast at the desk, 1 p.m., an hours building on the small model I always had going at work whilst eating a sandwich, leave at 6 p.m. and battle the traffic for an hour, dinner, an hour or so for household tasks and a final hour in the workshop before collapsing into bed about 11. Weekends were for FLYING any time the weather co-operated (which was not often in N-W England) and DIY household tasks when it didn't. It was amazing how much headway you could make on two different models in about 15 hours a week of planned building.

I was one of the lucky generation who was never made redundant, unlike at present, so after 47 years of non-stop working I reckon I am due a bit of "free format" modelling time! Needless to say, the above schedule would probably kill me now!!

Looking forward to that Centurion, doesn't matter if it takes all the seven months as long as you enjoy it.
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Last edited by Sundancer; Oct 04, 2011 at 04:45 AM. Reason: addition
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