Three things. What three things? A little bit of This and That. Who is Rex Bunn? Why is he a Polymath? 🤓🏁
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Link do Vídeo
hey Mr Brodie,,hope you been well, and your health is returning, always a pleasure watching you adventures…
It's the details that take the time, it's the details that make the end product what it is. Thanks Paul.
I saw Mitch in the window reflection!
It's not overkill if it makes you happy 😀
Would you have released this if you had found flaws in your mental agility?
Most entertaining, thank you Paul!
Artwork.
I really, really love the look of these frames and I'd love to build one but w/ a bit of a twist…. I'd make it an all electric Aermacchi. 😁
Edit: I was laughing at the part where he said he couldn't read a 700 page book about crankcase breathing but he'll make his own nuts, bolts and washers…. That's the type of book that only gearheads or psychopaths read. I can't talk… If I had access to a machine shop like that I'd be making everything. 😂🤣
Is that a catch can on top?
2:14 ero più gasatodi lui ! 🤣❤
IIRC, the inside of the BSA clutch hubs were threaded for a puller. Is the Cub's like that?
Just watched the previous video and this one , I once owned one of those 350 Aermacchies wish I still had it, I live in South Africa and it was the only one that I had ever seen , love what you do , you have a new subscribe.
yeah! 💪
Hi Paul, Nice work there. only downside I see is that you can use this part probably just on this crankcase. It would surprise me that the thread starts at the same point in all engines.
Amazing Paul, this channel needs to go viral. A world of knowledge. BTW, Thanks for the how-to-tig weld video!
Paul, I can't tell you how much I enjoy your videos. They really make my day and really inspire me to get back into the shop and make some frames again. Thanks for your hard work.
A friend of mine owned one. I broke my foot getting off it.
Hats off, love the attention to detail!
I can’t focus on your job cause the workshop all around you looks so cool!
This bike will end up in a museum a few hundred years from now as a perfect example of lost technology. Beautiful!
Got a question for ya Paul, do you happen to know what a good alloy is for a brake disk? Maybe some sort of stainless, as I have a future project that I will need to make a couple brake discs for. They will be out in the weather so I don't want um to rust.
Hey Mr. Paul, if you were to mis-clock the position of the outlet on the breather insert 180* like you mentioned you could just take your thread pitch (like 20 threads per inch for instance) and divide 1 inch by 20 threads and that gives you .050" per full revolution of threads or .025" for 180 degrees. So you'd just have to face off that much from the underside on the hex and take off .025 from the leading face of the threads to make sure it doesn't go too deep into the cases. I'm sure you probably already knew this but I thought it was worth mentioning because I know I would have messed up the fixture by 180* myself.
Nothing is overkill. You said it yourself, “It takes time to make nice parts.” There are simpler ways but are they nice?
Your choice: Nice or effective – pick both!
What kind of racing will the Aermacchi be used for? The small fuel tank and breather catch tank look a bit odd.
Paul,
Could you do a segment on your motorcycle stands you use to build your bikes?
Jim
Paul you are amazing I love the way you think and execute your designs.
I don't think it's overkill at all.
Nice video of 'wobbly' turning!
Years ago I made an engine breather for 2.3litre Opel Manta GTE I had. (re-built Vauxhall engine, Opel was 'only' 2 litre)
Used the conical spring from bicycle axle quick release to hold down one way valve.
when you lifted accelerator quick, it would 'rattle' as crankcase pressure ventilated. into 1.5 litre catch can. I forget what actual outlet was but way larger than the original.
I read an article somewhere and actually did some maths on requirements, worked out area of multiple holes+10% compared to single large hole.
As usual, done on a very tight budget but sastest car I've ever owned and surprised a lot of very expensive newer models with often much larger engines
Nice work as always.
But that little stainless steel tab to hold the hose in place…that’s what sets it all apart.
Most others, including my self, would probably just put a zip tie around it, at best, and go 🙈
Love the angled mandrel and cardboard aided design!
Overkill is 👌cheers Chris
600 odd pages on crankcase ventilation lol, people like this enrich the world.
Because this vid has everything to do with classic race bike related content, I decided to like before even watching! 🤙🏻
the trip was hard but the smile on your face show how satisfyed you are. Very impressed by your skill. Thx
Back watching the breather a second time. I'm wondering if the Bunn Breather is limited in the vacuum it will hold and to try and figure out what you're actually venting. I was thinking blowby gases which would make the vacuum thought almost go away quietly but the details of the crankcase layout are not familiar…yet. The initial thought that has brought me back was the chance of a vacuum being trapped and allowed to slowly work on a gasket.
Interesting video as always.
PS: I'll try to get to your side of the river soon.
Great work, as always!
Did I miss something? every car & truck engine since the late 70's early 80's till the present has a PCV valve (which is what your Bunn Breather is)
Some are metal, some are plastic, some are straight, some are 90 degrees, etc – all are less than $15 at any auto parts store, and all auto parts stores literally have hundreds, if not thousands of PCV valves? I've installed many, many dozens on race engines, cafe bikes and all sorts of projects- WHY do we have to use this Bunn Breather?
you little Aermacchi is what? 350cc??? so it has 3500c of air going in and out of the crank cases every time the piston goes up and down….
Most cars are: 1500cc? 2500cc? 5000cc (302ci Ford) – 5800cc (350 Chev) …… They all breathe fine with nearly SIX thousand cc of pistons pumping up and down and breathing air every rev – PCV works for them – Bunn Breather is hogwash
Oh, I nearly forgot, never turn down anything from a polymath, especially a book he’s written.
Most of the modern world abhorres polymaths because they confuse mere mortals like us, but they frighten indentured ‘experts’ in every sector much more.
I maintain that it’s simply impossible to understand anything fully without viewing it from different perspectives and often without at least a decent grounding in other allied disciplines.
The powers that shouldn’t be only need technicians to be competent in their own fields, and then only to a certain level. So the training and indoctrination systems channel us all down different narrow with corridors with low ceilings and no windows or doors.
Polymaths usually gather their information and develop their skills outside of the training and indoctrination systems, grazing every source available to them.
Siri reads my ebooks to me. It’s a great way to absorb info.
Peace
it is your bike and your project, carry on, as you wish, we love it.
I can just about recall the version of me that worked with your confidence on paper. Now I find the need to draw everything very accurately on a computer and blow it up to confirm all my assumptions.
I hope the old British bike industry parts size variations disease allows all the Triumph Tiger Cub parts to fit in your good case.
Great work as always Paul. Hugely enjoyable to watch you work. You always inspire me me to battle on with my projects. In a way it’s cool to be the only one trying to mount a BMW F650 Dakar engine (converted to Mikuni or Kehin carb) into a CCM 604 frame. But in other ways it would be nice to compare notes with someone. The fit is so ridiculously tight it’s looking like the frame needs remaking with some subtle adjustments!
Ride safe
You call this an Aermacchi bike but it seems to me this is a Brodie bike with a few Aermacchi parts.
So that valve is a PCV?
It seems to me Rex Bunn went to a great deal of effort to re-create the functionality of a PCV valve that can be found in the valve cover of any 60's or 70's Chevy?
Overkill? Nope, just well engineered.
👍😎👍
Its all about the sall details, keep doing what you do! Thanks for posting.