you are dealing with Yanks my boy....an Easter Egg with a hard-on....with V tail is a C model 500....if it originally came with an olive green paint job and military radios it was an OH-6 or Loach.
But you are correct....in one way....the type certificate for the C model shows 369....the OH-6A...which this one is....being on an Experimental certificate is an OH-6A. This OH-6A you fly....which engine does it have installed?
Please explain how ice can form in clear air and very cold temperatures....no rain, snow, sleet, condensation nuclei present.