Welcome

*****Skyote #88 gets Bronze Lindy for "Airventure-Oshkosh 2016 Plans Built Champion"******


October, 2007

Welcome to "Skyotelog", the build record of Skyote #88. I assume that you are familar with the Skyote biplane. If not, you should visit http://www.skyote.org/ for a complete introduction to this unique but elusive biplane.

The posts are presented in reverse chronological order (newest first). Or you can click on one of the "Labels" to see all of the posts concerning a specific topic. Click on any photo for a larger image.

All my building experience is limited to Van's RV's so I have no experience with building tube and fabric or "plans building". I have much to learn so take everything I write with a grain of salt and reasonable skepticisim.


I do not intend to follow a "traditional" path for the construction of #88. I intend to employ low level technology and $ to reduce the construction time and difficulty where possible and practical. By low level technology I am referring to CAD, laser, waterjet, CNC. For example:

  • I have purchased a complete wing spar kit from Jerry Kerr.
  • A rib kit from Mr. Bartoe.
  • Brunton Flying Wires and Drag wires from Harvey Swack.
  • CNC profiled tube kits for the fuselage, tail feathers and landing gear from VR3.

In addition I have converted all of the wing fittings, brackets, links, lugs etc. to CAD and had them cut by water jet. I have designed a laser cut wing spar drill template/jig which positions the five spar components so that all of the holes can be drilled in a complete spar as an assembly. I plan to continue converting as many parts as I can to CAD so that I can reduce the "hand-made" components to a minimum.

Note: As of June 2015 I have over 100 CAD files which provide 600+ water jet cut parts for the Skyote.


While it takes a little time, converting the design to CAD is a great way to truly understand the drawings. plus a huge amount of information has been extracted from the rather complex drawings. This can be a great help to others in understanding and interpreting the design.


The Skyote is uniquely suited for conversion to CAD in that a "computer" was used in it's original design. I have read that Mr. Bartoe used a HP calculator to "compute" the design and dimensions of the Skyote. The plans show all of the critical dimensions to three decimal places for X,Y and Z axes.


Amazingly, when I put the design into CAD the resulting 3D models agree with Mr. Bartoe's thee decimal place dimensions about 99.9% of the time. I have found one discrepancy but less than 0.030"!


If you want to build your Skyote as cheaply as possible, or if you enjoy handcrafting the same parts over and over again then my approach to building is not for you!


If you want to build your Skyote in the minimum possible time with highly accurate parts then this approach may be the answer. I personally get a lot of satisfaction out of organizing the project so that it can be produced accurately. Hopefully some of this work will prove useful to others in the future.


Comments are welcome. I will respond as time permits

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Wednesday, November 7, 2007

Trial Fitting Fuselage Tubes

I decided to purchase a CNC profiled tubing kit from VR3 in Canada. Since this was to be the first Skyote kit produced by VR3 there was some design time involved. I placed the order on 9/09/07 and received the complete kit around 10/27/07. Subsequent kits should have a shorter delivery time. As purchaser of Skyote Kit #001 it falls to me to perform the initial check-out of the tubes to confirm that they all fit well and conform to Mr. Bartoe's drawings. The tubes will need to be assembled in 3-D without welding as some of them may need to be modified. This means that the assembly jig will likely be a little more elaborate than what will be required to assemble and weld subsequent tube kits.



The Fuselage Assembly Table was completed on the afternoon of Nov. 2 so we took a shot at assembling a few tubes starting at the firewall. The tubes all fit perfectly. Unfortunately the design of the joint between the firewall tubes and the longerons does not agree with the Skyote Drawings. As supplied, the longeron tubes butt into the firewall tubes which are mitered to each other. The Skyote drawings call for the longerons to extend through and be flush with the forward surface of the firewall tubes. This allows the firewall tubes to butt into the longerons. I spoke to Don VanRaay of VR3 about this discrepancy and he readily agreed to supply replacement tubes per the drawings. We agreed to wait until all of the remaining tubes have been fitted before replacing the tubes in question so that all of the tubes can be corrected at once.

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