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Jun 04, 2016, 06:31 PM
You made that out of trees?
Boomerang1's Avatar
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Discussion

50 + Build Off - Frog Zephyr


A friend has invited me to the Cowra Model Aircraft Club's Oily Hand Day, a celebration of the joy of building and flying Free Fight(FF) and Control Line (CL) model aircraft.

Radio models are permitted as long as they use diesel engines or un muffled glow engines under 1cc.

http://www.cowramac.asn.au/dodger_2016.pdf

Yeah, fine but, as an electric flyer, I needed a model with oil!

The model of the meet is the Performance Kits Apex but that design certainly didn't thrill me so I looked for something prettier, the Frog Zephyr.

I have scaled the plan up from 33 inch span to 40 inch span & intend to fit an MP Jet 04 diesel. If this isn't powerful enough plan B is to retrofit a Philtech 1.5 cc diesel. I've redesigned the front of the model to accommodate an engine mounting plate so I can swap engines if needed.

Pics soon. John.
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Jun 05, 2016, 02:00 AM
I like real wooden aeroplanes!
Sundancer's Avatar
I've posted your link to the build off thread John. You'll like the Zephyr, it is cute and a good flier.
Jun 05, 2016, 03:59 AM
You made that out of trees?
Boomerang1's Avatar
Thread OP
Thanks for taking care of that.

I thought I would get some building in this afternoon (too windy & rainy for flying) but my garage has flooded! My suburb had more than 250mm rainfall in 24 hours.

No real damage but I would rather not build standing in water.

John.
Jun 05, 2016, 05:04 AM
You made that out of trees?
Boomerang1's Avatar
Thread OP
I have made some progress, wing ribs & the basic fuselage.

While I appreciate these models were built in a different place & time I am
not afraid to modify out some of the daft design features that were popular
at the time. As long as the model has the 'Áharacter ' of the original I'm well
satisfied.

The designer of the original went to great trouble using soldered on pieces of
piano wire with bits of paper fairing wrapped around to achieve the look of those
new-fangled aluminium undercarriage legs. Call me lazy if you like.

No, that's not a nice shiny polished floor!

John.
Last edited by Boomerang1; Jun 05, 2016 at 05:09 AM.
Jun 15, 2016, 02:16 AM
You made that out of trees?
Boomerang1's Avatar
Thread OP
A little more done, fuselage cross braces in, sides joined at rear.

Battery box made for the 350 mAh 2 cell lipo for the radio to be
used with a home made voltage regulator to power the radio.
Jun 15, 2016, 02:47 AM
I like real wooden aeroplanes!
Sundancer's Avatar
Coming on nicely John. Couple of photos of mine to show you what it looks like finished and in flight - hopefully yours will be 2.4 gig (as mine now is) so won't be trailing all that 35 MHz aerial behind it!
Jun 15, 2016, 09:46 PM
You made that out of trees?
Boomerang1's Avatar
Thread OP
Light plywood servo mounting & the Bakelite engine mounting plate.

The MP Jet 04 was never going to fit sideways anyway without chopping
most of the front of the cowl away, the original used a Frog 50 which, being
front induction, is much longer from the cylinder to the prop driver.

Yes, it will be on 2.4 ghz, my transmitter is a bit of an overkill but it's always
handy to have 12 spare channels up your sleeve if needed!

For some reason pictures I rotate during editing end up sideways again on RCGroups
Jun 18, 2016, 04:29 AM
You made that out of trees?
Boomerang1's Avatar
Thread OP
On to the cowl.

As always the little detail bits take the most time.
Jun 18, 2016, 04:39 AM
I like real wooden aeroplanes!
Sundancer's Avatar
Nice job on the cowl, fitting it around the sticky-out bits.
Jun 18, 2016, 05:41 AM
You made that out of trees?
Boomerang1's Avatar
Thread OP
Yes, thanks, happy with that.

I wanted to be able to choke the engine so had to make room
to block the venturi with a finger.

I have to figure out how to secure the cowl now. Not sure about
magnets with the engine vibration. Thinking cap on!
Jun 18, 2016, 07:25 AM
Registered User
Gluehand's Avatar
Quote:
Thinking cap on!
What cannot be hidden anyway, accentuating it, is sometimes the neatest solution....

This hook/elastic method has been seen practised with sports cars etc etc.
I once tried this with a good result, on a semi-scale model. Worked great....

....my 2 C's.....

Last edited by Gluehand; Jun 18, 2016 at 08:16 AM.
Jun 18, 2016, 09:06 PM
You made that out of trees?
Boomerang1's Avatar
Thread OP
Thanks for the suggestion Gluehand. That will be my plan B if my method fails.

I made some slots in the engine mounting plate & bent some clips from piano wire.
The cowl just clips on but can be removed easily by undoing the clips with a small
screwdriver through the hole in the top of the cowl.

Sorted out the voltage regulator too, just re-used the one from my Roaring 20, not
needed since converted to electric power.
Jun 26, 2016, 01:54 AM
You made that out of trees?
Boomerang1's Avatar
Thread OP
Working on the tail feathers at the moment.

My wife bought me a great birthday present (a new motorcycle!) so I've decided to make the Zephyr break down into smaller components so it can be transported in a more reasonably
sized box on the bike.

The fin will detach from the tailplane, both will detach from the fuselage. I was going to simply
glue them on. The wing will now be three piece, centre section plus the wing panels.
Jun 26, 2016, 11:27 AM
I like thermals
Taking the new bike to Cowra?
Jun 26, 2016, 11:47 AM
Registered User
Gluehand's Avatar
Quote:
Originally Posted by Boomerang1
so I've decided to make the Zephyr break down into smaller components so it can be transported in a more reasonably
sized box on the bike.
This was unsought brought to my mind........yep, neat solutions are definitely within reach....



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