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Knight Stik Wheel Ideas

May 02, 2015



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Airfield Models (http://www.airfieldmodels.com/)Knight Stik Wheels

Note:  The main Knight Stik article and the Gallery are not posted yet because the model is not complete.  Clicking links on this page that are supposed to take you to those non-existent pages will take you to the home page instead.  When the model is complete and the pages are posted the links will take you to the correct page.  Sorry for the confusion.

Knight Stik framed up and assembled.The variety of model aircraft wheels that are available to us is pathetic.  The only thing that has changed over the years is the tires have gone from being solid rubber to being hollow rubber to being really ugly, but very lightweight foam.

What irks me even more is that with the proliferation of lightweight park flyers have come a zillion varieties of very light weight wheels for these aircraft and those wheels are much more stylish than what is available to those of us who build larger models.

So the new kids on the block get new fancy pants wheels while we die-hard, lifetime traditional builders get a lifetime of traditionally butt-ugly wheels.

IT'S NOT FAIR!!!!!!  (and everyone I talk to tells me their life is fair and it's only me who life isn't fair to which isn't fair too.)

I donít hear anyone else complaining about it so maybe nobody else cares or they just accept that we have two wheel types to choose from and go on with their lives.

We have balloon wheels, plastic WWI wheels and really ugly, razor-thin racing wheels.

In addition there are some very specialized scale wheels available that are not only expensive but usually only one very large size and they are made for one specific kit.

I try to build really nice model aircraft and I do spend a lot of time agonizing over small details.  But wheels arenít small details.  Theyíre very visible and make a huge difference in the look of the finished model.

So Iíve spent hundreds of hours building a model and then am stuck bolting on ugly plastic wheels with really badly done spokes and generally no style at all.

Iím not a machinist so thereís not a lot I can do about it unless Iím willing to pay a machinist a whole lot of money to make the wheels for me.  And usually the wheels will require actual development to get them right which means making several sets of them.  Not to mention that they wouldn't really be right until molds were made so they could be cast in lightweight plastic.  By that time we've basically set up manufacturing just to get one set of wheels.

One of my co-workers, Joe, was a professional machinist in a prior life.  Iíve spent many hours talking to him about it because Iíve been considering buying a lathe and a milling machine and I know nothing about them.

In the course of these conversations I generously inflicted on him my thoughts about model airplane wheels.  With all the empathy he could muster, he replied, "So?  You're building stupid toy airplanes."

At the time I was in the middle of my Knight Stik project and needed a set of wheels for the plane.  I had planned to use Williams Brothers WWI wheels which are ok but could be improved significantly.  The design has been around for a long time and they have never been updated.

I described to Joe how a stylized version of WWI wheels could be made.  The problem being weight and finding appropriate tires (O-rings with a larger cross-section diameter than the average O-ring).

In the mean time, Joe had the itch to get back into machining.  He was doing a lot of research on Stirling engines and wanted to experiment with them.  One day he came to work and told me he had just purchased a monster WWII era lathe.  This is one of those machines that is so hefty and well built that it will last a thousand years.  Joe told me the bed way was really worn and needed to be replaced but that the lathe came with a new one.  Joe only needed to replace the old one with it.  The lathe also had well worn pulley wheels that he would need to do something about because the belts were slipping.

Other than that, Joe received a lot of expensive tools and accessories with the lathe and he got the whole package dirt cheap.

Then one day he showed up with a set of wheels for me.  Unfortunately, I had only given him a very basic specification with approximate measurements and I hadnít attempted to locate appropriate O-Rings.

The wheels were beautiful, but the rims were machined for an O-Ring with a much smaller cross-sectional diameter than I would use.  And there wasnít enough metal left to increase the diameter.

So Joe told me that I screwed up by giving him a lot of incorrect information and to come back to him when I had my act together.  I apologized repeatedly until he stopped punching me in the face.  I thanked him for that.

I made several calls and found there is only one commonly available O-Ring having both an outer diameter and cross-sectional diameter in the range I needed.  They cost something like six bucks for a package of five.

I ordered them and turned them over to Joe.  I also bought a square chunk of aluminum for twelve dollars and gave that to Joe as well.  Lastly, I gave him a piece of 1/8Ē ID brass tubing to use as axle bearings.

A couple days later Joe came back with three more pairs of wheels.  The set I liked best was the heaviest unfortunately, but considering any of these sets would work and he didnít charge me a dime and they were all beautiful, I didnít complain.

The biggest problem is that all the pairs will add too much weight.  Joe cut the wheels really thin, but they are metal.  The only way to bring the weight down is to remove more material.

So I fired up CorelDraw with which I have very little experience.  After experimenting I had a good base wheel.  I then learned how to create a pattern and duplicate it by rotating it around a point.  Lastly I learned how to use that pattern to be a cookie-cutter and make a punch-out through another drawing object.

Once I had all that stuff down, I was able to turn out a whole lot of example wheels in a very short time.  The wheels shown here are probably about 1/3 of the wheels I drew and all together they took me just a couple of hours.

 
 

Basic turned aluminum WWI style wheel.

A Maltese Cross motif.
Cross is too thin.

A more stylized Maltese Cross.
Doesn't work.

Another stylized Maltese Cross.
Doesn't work.

A stylized Maltese Cross negative.
Of the crosses, I like this one best.

BMW style.
I like it.  Maybe the holes could be a fraction larger.

Another BMW style.
Doesn't work.

And another BMW style.
This is my favorite of all of them, but if any hole isn't dead perfect it will be very noticeable.

Knight Lightning.
Umm... maybe fatter bolts?

Bewildered Spirit.

This way.
Maybe, maybe not.

Ugly squares.
My least favorite.

Ugly triangles.
My second least favorite.

Triangles.
If you swap this one with the next one really quickly it looks animated.

More triangles.
Of the wheels here, this one looks most like a knight's shield.

Kitties with fall-out eyes.
My unemployed dependents unanimously voted for this one.

 
 

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