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>> Home > Tags > propshaft

propshaft
prop shaft
propshaft alignment
shaft diameter
propshop
propshaft
Twin screw by RNinMunich Fleet Admiral!   Posted: 9 days ago
Hi George, Had this snag with my Graupner Graf Spee as well. In my case the stbd prop tube was misaligned 😲 Major surgery 😡 First off; it's unlikely that the motors are perfectly matched, but if the difference is that noticeable I would suspect the cause lies in propshaft resistance and / or dry motor bearings! I would disconnect the prop shafts, oil the motor bearings and run them in a bit off load for a few a minutes. See if you notice a difference there at low speeds. Also; remove both shafts; clean and oil. Clean the tube end bearings with a pipe cleaner and some light machine oil. Squirt some Teflon grease into the tube from the prop end. I use a small plastic syringe for that. Before reassembly check as far as possible that neither shaft or tube is bent at all🤔 If all seems straight reassemble and run the motors at medium speed a minute or two then slowly and see if you can still detect a difference. Reduce the throttle gradually until the motors stop. If one stops significantly before the other that suggests extra friction in that drive train; misalignment somewhere! Thrust washers too tight? BTW: which motors? One ESC or two? Hope this helps! Cheers, Doug 😎

Part1 research information by CB90 Admiral   Posted: 15 days ago
Deck From the construction hand book:- Decking shall be single layer of mahogany plywood, approximately 9/16 inch thick, installed in general accordance with plan, BuShips No. PT486-S1106-411193, subject to development of satisfactory material. Note. I have seen photos of some perhaps later ELCO 80s with planked decks. Planking 62 degrees hull planking angle not 45 degrees as many have used. stern transom at 12 degree angle approximately. Prop shafts of real boat. All three propellers turned in the same direction clockwise looking from rear, not the greatest configuration for a model boat. propshaft angles are around 10 degrees. The centre shaft is at a larger angle to the side ones. The centre prop shaft angle is 11 degrees and the wing prop shafts are 9 degrees. Using these angles may restrict your propeller selection. The centre shaft appears from hull further aft than the side shafts but the propellers are all at the same distance from the stern or transom.

Fitting Propshafts by RNinMunich Fleet Admiral!   Posted: 1 month ago
Was just pullin' your chain a little 😁 Sorry🤔 I'll do a quick measure up for the cutter 😉

Fitting Propshafts by Westquay Fleet Admiral!   Posted: 1 month ago
Rather than a model of a rope making machine, Doug, this is a machine for making model rope. Always wanted one, in case I ever make that marvellous wooden ship model. Martin

Fitting Propshafts by RNinMunich Fleet Admiral!   Posted: 1 month ago
Interesting! Didn't know there is a market for such models 😁

Fitting Propshafts by Westquay Fleet Admiral!   Posted: 1 month ago
I bought one of those bags of gears and got just enough to make a model rope making machine. Martin

Fitting Propshafts by Haverlock Fleet Admiral!   Posted: 1 month ago
keep it for 7 years and if it doesn't come in handy save it for another 7

Fitting Propshafts by RNinMunich Fleet Admiral!   Posted: 1 month ago
Yep, You just never know when STUFF will come in handy do you?😉

Fitting Propshafts by figtree7nts Fleet Admiral!   Posted: 1 month ago
Afternoon Doug, See, this is why I too. Go around buying different supplies!

Fitting Propshafts by RNinMunich Fleet Admiral!   Posted: 1 month ago
Mornin Ed, 1 to 1. Basically cos that's what I've got in those big nylon cogs. Want to use the nylon ones cos they are wide, so more freedom of movement aligning them, and they should be quieter than metal gears. Think they came from old printers! Bought a batch of assorted cogs and pulleys at a flea market here years ago. Now they're coming in handy😊 Main purpose is to get the drive down to the propshaft which is mounted very low down in the hull as can be seen in the pics above 😲 Cheers, Doug 😎

Fitting Propshafts by Haverlock Fleet Admiral!   Posted: 1 month ago
Generally 2 part epoxy unless the hull is made of some strange plastic material. If you have gaps to fill try Milliput ( 2 part epoxy putty).

Fitting Propshafts by figtree7nts Fleet Admiral!   Posted: 1 month ago
Hi Doug, Is the gearing going to be reduced? Or it going to be 1 to 1? 3 to 1 would be good, right!

Fitting Propshafts by RNinMunich Fleet Admiral!   Posted: 1 month ago
Two part Epoxy Andy 👍 But I prefer to glue the tube rather than the shaft! 😲😁

Fitting Propshafts by AndyG009 Lieutenant   Posted: 1 month ago
What do people use to glue propshafts in place ?

engine by RNinMunich Fleet Admiral!   Posted: 1 month ago
Hi Hammer, we're all too Gobsmacked to even think about wondering about cylinders and frame! We're now waiting with bated breath to see how you want to bend the 10BA screw heads 😉😁 This dumb lectrickery engineer, who can't seem to cut a simple 3mm thread on a propshaft, is fascinated by your mechanical wizardry 👍 Keep it coming, can't wait for the test and trials! All the best, Doug 😎