 All right boat, we're gonna do an operation that I've been meaning to do for a while This here is a perfectly drawn scale model of the boat Okay This propeller shaft right here the one on the boat is not perfectly straight. It's pretty close to straight but it's it's a tiny bit bent and it's also a It's just made out of a just like a regular stainless steel pipe that I can bend with my hands It's very malleable if you bend it it stays so it's definitely not straight and That causes vibrations which wastes energy and also I'm pretty sure it's hitting the the internal wall of this tube It goes through so there's a bearing down here But there's no seal so water can get in right so there's a tube that comes all the way up Above the water level so the water can come up, but you know it goes up to here or whatever it doesn't actually come in the boat So this tube is important to be there And I'm pretty sure this pipe is hitting the side of the tube sometimes Just because it's vibrating and that's two problems one if every time it rotates It just like brushes by the edge of the tube That's slowing it down every time just a little bit But that's gonna make a difference and the other problem is it could eventually wear a hole through in through this tube And then you know water would start getting in that would be a problem Although I'm not so worried about the the wearing a hole because if that was gonna happen it would have happened years ago so Regardless, I want to get rid of all the resistance that this bent tube is causing and I Happened to a straight tube check that out. This guy is real straight And it's also some kind of hardened steel Like I can't just I can't just bend it easily, you know, so I think this will stay straight even if it has You know some forces on it trying to bend it a little bit. So I think this will be a much better Propeller shaft than the one that's currently in the boat. It is a little bit heavier But it's I mean a few times isn't gonna make a big difference on that point I mean I sit in I weighed like 200 pounds So an extra five pounds of metal is not gonna be a big deal. So I want to take that propeller shaft out. I Really hope this is long enough And replace it with this one Disconnected with this stuff Yeah, all I really have to do is take this this one bolt out The nut off to pull it out then I take the entire thing out the bottom there I just have to be careful not to lose the little rollers in the bearing You have to stand in the mud, aren't I? All right Yeah loosened Just need to go over there and pull it out All right, let me just barefoot it then get in the mud. Oh didn't have to get in the mud Well, didn't have to get in the water. I just stood on the edge there and I could reach I'll just keep those ready for when I have to go back in the mud This is the one I just took off and here's the one I want to put in All the while looks like it's a very long I It is long Now I should just have to match all the holes All right, I've got a hole up here that fits over the motor. This already has a little hole here So I can just drill that out to the right size And it's a little bit further toward the end so I have to make sure any other holes I measure from the hole not from the end another thing is This pipe is thicker walled and The motor shaft goes inside here. Now on the other one had to put an insert so maybe if I'm lucky this will fit snug or I might have to put a just a thinner insert or if this is tight I Can turn the motor on and hold the file up to it and use it like a lathe Until it fits in here either way That shouldn't be that hard. Okay Drill this out to Quarter-inch I'm pretty sure oh and I'm not going to drill this right through to the other side until after I get it on the motor Because there's a hole through the motor shaft that I'm sure is not perfect. I Couldn't get it perfect on this either. So I'll put the motor shaft in here with whatever space I need get it nice and snug Then when the drill bit through this through the motor shaft, it'll be lined up right to drill the other side There is another thing I want to do while I have all these out These are the rollers for the roller bearing down at the bottom of the Want to check they're all the same thickness Everything's lined up right up here. Oh this totally doesn't matter by the way I just need it to go up to the end of the propeller doesn't even have to go to the end of propeller But it looks like it made it. No one else I'm thinking about switching back to this propeller and carving this one up a Few people told me don't carve up that beautiful propeller, but what am I going to do with it if I don't use it just Let's be sitting around doing nothing I want to make like a hundred useless propellers. I'd rather just Have one useful one Now the reason I'm thinking about carving this propeller up is when I switch to this propeller I was definitely getting better performance and I think that had mostly to do with the lower pitch So higher pitches this way lower pitch would be the blades turning this way So this has a lower pitch than that one The propeller though is still too big for like a one horsepower motor, so I'm pretty sure that's one of the main reasons. I'm still overloading the motor because I'm definitely at full speed I'm definitely using more than the rated motor, you know power capacity whatever So I'm thinking of taking this propeller cutting the blades shorter Shrinking them this way and when I shrink them this way I should be able to do it in a way that lowers the pitch So get the pitch more like this one just with smaller propeller blades thought about carving this one But if I'm going to carve either one I'd rather do this because the aluminum aluminum propeller will Corrowed in the salt water particularly where it's touching a Different metal the stainless steel here. It's not touching anywhere under here, but I mean I could make it not touch either way This is going to get corrosion and get rough because of the corrosion over time However, the fiberglass propeller will be totally fine. So I may as well do that now while I've got all this stuff out Okay, I want the propeller to come right up to this line, but not covering it. I Guess that's all the information I need The old propeller Is still loose. It was loose on that other one the other tube too. I was putting Actually even on on that propeller. I put a little plastic insert wrapped around here to make this snug also though This hole does not make it to the pipe So I'll have to make another hole somewhere up here. I guess. Oh good. I needed a planter to start some seeds Draw this line on each propeller So I should be able to do that by going like All right connect the dots Oh, do I use a hacksaw or an angle grinder? I think I can do a better job with an angle grinder Well, they're