No not a p-51 I was going with the p-40. I read the review on the new RC plane mag on the spitfire and said it would be a good 2nd low wing plane to graduate to a 60 size warbird, I am just debating on using the 55ax or going with a 4 stroke only a bit smaller in size to save some money, but after my pulse I want a nice top speed so I will most likely go with the OS 55ax as in my pulse 40. My pulse hauls ass with that engine so I can use the p-40 40 size master that, go to my GP minnow with the super tigre G75 and then my TF p-51. Any other suggestions fellas?