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Old 01-28-2017, 02:33 PM
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Small foam planes don't typically like grass. If the grass is higher than the tires, there is a lot of drag down low on the wheels while the prop is pulling the plane forward, causing it to nose over. However, there could be several issues making the problem worse. First, does the plane roll freely (i.e., no binding or stiffness in the wheels) if you give it a push on a flat surface like your garage floor? Also, when taking off, do you hold full up elevator until the plane if rolling fairly fast and the tail is ready to lift?

It could also be a poor design that places the main landing gear too far rearward. If the first 2 items are not the problem, you can try bending the main landing gear slightly more forward but it may not be much help in thick grass.