actually pretty easy to cut with an angle grinder because You just cut straight down And came out right All right now to change the pitch So I've got a fat edge here. I want to thin it out by taking a bunch off the top here Lowering the pitch That's pretty good rough shaping Things are still strong. That's a good thing Seem to think that's pretty good Significantly smaller than it was Now let's go paint it. Oh Insta stainless steel Fabric glass. All right cone Be nice if I had a fatter piece of plastic, but I'm gonna have to doubles up Boy, I sure could use a 3d printer right now Actually, there's another reason I want a 3d printer. I've been thinking about giant robot designs And I want to build a prototype. All right, silly machine with a broken starter capacitor Do this to get it started. What are the chances this stuff will stick? Stick Oh, come on I just need to stick long enough to get through the lathe Let me see this. One to two hours Fine You know the front end of the propeller is too thin because it's there's a fatter part just ahead of it So I've made this To go in there and give it more of a streamlined Reduction And it almost fits I just need to heat it up and get it a little bit melty and stuff it on there. Yeah, it should be more streamlined All right, that's dry And I trimmed the edges there. Hopefully it's that's enough to get it in my three jaw chuck on the lathe When I get this thing in the right shape, then I can put a screw through it a couple screws through it to hold it together It'll also go inside something So that'll help hold it together. I Just can't put any screws in it now and then You know put it on the lathe because it'll Won't be good It's a sketch skills. All right, I think I can just file this and Come on, come on one thing. I better not forget Which is a screw that goes into the pipe quarter inch hole through here and a little bit smaller hole on the other side So I can tap the hole on the other side Give it some threads and my screw Oh, Master Pisa. Oh nice. I think it's time to put this sucker in place Beautiful All connected in there and that looks nice Okay, when I push this up I can't say it sounds much better out of the water, but let me put it in the water and see how it sounds It doesn't sound any worse though. So that's good All right, I think I'll just shove wait a second You know why it doesn't sound right it's cuz I didn't put the freaking rolly pins in the bearing Good thing I didn't turn on very long All right, let me revise my previous statement that sounded Amazing considering there was no bearing in there at all All right, let me get these things in Then I can get in the boat and drive myself to the hospital to get my brains checked Okay, all my little pieces are stuffed up there Turn this on That sounds much more like the loose fitting unlubricated bearing it should be Now I want to I just want to push the back until it's in the water You know to lubricate the bearing and so the propeller has something to push Whoa, whoa, that is so much quieter than before it's like not all rattly Yeah, like that that little the little thumpy sound is gone. Oh That is amazing. I was hoping it would be gone. All right second speed Let's crank the sucker up. Oh my god. Oh wow it actually lifts the boat hold on the boat drops like an inch Wow, man. I want to go is it deep enough to get in the water yet tides going up right now. I Could probably get it out right now. Oh That boat's parked in the way though Move it. All right. Let me think about this. I also have to make some dinner for some kids Make dinner for the kids or play with my boat. What do I do? Dang it. Oh No one warned me about these dilemmas Well, I think that went really well of course I'll have to take it in the water Check my amp meter. See if I'm actually using less energy and see if I can Get a basic idea of the speed just by sticking my hand in the water or whatever I do Yeah, I don't even mind if I lose a bit of speed. I gotta get the power way down because I'm using too much power. I Still need to get the rest of these barnacles off too the other day when I went to town When I got back I went swimming before I drove in here ran my hand along this and it's still it's still pretty rough It definitely needs to be smoothed out I'll do that. Oh, we got here. Oh 430 I Think it's dinner make all right Lego kids. What's for dinner? What are you guys making? What do you guys want for dinner peanut butter sandwiches? Okay, I got beans macaroni cheese. I don't have time to make beans Bread dough macaroni and cheese. I don't know. I've got this shiny new propeller back there Kind of want to paint the whole boat I could paint it all silver After I got dinner made I threw the boat in the water and did a lap around the island and There is an improvement in in power savings Originally, okay, I don't know what I was originally but the last propeller which was an improvement from the first iteration At low speed. I was I was using 20 amps and just now I was I was down to 18 which is an improvement and Second speed. I was at 30 but now I'm at 26 which is nice and then high speed Before I couldn't even tell because it was off the the amp meter Maxed out. It couldn't tell me what it was doing, but now It reads out as 50 amps Which is the maximum on my amp meter And before it was the needle was going like way past 50 and it was like hitting the edge of the thing So I don't know. There's a significant power savings At all at all speeds and the speeds still seem pretty good I haven't checked the actual speed on any of the propeller Situations I've tried but they've all just been fast Yeah, this one was it was good good speed I think I could still use a little bit lower pitch on the propeller, but it's pretty good and I'm I'm gonna get some better performance Definitely when I get the rest of those barnacles off the bottom of the boat So oh, I also didn't check for mud after I pulled the boat in So, yeah, I definitely can get the the hull smoother which will which will help a lot And we'll even make it so maybe the the pitch of the propeller will be okay Because if it's a smoother boat, it's easier to push you can have a higher-pitch propeller So that might work out fine either way I've been getting improved power reading so good And check how cool math is Because I had all these numbers here And I finally had one of the numbers for the full speed I was able to extrapolate the old power levels of the full speed So the original propeller was like 80 amps the second one was about 63 man That was way overloading so down to 50. That's a lot better. Once I get the barnacles off the boat Hopefully I'll have another column here with some lower numbers and higher speed too because the taking the barnacles off We'll do nothing nothing. There's no there's no downside. It's all