To Randy or anyone with knowledge,

I picked up 2 OS 46 VFs and 2 OS 40VFs last fall (all but one NIB and that one a 40 with very low time). I had planned to power my new PA plane with the 40, but it's 5 or 6 ounces porkier than I had planned and thought instead I'd go with the 46.

Brett Buck gave me THE setup to try with the 40. Is there any significant difference in setting up the 46? Venturi size, prop, pipe length, etc.? I don't have a lot of experience running these OS engines, so any help will be appreciated.

Oh, one of the 46s was setup by Mr. Smith himself, but the running instructions that he's so good about including were apparently lost along the way. 2 new pipes also came from Mr. Smith.

Rich,

I talked to Brett. He gave me a very good setup for the 40. My question was what would be different for the 46? If anything.

Thanks Randy. I have a couple of Bolly 12x4.25 3 blades to start with.

Bill,

I decided to initially go with a VF mostly because Brett talked me into it. While not as powerful, generally, as the PA or RO-Jett engines, it has the sort of run I was looking for and I got them relatively inexpensively.

On the other hand, the new plane has a removable engine mounting system that will allow relatively easy changes in power train. I'd probably have to lay up a new cowl for the RO-Jett 65 I have. I wouldn't have to for PA 65 I have. Just a new engine mount.

So I figured I'd start off with the OS VF. First the 46 then if I don't need the extra power, I may try the 40 (and .015 lines). If I'm not happy with either, I can go to one of the truck engines.

Randy,

Cool. That will make it easier if I need to do that. But I have high hopes for the 46VF.