So here is what was necessary to get round that steering shaft.
Chopped the end off and rotated about 25 degrees then lopped out the remaining pipe and replaced with swanky bends.
It’s actually a bit of a headache. I would probably just build some extractors from scratch next time.
Also, dedcided to run an oil cooler as I have cut about a litre out of the sump (should have got a new sway bar instead but meh) so I could do with the extra capacity.
Trying to find a decent radiator as well. The SC400 one I have is too big for the front of the coupe. Went into the radiator shop but they were all over priced.
Long time no talk.
FINALLY, I have the engine mounted in the race coupe. Mounts are rather rough looking but strong as. All the bolt holes line up like a dream. I still have to make gearbox mount hopefully tomorrow.
I mounted the motor about 25mm over to the passengers side to try give me more space on the drivers side. You will see why in the pics…
Oh hay steering shaft. This is why I move the motor over a bit… Exhaust will be fun.
Also, for the other car – started playing with suspension control. Basic as at the moment. LED is simulating one valve so will eventually have 8 LEDS and 6 potentiometers at least (4 height senders, a height adjust and a speed adjust), maybe some switches too for “speed bump mode” and “Wof / friends driving = only-let-them-go-as-low-as-cert-height” etc
Sheesh, I haven’t posted here for a while. Main reason is uni sucking every inch of motivation and thought processing capability.
I recently changed my major from Mechatronics to Product Development. The degree shares the first half and starts to separate in the 3rd year. I should have done this much sooner but I was a pussy so have a bit of catching up to do. I decided long ago that I did not want to be a technician but was too caught on the thought of following what my father has done to balls up and figure out what I wanted to do. In my younger years I remember thinking often of how someone should make this, or you could totally make that better if you did this, invent this and use it to do this.
The ideas around creating at the moment are what excite me. Building something from nothing. Something that is way better than everything else. Something so far outside the box that people are scared of it. Something that you didn’t even know you even needed but when it appears you have to have it. Material object or a service or an application or a process…
One of the projects of last semester was the “Lucifer Lopper”. A Lucifer is an old brand of match. Essentially a match stick cutter.
We were required to design a machine that uses 30psi compressed air to spin a turbine to power a mechanism that cut matches to 24.3mm at a rate of 1 every 2 seconds.
This is an exercise to get us into designing machines. Of course you will never use a match stick cutter. At first I thought it was a load of rubbish, but it is actually a very very good way of getting people into designing actual things. A lot of the guys have never been in a work shop before.
This is the best design from last year: (and big ups to Dan, it’s good as).
There were a few flaws though, 3 in particular that I wanted to address with my design.
- The operating noise level was insane due to the turbine design.
- The price to build it was crazy expensive due to the amount of expensive material used.
- The shear size of the machine. It’s big.
We were supposed to come up with a design, go to him and get it checked where he will tell you everything that is wrong with it and you can make it better.
I did not do this.
If I had done this, I know that mine would have turned out pretty much exactly like the one above. Basically everyone else’s did. That is stupid.
You may (but probably won’t) remember my post about the VPCD (here) project which was similar. I housed a motor and planetary gearbox inside the drum to save a huge amount of space. I used a similar design for this.
Instead of using an impulse turbine (think pelton water wheel) like the above design which requires pressure, I went for a reaction turbine (like a jet engine) which works better with flow. In using flow over pressure we spread the energy required over a much larger area and there for the noise is drastically reduced. I also wanted the design to vent the air away rather than having it vent to atmosphere/the room you are working in.
Anyway, heres what I ended up with. I would change a lot, especially the knife design but meh, rushed it.
Initially I had a 3 stage gear set inside but this gave a 6000:1 reduction ratio and I thought this may be too much based on the air flow capabilities.
You can see the air is forced into a tight space to increase the velocity. The end flutes hold the gearbox in place from each end and are sealed on the rotating drum by an o-ring.
All the bearings are special self lubricating plastic so no oil is required (unlike the other design). I could talk a lot about everything but I don’t think it’s necessary.
It would need some more time spend on it to get it to a stage where it can actually be built. I would change a lot of things if I were to build it.
As you can see though it meets the criteria I set at the start. Small, quiet and much less material used. It would cost more to build a one off but less if you wanted to make 10000.
