The first time I ever took the Trainstar to the field, someone remarked that I should put bigger wheels on it. I replied that the wheels were quite big already, to which Sensei replied, "Bigger wheels equal bigger fun".
Having recently started flying the Trainstar from the field again, in what I think will be its summer metamorphosis, I got a rush of blood to the head and decided to get the bigger wheels. The standard units on the Trainstar, installed in spats, are 75mm and looking at what was available I decided on a pair of 100mm foam wheels.
Now 25% larger doesn't seem that much but, to quote one of the reviews, the wheels were much larger than he expected. Ditto. I think it's the square law, or something like that, but it translates into a substantially larger wheel.
The wheels, of the same variety that I fitted to the Canadair, are very light and firm. However, because they are very much over-size in the case of the Trainstar, the firmness will be exaggerated.
However, with a springy undercarriage and landing on grass, I don't expect this to be an issue at all...
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