Welcome to our forums. For the best in R/C submarine kits, components and accessories, be sure to visit the Nautilus Drydocks
If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
I also found that 1 of the 5 blades was much thicker at the outer end, making it way out of balance.
Had to use the belt sander there.
We're havin' Fun Now! :)
Rick L.
--------------------------------------------
* Asking Questions is a 'Good Thing',
Since Learning is Always a 'Good Thing' *
I've been looking at the gear-ratio question again and now I think a lower ratio may be better with that very light weight aluminum prop. 2.4 is better for a heavier brass version, which needs more torque, but I'm thinking about first trying a 1.95 ratio, which I have. With those very flat blades, a higher RPM may be better for acceleration.
I'm not trying for speed but I want acceleration for fast dynamic dives and surface.
I didn't realize how light weight it is before.
Light weight props spin up faster and easier, so don't require as much torque as a prop made of a heavier material, of same size and pitch. Weight of prop greatly effects acceleration load on motor also.
I learned that when changing aluminum and wood props on experimental-aircraft, boat props have similar effect.
As I said, I'm not after Speed, only Acceleration, so I need to get the prop up to high RPM faster. That's why I'm using an aluminum one, not the brass version.
I'll probably try both ratios to see if there's any difference. Changing them is easy with this design.
Light weight props spin up faster and easier, so don't require as much torque as a prop made of a heavier material, of same size and pitch. Weight of prop greatly effects acceleration load on motor also.
I learned that when changing aluminum and wood props on experimental-aircraft, boat props have similar effect.
As I said, I'm not after Speed, only Acceleration, so I need to get the prop up to high RPM faster. That's why I'm using an aluminum one, not the brass version.
I'll probably try both ratios to see if there's any difference. Changing them is easy with this design.
Oh, for Christ's sake, Rick. Give it a rest. Stop fixating on issues that don't deserve a second thought. Just build the damn thing and stop agonizing over the small-stuff!!!!!
David,
This section of the forum is called 'Builders Treads'.
That's where builders like me talk about our project, ideas we have, and ask questions about it. Hopefully someone like me will offer a friendly suggestion or interesting comment in reply.
That's what I've always tried to do.
Please let this post last until David read it.
Rick L.
--------------------------------------------
* Asking Questions is a 'Good Thing',
Since Learning is Always a 'Good Thing' *
David,
This section of the forum is called 'Builders Treads'.
That's where builders like me talk about our project, ideas we have, and ask questions about it. Hopefully someone like me will offer a friendly suggestion or interesting comment in reply.
That's what I've always tried to do.
There was progress on the Prop project until you told me to Stop,
I don't understand what was wrong with what I was doing, which was posting Info, problems and ideas on the new prop and replying to others comments. Not only a new prop to me but new to the Sub hobby.
I'd still appreciate an answer in the T-class thread, if possible?
There was progress on the Prop project until you told me to Stop,
I don't understand what was wrong with what I was doing, which was posting Info, problems and ideas on the new prop and replying to others comments. Not only a new prop to me but new to the Sub hobby.
I'd still appreciate an answer in the T-class thread, if possible?
You actually have the propeller in hand, you're physically working the problem, not just 'thinking' about it (again)?
I just wanted to add my own two cents, as I have seen the various posts in multiple threads on many other forums about this boat-in-progress.
First off, questions are good! I was a newbie once, and I asked all manner of crazy questions (maybe Dave remembers that?). The one thing that I have learned after years of building is that it is very easy to overanalyze an issue. Many times problems that you see are nothing of the sort, just small bumps or non-issues.
The biggest thing that I can say is that if you get stuck on the details, you miss the big picture. I have seen too many projects that die because the builders get bogged down in details, lose momentum, and finally lose interest. I've snatched up tons of half-started projects like that, and seen many more pass through the subswap forums of many sites.
I think you'll build a great boat, based on what I've seen of your WTC. Post up some pics of your hacked up hull and let's go from there! There's nothing you can do to that sub that can't be fixed. Believe me, I know!
Comment