Model Boat Mayhem

Mess Deck: General Section => Model Boating => Topic started by: sparkey on September 18, 2015, 03:11:25 pm

Title: Prop information
Post by: sparkey on September 18, 2015, 03:11:25 pm

Hi there,I have forgotten which way round prop pitch coarse rating go,i.e.is 4 more coarse than a 3 or visa versa,thanks for any info provided,it is for a a steam boat which needs a coarse pitch prop.

Title: Re: Prop information
Post by: derekwarner on September 18, 2015, 09:55:37 pm

Morning sparkey.......if by example the prop was designated 4" x 5" LH  %) ..it would be 4" diameter x 5" pitch and left handed

The other things needed are the blade profile and the mounting.......there is a WEB page mentioned on here that has images of different styles and steam is rather unique in its pitch ratio and blade profile..... Derek