Let's see...

1. Because of the desire for unlimited vertical performance.

2. Because that's the only motor the builder has that's remotely suitable for the project.

3. Because, with experience, a modeler knows what an airframe can and cannot handle.

4. Because there is a throttle.

5. Because it helps the balance.

6. Because they want to.

7. Because they know that most import manufacturers are VERY conservative for legal reasons.

8. Because they saw it fly as the manufacturer recommended and it was a total dog.

9. Because overpowered is fun.

10. Because its Thursday.

11. Because they only live once.

12. Because they want to see what happens.

...more?


Forgot to mention...I have a Kyosho Giles-202 .60 that is getting assmebled right now with a YS91 on the nose. It won't rip off the firewall. I'm sure airplane will follow the motor/firewall around. Think about that for a minute!!! Perhaps if I anchored the tail and let it blast at full throttle for a few hours it may loosen up, but in my application, the motor, firewall, and airplane are all going to be moving together as a group. For my reasons, refer to the following: 1, 2, 3, 4, 6, 9, 10

Mark