Left & Right props?

[LooverlijnParticipant @looverlijn]

Got the two props for my Yorkshireman, took them out of the packets (which were labelled left and right) but now I'm not sure which is which.

Viewed from the stern; does the right (S'bord) prop turn clockwise and t'other one rotate anti-clockwise?

Cheers

Paul

[LooverlijnParticipant @looverlijn]

How to tell which is which?

[Dave MilbournParticipant @davemilbourn48782]

Got it in one.

[Bob Abell 2Participant @bobabell2]

I think Paul is referring to the hand of the props, Dave

Paul

Look at the end of the prop…..Any end…..The spiral will be the same as a normal screw for a RH thread prop

I'm not saying which prop goes on the starboard side though

Are the propshaft threads handed?

Hope this makes sense

Bob

[Bob Abell 2Participant @bobabell2]

Your in luck here, Paul

Thanks to our old friend Andy Hustler, he has posted a picture of his Graf Spey props and it`s just up your street!

Right hand prop on the starboard side

Thanks Andy

Bob

[Malcolm FraryParticipant @malcolmfrary95515]

Shafts are all threaded the same way, Manufacturers tend to avoid things like left hand threads.

The rotation of port and starboard props tends to differ between commercial ships like tugs where maneuverability is important, and warships, where performance is king. That's what I was told years ago. In practical terms, on a model, it is very likely that it won't make any difference until you see a photo of the real thing and realize that they are "wrong".

[Dave MilbournParticipant @davemilbourn48782]

I think Paul is referring to the hand of the props, Dave

Yes, Bob – that I understood and my post indicated, in what I hoped was a positive way, that Paul's interpretation was absolutely correct. This has subsequently been shown to be fact – in accordance with Andy's photo which you posted.
Am I missing a point somewhere?
It's been one of those 'uncertain' days…………………
DM

[David Marks 2Participant @davidmarks2]

Can I suggest that the method for establishing if a thread is R/H or L/H could be used? I trained mechanical apprentices for a good few years and this method I found fool-proof. Look at the thread (or prop) from the side and at the same time hold out both hands with the fingers (and more importantly the thumbs) spread apart. If the spiral (helix) of the thread (or prop) follows the angle of the thumb of the right hand then it is a R/H thread (or prop).

[LooverlijnParticipant @looverlijn]

Wow! that caused a bit of a debate didn't it? Needless to say I am now confident that I will be able to mount the props correctly so once again thanks fellas. I must admit that the Yorkshireman build is causing a few chewed nails and angst with trying to mount two propshafts in Kort fittings in front of two rudders and get everything lined up before setting to with the epoxy. I thought that getting the motors bedded in properly would be the hardest bit but that's going to be a piece of cake compared to getting this lot right. It's not as if I can start with the Kort supports then add the prop supports then add the next bit… Everything seems to depend on the bit next to it for alignment and I just don't have enough hands to hold everything for 5 minutes while the epoxy sets! Hey Ho! Maybe I should be using 30 min epoxy.. what do you think?

[LARRY WHETTONParticipant @larrywhetton68737]

Hi

My in put to line up ,put down a set of datum marks,

do the set up and use blue tack to hold in place, check again when happy ,

temporary tack with e/poxy when happy fine tune , check for free running, and alinement ,

do filling and protect from knocks and dust,……..good luck …Larry..

[LooverlijnParticipant @looverlijn]

After all this good work and advice I still managed to get it wrong… See, I had the hull upside down to fit the rudders and Korts and once they were solid I fitted the props.. yeah you got it ..with the hull still upside down so when it was turned the right way. (port anticlockwise – s'bord clockwise). well the rest you can guess. Luckily there was enough room around the Korts to wiggle the props out and fit them correctly. I wonder if I'm the first person to do this!

[LARRY WHETTONParticipant @larrywhetton68737]

Looverlijn,

Welcome to the blunder club, see as I posted it pays to keep checking,

keep on rocking cheers Larry…

[Malcolm FraryParticipant @malcolmfrary95515]

Certainly not the first, most certainly not the last. Do not believe magazine articles where only minor mishaps occur, these are either a description of a miracle or work of fiction. Take your pick. You have noticed that it is a good idea to arrange things such that your creation can be serviced. This is a GOOD THING, and will help the model have a long life.

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