Now the best part… Marking interview.
So he sits down beside me and legit thinks I’m working on a concrete mixer. He begins to tell me I’m stupid for not going to him to check, to which I reply “but then it would have looked like everyone elses”. He had no idea where to start so I worked him through how it all works. Every question he had I answered.
He begins to bring up and argument which I remember him going on about in lectures. His argument is about how when Morris brought out the Mini Cooper with the front wheel drive front engine design, it was the best that anyone could have done. That’s why new cars are still build in front wheel drive front engine today, because there is no way better to do it.
Before he could continue with the story I finished it for him and asked him if he thought that in 20 years, new cars will have an internal combustion in the front of it driving the wheels with shafts? He went quite because the answer is obviously no. Motors will be electric, and inside the wheels (or something, We’re working on it). It is for this reason I know we will be forced into recreating what the past has already given us.
The funny thing is, he quoted in one of his lectures a passage in the bible (random, and why I remembered it) that says
There is a path which no fowl knoweth, and which the vulture’s eye hath not seen.
which is absolutely true, yet here he is telling me to do the opposite which is rather hypocritical.
He begins to tell me I am dangerous and foolish for thinking outside of the box and gave me 1 out of 10 for following the rules, which I don’t care because I know hes wrong.
I then make him give me 10 out of 1o for the other things which were based around design, improvement, clear goals, paperwork (I backed up all my claims in the report) etc to which he agreed.
The main points of the post were not about the match stick cutter, but rather the idea or thought behind a design and then actually executing it.
I like the idea of seeking forgiveness rather than asking for permission. If you ask for permission you will never get anywhere. If you execute ideas you will. You can have a thousand ideas for something every day but it you don’t do anything about it, they were all useless.
At the moment, especially in technology, getting to a market first is absolutely key. Facebook just bought instagram for a billi. I can grantee you that if Kevin Systrom (founder of instagram) waited a month longer to get it all perfect, someone else would have done it before him.
I’m thinking about posting more to this blog, actually treating it like most bloggers and opening up to my thoughts, not just random stuff I do with cars. It has advantages and disadvantages and I need to decide if it’s worth it. Maybe later I will expand on that. If you actually read all that – thank you.
One of the highlights of nats was the first proper meeting of the OS velodrome racer division. I had not the time to finish mine however what I witnessed that afternoon was well beyond expectation.
The rules: Well, not many really. Only that the motor has to be of stationary decent. ie, from a water pump, wood splitter, generator, or other machine that is not self propelled (lawn mowers and rotary hoez are still legit).
I believe most of the high fives should be aimed at Joe Goat Flange for sparking the notion in early 2010 at the Taupo Nats there.
The second WOAH moment was at the bicycle gang summit 2011 where ROT808 Stephen and Sentra Dave turned up with their horizontally opposed 2 stroke contraption.
I’m going to guess that you have no idea what a horizontally opposed two stroke is. You may think “har yea subaru lol” but NO.
So here I will explain with a professional drawing:
Take two two stroke motors. Cut the heads off and attach them together with a belt connecting the crank shafts. No there is no head, but the compression is created between the two pistons as they come closer to each other.
Pretty cool tbh. But of course the lifted the bar again this year.
When their weapon for this year started in the car park I couldn’t believe my ears, It’s rotary powered…
So much fun and looking forward to what pops up next time.
The first person to build a steam powered bike will instantly win.
Here are some more photos from the day. Not many as taking photos of velodrome racers is insanely difficult with my limited skill bank.
My favourite event of the year!
Well, what can I say… Usually these epic weekend posts start with and early morning picture and a car on a trailer. Not this time. I decided I’m too old for that. So I booked in the Thursday night at a motel in Taupo, ready to spring out of bed and hit the race track in the morning. What a good move that was!
I never finished my race coupe in time so I took along my camera and spent most of the day shooting cars when I wasn’t driving someone elses.
I had some fantastic duels in the MX5 against Angry Andrew in the silver AW11 MR2. Like old times.
Here is a picture dump anyway.
And of course, some after track day antics at camp in Rotorua where the rest of the weekend would be spent doing various activities.
Like a poker run
More to come!