Model Boat Mayhem
Mess Deck: General Section => Beginners start here...! => Topic started by: ttony47 on December 30, 2016, 12:45:22 pm
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Hello all is any one able to tell me the diffrence /advantage ? if any of a fineline propshaft against a standard propshaft ,as im constucting my power train in thought and in the basket on cornwall model boats site
Thanks Tony
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Tony......could I suggest you search ....fineline propshaft .....in our MBM search function
You will find a number of comments ....one of which discusses an eccentricity or quality issue
Prop shaft is another good subject to search on...we have quite a number of excellent discussion posts on lubrication
The Fineline product is listed as with a stainless outer tube, whereas other brands have brass or nickel brass outer tubes
If you were to covert a prop shaft by adding an external oiling tube, certainly the brass or nickel brass outer prop shaft tube would be far easier to solder than attempting a welded joint to a stainless tube.............
Derek
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If you were to covert a prop shaft by adding an external oiling tube, certainly the brass or nickel brass outer prop shaft tube would be far easier to solder than attempting a welded joint to a stainless tube.............
Derek
Why not just soft solder it using the correct flux phosphoric acid is one.
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I enjoy soft soldering like [similar] brass/bronze/copper....or any RED metal and use Bakers zinc chloride based liquid flux :-))
Gas flame heating of like RED materials all have similar characteristics in absorbing heat, whereas any of the 300 Grade austenitic series stainless metals have opposite heat reflective tendencies ....all of which do not engender for maintaining the fluid or unburnt state of the flux
From this, I find considering the soft soldering of composite materials such as stainless and brass as a process best not attempted if at all possible
Another consideration would be the cost of the phosphoric acid at 32.50 Pounds UK for as a bottle a little expensive {-) ....and would I ever use this flux again? >>:-(...........
Derek
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The fineline propshafts allow you to have an outer shaft up to the "A" Frame and still retain an almost scale appearance.
Bob
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I used the fineline type on my last build and I am using them again on my current build for the reason above, they look more scale than the standard type.
But they do seem to flex easily because it is also thinwall tube. But if the outer end is supported by an A or P frame or indeed the bracketry of a kort nozzle and the inner ends are also supported then there is no problem with them.
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Have you seen this link http://www.modelboatbits.com/OILER-CLAMP-SYSTEM (http://www.modelboatbits.com/OILER-CLAMP-SYSTEM) ?
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coca cola contains phosphoric acid, great for removing rust.
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My Graupner Lotse came with a fineline prop tube and had a lubricator included. This was a clamp-on and screw down fitting in plastic. I don't know if it still exists in Graupners inventory.
Why solder to the tube? Why not slide a brass sleeve over the tube and solder to that? The brass sleeve with its lube tube attached will be happily fixed using a smear of epoxy.
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Tony......could I suggest you search ....fineline propshaft .....in our MBM search function
You will find a number of comments ....one of which discusses an eccentricity or quality issue
Prop shaft is another good subject to search on...we have quite a number of excellent discussion posts on lubrication
The Fineline product is listed as with a stainless outer tube, whereas other brands have brass or nickel brass outer tubes
If you were to covert a prop shaft by adding an external oiling tube, certainly the brass or nickel brass outer prop shaft tube would be far easier to solder than attempting a welded joint to a stainless tube.............
Derek
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Welding a ss tube could distort it.
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There is no need to weld stainless when you can use a suitable soft solder. While looking at some of the suppliers at the Model engineering Exhibition at London I found this.
http://www.cupalloys.co.uk/soft-solders/index.asp (http://www.cupalloys.co.uk/soft-solders/index.asp)
2207 silver tin flux cored suitable for stainless steel. £5.29 for 1 metre which should do a few shafts. Look at the bottom of the page to find it.
Jim
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That looks good stuff 8)