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Re: Quadrant
Wow.. That's come a long way from our initial posts about tapered gears and involute tooth forms. Nice work!!
Wow.. That's come a long way from our initial posts about tapered gears and involute tooth forms. Nice work!!
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Now is a good time!
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Steward of MAKOTO [WB Magazine #232], and Honored Member of the LPBC -
Re: Quadrant
The time has finally come to see if the quadrant will actually work as hoped. Enough clutter has been shoved aside to allow the wheelbox to be made and all the parts to be assembled to working order. I'm glad that I made what I did when I did because I have serious doubts about my ability to do this again.
Hey, last resort, I can always go rope-and-pulley.
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Re: Quadrant
So? How'd it go? I installed an Edson rack and pinion steering system in ANNIE. It took considerable time filing, first by Edson, then in my shop, before the gears meshed smoothly, end to end.Comment
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Re: Quadrant
It’s going, Thad. I remember doing much filing when I cast the parts to get the gear to roll smoothly. At this early stage I can turn the shaft with a pair of vice grips from end to end without binding. However, that may change once I’m able to secure the forward bearing. There will also be a rubbing pad installed beneath the quadrant to restrain it’s movement up and down.
JimComment
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Re: Quadrant
[QUOTE=Jim Ledger;6863003 There will also be a rubbing pad installed beneath the quadrant to restrain it’s movement up and down.
Jim[/QUOTE]
Got any spare sheaves to make a roller under and parallel to the pinion axle? Low friction and zero wear solution.It really is quite difficult to build an ugly wooden boat.
The power of the web: Anyone can post anything on the web
The weakness of the web: Anyone can post anything on the web.Comment
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Re: Quadrant
I suppose, Nick,that I could make some kind of roller to support the quadrant from underneath. The difficulty would be making a support which is sufficiently strong while being completely invisible.
My original thinking involved some bacon grease slathered on a Lignum Vitae rubbing block that could be shimmed to account for wear.
JimComment
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Re: Quadrant
Whot? No T&G panelled box to cover the gubbins and keep crap out of the works?
It really is quite difficult to build an ugly wooden boat.
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The weakness of the web: Anyone can post anything on the web.Comment
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Re: Quadrant
Calm yourself, Nick, all's well. Of course there will be a box of sorts to protect the delicate mechanisms from the elements. Things would be much easier if that was all the box had to do, but no, there's more. The seats need some kind of logical termination about halfway up. The engine controls need a logical and useable place to call home. It would be nice if the top were a comfy perch. The inside would make a handy lazarette, and so needs some kind of door or hatch in the front. The box provides the best place to ventilate the entire stern portion of the boat, so some kind of louver might be advantageous. And the wheel needs a lot of support as it's the obvious place to hang on to when the need arises. And nothing can leak.
So, I cut up some leftover bits to represent the sides of the box. Pretend they're tongue and groove. The front has been cut parallel to the angle of the transom because the steering shaft runs perpendicular to the transom, which simplifies the set up of the steering. I want the top angled down towards the stern and have clamped a stick onto the top of one side to represent one possibility. Also, I want some crown to the top, it sheds water, is comfortable to sit upon and looks good. And, it goes without saying, that the top needs to be easily removeable to get at the works below.
It's a bit big, I know. It can be tweaked smaller, but, like engine boxes, extra elbow room is often appreciated.
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Larks
“It’s impossible”, said pride.
“It’s risky”, said experience.
“It’s pointless”, said reason.
“Give it a try”, whispered the heart.
LPBC Beneficiary
"Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great!"Comment
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Re: Quadrant
And the box has to be comfy to sit on so you can lean back against the coaming and steer with your feet....Comment
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Re: Quadrant
Originally posted by sp_clark; [FONT=Verdana
Thank you all for the most excellent suggestions for low-friction materials. There seems to be no shortage. However, I do have some pieces of Lignum Vitae that happen to have some faults which makes them useless for other applications, splits and so forth. My plan, such as it is, is to make a crosswise beam, supported by the sides of the wheelbox, and located directly underneath the quadrant. The top of the beam will be morticed to hold the block in easy contact with the underside of the quadrant. This way the block of material can be shimmed upwards as needed and replaced eventually.
That the wheelbox won't leak, Clark? I think that if the lid's on we'll be okay. After all, it's only rain and spray we need concern ourselves with, any green water will bring bigger worries.
This^^^Comment
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Re: Quadrant
Looks good, Jim!
But, what type of wall hanging will you use to replace the quadrant?
KevinThere are two kinds of boaters: those who have run aground, and those who lie about it.
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Charter Member - - Professional Procrastinators Association of America - - putting things off since 1965 " I'll get around to it tomorrow, .... maybe "
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