15hp 5 cylinder yeah that Bad Boy will Cut grass alright, pretty sure this engine is entirely hand made quite incredible!!!! I am wondering about how it is lubricated, dry sump maybe.
Wet sump. The space under the crankshaft, the camshaft housing is full of oil. An impeller-pump spray the crankshaft via an oil-channel. That nozzle is placed too low. That's why the crankpin was stuck. Will be corrected.
Hello from America you crazy Sweedish man you I’ve watch all of your videos and you’re on of the most impressive machinists/engineers that I’ve seen on here and you give us all the gritty details, keep up your amazing and quirky work and TH-cam might make you some extra money for these projects? And if I had to ask you one thing what’s your craziest idea you have brewing? Keep up the good work man seriously (and thank TH-cam for you randomly popping up) lol
Be careful machining that raw "master rod". Some people have tried doing that and have ended up with firearms parts by mistake. You have my highest respect for creating real devices. I am only an idle dreamer, probably like most TH-cam viewers!
The size of the pistons, you should get about 2x the HP from that engine, unless it's because the valves and ports are too small? It's difficult to tell , but the intake runners are way too long for the length, of it's a must to have it so long, I'd try around 40-50mm tubing for about 75% of the length, then reduce down gradually to the original tubing size,
I also made a radial that runs on compressed air. Did not realize the spacing was that far off for the other rods. That explains why it doesn't sound very smooth when it runs.
The problems get bigger on a petrol engine I think. On my engine nr 2 and nr 5 cylinder are affected the most. Nr 2 cylinder hit the TDC more than 10 dgr later. That means the ignition spark comes 10 dgr earlier than expected. On nr 5 cylinder it's the other way around. Nr 2 and 3 cylinders where not so bad. Only ca 4 dgr. Same with the valve timing but I think the ignition suffers the most.
In your next video can you please include in the video notes what the corrected Con-rod big end angles are? I am really curious about what they should be given what you have worked out with how that line of force acts through when they are equally spaced.
Interesting geometry problem on the crankshaft. I would have made the same mistake. I am curious, assuming you are retired, were you a tool maker or machine repairman, or some other journeyman tradesperson? Nice shop!
Yes, I'm retired. Radio & TV repair man from the beginning. No machining education but after 40+ years in the swedish industry you pick up some. And I have been a biker all the time. When I retired from work I got myself some affordable machining tools and here we are...
Ska väl inte va nå svårt att gör en ny vevstake av det där aluminium-ämnet. Det enda du behöver göra är att fräsa bort de bitar som inte ser ut som en vevstake!
Good question. The answer is, I don't know. I was thinking about milling some cooling fins but it will not be enough. Even the cylinders don't have enough airflow. I guess it have to stay as a display-piece only to be run a few minutes.
Why didn't I think of that? The masterrod I have to make a new one anyway. But the four others are possible. I have to make new tunnels for the push rods but that is an easyer work. Good thinking.
In all my decades as a mechanic, I’ve never thought of breaking out the heat gun to warm a small engine flywheel. That was easy as popcorn.
It works really well. Just put a little pressure with the puller and after a couple of minutes it pops.
Very interesting about those angles. I never would have guessed
I always look forward to your videos.nice job👍
Brilliant. Looking forward to the finished product.
You are a wizard and a inspiration
Thank you
15hp 5 cylinder yeah that Bad Boy will Cut grass alright, pretty sure this engine is entirely hand made quite incredible!!!! I am wondering about how it is lubricated, dry sump maybe.
Wet sump. The space under the crankshaft, the camshaft housing is full of oil. An impeller-pump spray the crankshaft via an oil-channel. That nozzle is placed too low. That's why the crankpin was stuck. Will be corrected.
This is going to a fun rebuild , I am enjoying your channel very much !
Just a little more machining. :)
Esse cortador de grama é monstro
Very impressive! Wow
Det är en märklig och också fascinerande motor.
Very informative 👌
Hello from America you crazy Sweedish man you I’ve watch all of your videos and you’re on of the most impressive machinists/engineers that I’ve seen on here and you give us all the gritty details, keep up your amazing and quirky work and TH-cam might make you some extra money for these projects? And if I had to ask you one thing what’s your craziest idea you have brewing? Keep up the good work man seriously (and thank TH-cam for you randomly popping up) lol
Would love to cut my lawns with this beast would be the coolest mower in the nieghbor hood lol
I'm not shure you would. It's quite heavy. Strait forward is ok but.......
I would have made the same mistake with the equal 72 degree spacing of the pivot points. You live and you learn.
That's what makes it fun.
Be careful machining that raw "master rod". Some people have tried doing that and have ended up with firearms parts by mistake.
You have my highest respect for creating real devices. I am only an idle dreamer, probably like most TH-cam viewers!
Can you imagine the lovely sounds it would make if it was a diesel ?
What, knock nock clack clack
Why on earth would you want a diesel for?
The size of the pistons, you should get about 2x the HP from that engine, unless it's because the valves and ports are too small? It's difficult to tell , but the intake runners are way too long for the length, of it's a must to have it so long, I'd try around 40-50mm tubing for about 75% of the length, then reduce down gradually to the original tubing size,
I also made a radial that runs on compressed air. Did not realize the spacing was that far off for the other rods. That explains why it doesn't sound very smooth when it runs.
The problems get bigger on a petrol engine I think. On my engine nr 2 and nr 5 cylinder are affected the most. Nr 2 cylinder hit the TDC more than 10 dgr later. That means the ignition spark comes 10 dgr earlier than expected. On nr 5 cylinder it's the other way around. Nr 2 and 3 cylinders where not so bad. Only ca 4 dgr. Same with the valve timing but I think the ignition suffers the most.
In your next video can you please include in the video notes what the corrected Con-rod big end angles are? I am really curious about what they should be given what you have worked out with how that line of force acts through when they are equally spaced.
I will...
if you are changing the mass of the main rod, your counterweight will also need to be changed?
Yes
👍⭐👍
Interesting geometry problem on the crankshaft. I would have made the same mistake.
I am curious, assuming you are retired, were you a tool maker or machine repairman, or some other journeyman tradesperson? Nice shop!
Yes, I'm retired. Radio & TV repair man from the beginning. No machining education but after 40+ years in the swedish industry you pick up some. And I have been a biker all the time. When I retired from work I got myself some affordable machining tools and here we are...
Why do you have what looks like a burnt piston ?
I have collected pistons from a bunch of lawnmowers of different age and some are coated with something. Don't have a better answer...
Ska väl inte va nå svårt att gör en ny vevstake av det där aluminium-ämnet. Det enda du behöver göra är att fräsa bort de bitar som inte ser ut som en vevstake!
Så sant...
How are you going to cool the cylinder heads?
Good question. The answer is, I don't know. I was thinking about milling some cooling fins but it will not be enough. Even the cylinders don't have enough airflow. I guess it have to stay as a display-piece only to be run a few minutes.
Maybe you can run compound turbos with meth injection and get like 127 hp
Are those Briggs & Stratton pistons?
Yes, and valves, valvesprings, valveseats, flywheel and ignition coils, and more
A shim under each barrel would do the trick. Same as VW motor, or is that not possible.
Why didn't I think of that? The masterrod I have to make a new one anyway. But the four others are possible. I have to make new tunnels for the push rods but that is an easyer work. Good thinking.
Of course brother of course 😂truly incredible
Veldig bra 😁👍
Your shop is too clean and organized other than that great build