Apex Mk14 (oz1574)

 

Apex Mk14 (oz1574) by OFW Fisher 1957 - plan thumbnail

About this Plan

PK Apex Mk14. Free flight gas model for 0.75 to 1.5cc power. Plan says quote: suitable for Free flight, SC radio, PAA load or Clipper cargo events.

Update 11/01/2015: Added wing section drawing, thanks to Humphrey1957.

Quote: "Hi Steve. I had the original wing section. It is here somewhere rolled up with the plan. The rest I took straight from the plan. I scanned the originals and sent them to Dave Brown in Lithgow. I had him cut me several kits one of which was at 60%. It is getting a .25 Schlosser. All the laser cut parts I scanned See the 60% jpg file. The tail is just flat. No section."

Update 16/12/2024: Added kit instructions, thanks to MarkRobinson.

Quote: "Performance Kits Apex Mk 14. INTRODUCTION: The first 'Apex' flew six years ago. However, right from the beginning, it was decided that the Apex should be capable of accommodating a wide variety of power plants, and fitted with single channel radio control if desired. Above all, the machine should be capable of stable flight in even the worst weather conditions, and be as near unbreakable as a model aircraft can be made, consistent with ease of construction, ease of trimming, and a high performance.

Since the Apex Mk.1 took the air, no less than fourteen prototypes have been built and flight tested, under all possible conditions, and with many types of radio control gear installed; so that today we can offer you the Apex Mk.14, in which is embodied the culmination of improvements perfected in its forerunners. The machine can be powered by diesel or glo-plug engines of 0.75 - 1.5 cc capacity, although the more powerful 1 cc and 1.5 cc motors are recommended if radio gear is installed. It might also be of interest to mention that several of the Apex prototypes have been flight tested with every success as float planes, using the two front and one rear float layout.

CONSTRUCTION Fuselage. Commence by covering the plan with wax paper (the inner wrapping of cereal packets is suitable) to prevent the balsa parts from sticking to it. Cut out the nose former F1, and pin it in position over the side elevation. Pin down and cement in place the 3/16 x 3/16 longerons, side spacers, 3/16 x 3/16 members, and cabin outline. The second fuselage side is built over the first.

The fuselage sides are removed from the plan, and carefully separated with a razor blade. Add the formers F3, F4, F6, and the tailplane dowel retaining gussets F10, and F11. The firewall former F2, and rear cabin bulkhead F5, are now cut out and used to align the fuselage sides over the top elevation. Cement the 3/16 x 3/16 top and bottom spacers; and formers F8 and F9 in place. At this stage smear the inside of the nose formers F1, and firewall F2 with balsa cement to prevent fuel saturation. Now mount the engine on the hardwood engine bearers, bend the undercarriage to shape, and bind it securely to the engine bearers with thin twine or carpet thread, and cement securely.

Fit the engine U/C unit in place between the nose formers F1, and butting up against the firewall F2. The space between the engine bearers and the formers Fl is filled in with block balsa, and liberally cemented. The downthrust angle shown on the plan should be reduced by 1° if the Apex is to be used for R/C, or competitive purposes..."

Supplementary file notes

Instructions.
Logo.
Parts scan of some 60% laser cut parts.
Wing section drawing.

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Apex Mk14 (oz1574) by OFW Fisher 1957 - model pic

Datafile:

Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 003.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 004.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 005.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 006.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 007.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 008.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 009.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 010.jpg
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Apex Mk14 (oz1574) by OFW Fisher 1957 - pic 011.jpg
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User comments

Hi there at Outerzone. This year at Oily Hand Diesel Day, hosted by Cowra MAC here in NSW, Australia the 'Apex MK14' was the model of the meet. I have included pics here of my build of the model [model photo] and a group photo of the twenty two models that turned up for the concours judging and fly off [more pics 004]. Of course everyone downloaded their plan from Outerzone. I would add that the Apex is a well mannered and great flying model. There were lots of comments about how ugly it is. But everyone who built one got over that as soon as they flew it. All flew straight off the board with minimal adjustment or fettling. For more info on Oily Hand go to www.cowramac.asn.au.
AndyLuckett - 03/11/2016
I built the Apex 14 when I was 12 in 1963, at that time living in England. Powered by an ED 1cc diesel, on the tiniest amount of fuel it would fly for miles with me running behind it to see where it landed.
JimmyL-C - 29/12/2018
Hi Mary/Steve, Please see attached some pictures of a friends (Allan) 42" Apex, an excellent flying model powered by a 1.3cc Mills diesel [main pic, 007, 008]. If anyone wants to see a video of it flying there is one on my YouTube Channel, here is a link: https://www.youtube.com/watch?v=eb3iaHf49-k
Best wishes,
Mark Robinson - 22/05/2024
Please find attached images [pic 009, 010] of a complete Apex kit, box and instructions, which was sold through Peter Fisher's company Performance Kits. The Apex, along with the Ion, were the very first two kits produced at the formation of Performance Kits in 1957.
Mark Robinson - 16/12/2024
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Download File(s):
  • Apex Mk14 (oz1574)
  • Plan File Filesize: 632KB Filename: Apex_PK_oz1574.pdf
  • Supplement Filesize: 393KB Filename: Apex_PK_oz1574_instructions.pdf
  • Supplement Filesize: 56KB Filename: Apex_PK_oz1574_logo_performance_kits.pdf
  • Supplement Filesize: 89KB Filename: Apex_PK_oz1574_parts_60percent.pdf
  • Supplement Filesize: 24KB Filename: Apex_PK_oz1574_wing_section.pdf
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Notes

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Scaling

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