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Advice request regarding Prop dimensions

Started by Allan
15 replies 42 likes Last activity: 5 years ago
#16

Advice request regarding Prop dimensions

You are welcome Allen.
Good luck with the building of the Calderwood Clyde Puffer.
I am looking forward to the build log.
And any time you have a question just shout.
The good members here will help as best they can.

Martin555.
If it looks right it probably is.
#15

Advice request regarding Prop dimensions

Hi Fred,

Thank you for your input, that's very helpful to know, I'll have a look there. Much appreciated 👍

regards
Allan
Liked by Martin555
#14

Advice request regarding Prop dimensions

Hi Martin, that's very helpful.
Many thanks for this 👍

Regards
Allan
Liked by Martin555
#13

Advice request regarding Prop dimensions

Hi Allan,

The video it for real boats but it can still be used to identify your model props.



Hope this helps.

Martin555.
If it looks right it probably is.
Liked by Scratchbuilder and Allan
#12

Advice request regarding Prop dimensions

Hi Allan

I have nothing to do with this company.

When I have a need for a replacement prop I always go to Prop Shop, Simon is very helpful and has a great knowledge with regards to props.

He is a small company so it may take some time before he answers you questions but he will in time.

Fred
That's all right, Mr Ryan. My Morse is so rusty, I could be sending him dimensions on Playmate of the Month.
Liked by Allan and Martin555
#11

Advice request regarding Prop dimensions

Thanks everyone, I really appreciate the help and support offered on this site, it is invaluable and very much appreciated.

Kind regards
Allan 👍😊
Liked by Martin555 and Colin H and
#10

Advice request regarding Prop dimensions

Thanks Colin,

Thats good advice which has been noted.. 😊👍

Regards
Allan
Liked by Martin555 and Colin H and
#9

Advice request regarding Prop dimensions

Hi Roy

Thank you very much for your help & advice which is helpful and much appreciated, 👍

Regards
Allan
Liked by Martin555 and Colin H and
#7

Advice request regarding Prop dimensions

Thank you, your views/input is very helpful.
Much appreciated

Regards
Allan👍
Liked by Martin555 and Colin H and
#6

Advice request regarding Prop dimensions

I'm certainly not an expert on the matter and can't provide the marine engineer's explanation of the pro's and con's of outboard vs inboard turning wheels, but can say from experience that in a scale model the inboard turning wheels provide the best looking wake. (Aft looking forward, port turning clockwise, stbd turning counter clockwise.)
I don't know if the better performance of either direction could be determined (that is to say would we notice any difference either way...) on our scale equipment, but my gut feel is in-turning wheels throw the water towards the center creating more of a stern wave.
"Good judgment comes from experience, and a lot of that comes from bad judgment." Will Rogers.
Liked by Martin555 and RNinMunich and
#5

Advice request regarding Prop dimensions

Hi Colin.
I agree 💯% with that advice having lost as you say expensive props in the past and trying to coax a crippled boat back to the shore. 👍👍
Regards Bill.
Never give up.It will come right in the end.
Liked by Allan and Colin H and
#4

Advice request regarding Prop dimensions

A very well set question, which Roycv answered very well, just an additional piece of information you may need, is to use a dab of thread lock in the prop as you wouldn't want to lose an expensive prop.
I only mentioned this as it has happened tome when I hit a submerged obstacle.
Cheers Colin.
Fair winds and calm waters,
COLIN.
Liked by RNinMunich and Allan and
#3

Advice request regarding Prop dimensions

Hi, measure the distance beween the tip of the blade and the centre which is the radius then double it to get the diameter, Go for a right hand prop of the same diameter as the white metal one.

Looking from the rear of the boat a RH prop spins clockwise to give forward motion of the boat. If this is not right then reverse the connections to the motor.

The prop shaft will have a thread which is either M4 or 4BA there should be a nut of this same thread and a small washer. You will need a thin spanner of this size.

Fit the washer on first then the nut and screw the prop on afterwards. Then with a spanner gently tighten the nut against the prop and that should lock it in position.

Good luck

Roy
Liked by Allan and Martin555 and
#2

Advice request regarding Prop dimensions

For twin prop boat counter rotating screws i believe but wait for some expert advise.
Liked by Allan and Martin555
#1

Advice request regarding Prop dimensions

Hi

Being a newbie to model boat making and having made a VERY slow start trying to read between the lines of given build instructions with my Calderwood Clyde Puffer kit 🤔, I'm realising just how uniformed i am in regards to skill requirements, experience and model engineering skills.
I'm struggling to get my head around scale of parts. I want to replace the white metal Prop provided with the kit for a brass alternative.
Having had a look on line, i have found similar 3 bladed props, but i am unclear what it means by left / right threaded, I'm guessing for screwing on to the prop shaft and nothing to do with the motor? and I'm unsure how to measure the prop to ensure i get the right size for the scale of the model. I've tried measuring across the blades but that doesn't appear to correlate to what I have found in ads, Any advice / words of wisdom would be Very much appreciated. Thank you in anticipation..
Liked by Martin555 and Scratchbuilder and

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