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Author Topic: GAFHawk 125  (Read 782 times)
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THB
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« on: September 04, 2021, 07:30:47 AM »

For those with an inclination to the obscure and the unloved, here is a real beauty - in my eyes anyway! Hope you will be interested to follow.

The GAF GAFHawk-125 is a one-off utility plane designed and built by a drill component company back in the 80's. And yes the designer had a plan to take on the world of utility aviation...  a dream which did not eventuate...  but sometimes having the dream in the first place is what counts.

The plan comes from Takashi Sugihara and was published in "P-Tech" - a newsletter of the Shonai Peanut group of Nagoya. It's been on my 'to do list' for a while. And it's time!

Here are some pics of the original to get things started.

cheers
Tim

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GAFHawk 125
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Tim
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THB
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« Reply #1 on: September 04, 2021, 07:46:21 AM »

The plans and some early progress...
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Tim
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TheLurker
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« Reply #2 on: September 04, 2021, 08:04:19 AM »

I think that may be the weirdest hybrid of Short Skyvan, Lacey M-10 and Pilatus Porter I've ever seen.  Nevertheless... looking forward to seeing this one come together.

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kaintuck
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« Reply #3 on: September 04, 2021, 09:49:45 AM »

Looks like a skydivers dream wagon!
Marc
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vintagemike
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« Reply #4 on: September 05, 2021, 04:41:53 AM »

Didnt realise a corrugated tin shed could fly!!!
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DHnut
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« Reply #5 on: September 05, 2021, 05:14:14 AM »

Tim,
       You have an ability to find unusual projects. Did this aeroplane lead to the Nomad? There seems to be a cerain resemblance. Week 3 of the lockdown has been busy it is just that I have to get busy with the camera to show the results.
Ricky 
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THB
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« Reply #6 on: September 05, 2021, 06:57:55 AM »

Lurk, Kaintuck, Ricky - no, not related to the Skyvan, Lacey or Nomad - nor was it designed with skydivers in mind - and yes VintageMike, it does prove that a tin shed can fly!

The design process included a flying half-size prototype put together in the workshops of Hawk Industries in Yucca Valley California from a 1956 Piper PA-22-150 Tri-Pacer and made to look like a miniature version of the GAFHawk design (see pic attached) to serve as a testbed for the GAFHawk's development. The aircraft was appropriately named the MiniHawk, and first flew in 1978.

Based on the lessons learned from the Minihawk, an actual GAF-125 prototype was built, and registered as N101GH on 9 December 1981. This much larger aircraft made a successful first flight on 19 August 1982, powered by a Pratt & Whitney PT6A-45R turboprop engine.

So yes Lurk - same engine as many of the Turbo Porter aircraft! Well spotted.
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Tim
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« Reply #7 on: September 05, 2021, 08:28:00 AM »

A little bit of progress with the fuselage frame - yes I can see the Lacey likeness. If only it had about double the wing chord!
cheers
Tim
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Tim
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kaintuck
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« Reply #8 on: September 16, 2021, 03:07:14 PM »

Kinda like a baby moose...........only a mother could love it!!!!!!!! Grin

marc
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OZPAF
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« Reply #9 on: September 16, 2021, 08:40:46 PM »

A modern return to the Junkers era Tim. Smiley Interesting choice.

John
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kaintuck
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« Reply #10 on: October 30, 2021, 07:09:15 AM »

Tim, hows this build going?
Marc
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THB
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« Reply #11 on: January 03, 2022, 03:40:48 AM »

Hi Marc
Going a bit slow to be honest - but managed to get the project going again.
I thought this would be a straight-forward box-with-wings - but managed to snatch complexity from the jaws of simplicity. I couldn't work out how the cockpit/windscreen worked and spend many (not unpleasant) moment staring at the pictures. probably still got it wrong. but making progress...
Tim
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Tim
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THB
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« Reply #12 on: January 11, 2022, 08:20:18 AM »

A little bit more progress... the shed requires wheels and corrugated fuselage siding. Many have advised that the pre-painted Esaki tissue should be used with the shiny side innermost. it seems to work. The corrugations were ruled on with a drawing pen. The wheel hub caps were cut with sharpened brass tube.
Tim
Attached files Thumbnail(s):
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Tim
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TheLurker
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« Reply #13 on: January 11, 2022, 03:59:53 PM »

Very nice.  You can almost hear the loose sheets of wriggly tin banging in the breeze.  Smiley
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DHnut
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« Reply #14 on: January 11, 2022, 05:26:01 PM »

Tim,
      Good to see the progress. It is a really unusual build and the start of a line of thinking that produced a number of useful aircraft.
Ricky
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« Reply #15 on: January 11, 2022, 07:36:55 PM »

       You are making good progress now Tim,  of coarse with this weather you don't have to wait long for the glue to dry Grin
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