Ohhh yeaaahhh I just finished watching the whole video... awesome Q&A, very interesting explaining all challenges you found while building this beast!!!
Workshop tour would be awesome. I'd love to see what you could do with an electric scooter ala goped or that hollyburn p5 beast that has been making the rounds. Nice video, new subscriber!
Sometimes it’s more work and more expensive to use what you have laying around. About 20 years ago I was helping someone build a kitpkane (Seawind 3000), that was a project that the owner and his son tried to build in their spare time for the previous several years. Over that time there were so many revisions, they had lots of extra hardware laying around to work with. But the seats were such a bad design I told him we can order used seats from a real airplane cheaper that will function better and be more comfortable for less money than it would cost to assemble the fiberglass bucket seats, and end up with the same weight. The original landing gear retraction mechanism must have been designed by the same guy who designed the model S GEN1 door handles, which used a threaded rod (not acme threads either, just standard bolt threads), so it would bind up a lot. They sent out new parts and hydraulic cylinders, but designed it to retract the cylinder to retract the landing gear. As you can imagine, once the wheels, brakes, were added, the cylinder didn’t have enough power to retract. It used a standard hydraulic pump from a boat outdrive, and their solution was to jack up the relief valve pressure, which then caused the fuse to pop sometimes. The original oleo struts had about 6” of travel, but their new design called for machining those down to have about 3” of travel. So I had a concept of using the original full length struts and mounting the hydraulic cylinder to extend when retracting the gear, which as you know gives it much more power for the same hydraulic pressure. To convince the owner that it will work and be better than any other Seawind landing gear, I made some 1/4 plywood pieces to show how it all worked, and then showed them the math for what the old peak hydraulic pressure would be and the new one. I can imagine what you can do if you had a pair of off-road Segway or hoverboards to harvest for parts. I think your design would be quite different. The parts sort of set the pathway.
That is true. Much of what I had lying around were aluminum tube, and the G10 panels. When evaluating the drive system it was actually easier to use my drive units than start from scratch. I also had the lipo packs here to use.
Tech Forum, when I say build from scratch, I mean like Steve Jobs, have an idea and find some components already made that do what you want, then just fabricate what you need to make them work together. For you to start from scratch with just that bare motor and 13” tire, and machine everything else, yes, that would have been quite extensive. I know you mentioned you made parts for RC helicopters. Do you have plans to make something battery powered that can fly an hover out of ground effect with you in it, similar Ehang-184? That’s slowly getting within financial reach. Obviously you can make the frame no problem, but the motors, ESCs, batteries, are going to be super expensive if you can’t harvest them off something else.
Matt, just for once can you just bodge something shitty together, so you don't make the rest of us look like total amateurs.. ;) Another exceptional build here. Top Job as ever mate.
Ohhh yeaaahhh I just finished watching the whole video... awesome Q&A, very interesting explaining all challenges you found while building this beast!!!
Please watch his charger video and offer your expertise BrunoPOWEEER!
Workshop tour would be awesome. I'd love to see what you could do with an electric scooter ala goped or that hollyburn p5 beast that has been making the rounds. Nice video, new subscriber!
Yes to the workshop tour. I'd like to see that. Thanks.
Thanks
Workshop tour🤘 Awesome board..
Sometimes it’s more work and more expensive to use what you have laying around. About 20 years ago I was helping someone build a kitpkane (Seawind 3000), that was a project that the owner and his son tried to build in their spare time for the previous several years. Over that time there were so many revisions, they had lots of extra hardware laying around to work with.
But the seats were such a bad design I told him we can order used seats from a real airplane cheaper that will function better and be more comfortable for less money than it would cost to assemble the fiberglass bucket seats, and end up with the same weight.
The original landing gear retraction mechanism must have been designed by the same guy who designed the model S GEN1 door handles, which used a threaded rod (not acme threads either, just standard bolt threads), so it would bind up a lot.
They sent out new parts and hydraulic cylinders, but designed it to retract the cylinder to retract the landing gear. As you can imagine, once the wheels, brakes, were added, the cylinder didn’t have enough power to retract. It used a standard hydraulic pump from a boat outdrive, and their solution was to jack up the relief valve pressure, which then caused the fuse to pop sometimes.
The original oleo struts had about 6” of travel, but their new design called for machining those down to have about 3” of travel.
So I had a concept of using the original full length struts and mounting the hydraulic cylinder to extend when retracting the gear, which as you know gives it much more power for the same hydraulic pressure.
To convince the owner that it will work and be better than any other Seawind landing gear, I made some 1/4 plywood pieces to show how it all worked, and then showed them the math for what the old peak hydraulic pressure would be and the new one.
I can imagine what you can do if you had a pair of off-road Segway or hoverboards to harvest for parts. I think your design would be quite different. The parts sort of set the pathway.
That is true. Much of what I had lying around were aluminum tube, and the G10 panels. When evaluating the drive system it was actually easier to use my drive units than start from scratch.
I also had the lipo packs here to use.
Tech Forum, when I say build from scratch, I mean like Steve Jobs, have an idea and find some components already made that do what you want, then just fabricate what you need to make them work together.
For you to start from scratch with just that bare motor and 13” tire, and machine everything else, yes, that would have been quite extensive.
I know you mentioned you made parts for RC helicopters. Do you have plans to make something battery powered that can fly an hover out of ground effect with you in it, similar Ehang-184? That’s slowly getting within financial reach. Obviously you can make the frame no problem, but the motors, ESCs, batteries, are going to be super expensive if you can’t harvest them off something else.
Why diagonal motor?
Thumbs up for the innovation aspect alone!
Do you have a homepage?
No. My builds stress on Endlesssphere.com. My screen name there is Recumpence.
Matt, just for once can you just bodge something shitty together, so you don't make the rest of us look like total amateurs.. ;)
Another exceptional build here. Top Job as ever mate.
Do you have any cad files for this or sketches?
I do no written design work when I build. I just get the design in my head and start building.