Nuts - I'm back from a liquid suplier do and this is in play. Alpha - you can't be more embarassed or wrong than I have been. They are a good crowd here - why did you delete your post?
sorry to spoil the fun but a serious answer to a serious question
the boxes are most likley to be 1.:19 and 2.1:1
this was quite usual and the propellersshould have different pitches
to compensate
the other reason for having slightl odd ratios is to spread the gear wear
boats are not planes I once asked a pilot what speed a jumbo took of at and was told 174 knots (i think) most boat people would have said about 175 to 200
Sound like a Broom 35 European, some had perkins 145's with odd boxes and props to match as to make them contrarotating borgwarner could only make them with odd gears to fit in the casing, useless info but there you go.
Alpha asked about an intended boat with twin engines, praps not spinnning at same speed or summink, and wondering if this ok since aeroplanes (that he knows about) would not do the same thing. And asked if we could guess the boat.
ahem soo I gave an answer along the lines of the momentum of aeroplane props being much greater than that of little props, and also boat props were smaller and geared down hence not such great affect so not danger of boat flipping over like praps a plane, and ah also guessed that intended boat was on page 68 of Boats and Planes for sale - but I was quite nice, honest, and then he deleted the post but hey look I wasn't nasty!....
Did you pull your post as well then matts? Poor old Pauline thinks its all her fault and I've held my hand up as well......now we are three......any other contributing factors wish to identifry themselves....!
Yes i did pull my post, felt a bit daft leaving an answer to non-question. However, pauline seems to be mostly taking the blame, so perhaps we can let her cop it, specuially seeing as she doesn't turn up evenings much? You know it makes sense...
I missed the original post. This is like those backwards quiz games where someone says, frexample, "Paddie MacNally followed by Prince Andrew" and you have to guess what the question was.
Most of them are a bit harder than that of course.
... but I'm here now. I don't normally get the chance to use the internet at night cos Sam's all over it but he's being nice tonight and letting me use it - think mebbe cos Christmas is nigh.