YS 1.40 DZ vs. OS 1.40 RX-FI

[Gregor Papez]

Hello! 

I'm buying new engine for my new pattern airplane and now I'm down to these two 
engines. Which is better and more economical to run? I know Dingo needs quite 
amount of nitro in fuel which rises the costs of running it on the other side 
RX-FI has almost double price of Dingo. So the issue here is how much fuel does 
RX-FI burn? Is it true that Dingo needs valve calibration after 3-5 flights? Any 
firsthand experience with any of these engines is welcomed here. 

Greg

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