Gas powered electric- a measure of sucess

No wonder you can get away with it **** my arms alone weigh 50 kilo hahaa...light weight :p
KiM

Yep - I've probably got the best power-to-weight ratio on the forum.
Especially with the petrol bike - it goes like @#$% now.
(RSE billet head, 8ml/litre Nulon Pro Octane Booster, #76 main jet, (#73 next), leanest slide needle setting, 2 x 3.5mm holes in stinger/tail-pipe, 2" inside muffler cap. A little rocket.)
... Steve
 
You can believe that regenerative efficiency figure- when I was powering the motor with the engine (making a generator out of the motor)- the output was pitiful.

I have no thought of using 110, just put it out there as a possibility.
Today I go down to the mad scientist lab (workshop for a few more weeks- until it's too cold- then the car goes in it), and try to get the 50cc going without borrowing a carb off another engine. Then, see is how it goes down the road.
Bike is now tolerable (barely) weight wise. The side stand is still able to hold it up. A heavier duty sidestand from years ago would hold it OK.
Since the price of scrap went up last yr? it is hard to find thrown-out bikes. Even though scrap steel is down, the scrappies are all over them.
 
Since the price of scrap went up last yr? it is hard to find thrown-out bikes. Even though scrap steel is down, the scrappies are all over them.

Yep. 5 or 6 weeks ago when I bought the 2-stroke engine kit, I planned to hunt up a second-hand bike to put it into, searched scrap metal joints, the local tip recycling depot, bike shops, garage sales - no luck anywhere.
In the end I gave up and bought a new bike for $300. I'm sort of glad that I did, but the total cost of my project blew out of proportion. Especially when I added the $95 RSE billet head.
... Steve
 
Found a 12lb gen produced in the 60s called the Tiny Tiger. There are a couple of them on EBay in the Home & Garden category.
 
Found a 12lb gen produced in the 60s called the Tiny Tiger. There are a couple of them on EBay in the Home & Garden category.

Went hunting for the 'Tiny Tiger' on eBay and couldn't find them anywhere.
Searched 'Tiny Tiger', 'Tiny Tiger generator', 'Tiny generator' and 'Tiger generator'.
Do you have a link, by chance?
I'm very interested in checking them out.
... Steve
 
The twelve pound generator sounds very interesting!

The 50cc Techumseh is now on the rack. Yesterday was a major victory over the diaphram carb.
They are amazingly simple, still don't know exactly how the pulses are transfered to the diaphram, but it works now.

Engine seems excellent, the alternator is ready to belt-up to the engine.
Have to make a throttle (I must be pretty confident to make the throttle BEFORE going for a test spin).

The engine was very loud before (stock), having a little bolt-on muff. I welded a little box on it to send the exhaust down to a 1/2 npt coupling and into a 3 horse Briggs cigar muffler. VAST difference in noise. Gonna weld another one on the end of it to see if 2 will be much quieter yet.
I did notice, when I put my hand over the exhaust that (doing the same thing) to the Harbor Freight 79cc 4 stroke, the whirring noise was much less- makes sense, no valve train related stuff.
Am thinking about how to silence the intake tract with a goal of wisper quiet motor. I think it is doable.

I love pics and I am home with a notebook pc that I cannot figure out how to do pics on- it has Linex operating system that is not popular with hackers (God has a special place for these devil's helpers), so I will live with it. when I get back to work, I will do some.
 
Sounds like you're getting there, professor.
About the throttle - just make sure you have a good kill switch. Last week I rode home on the kill switch, with the carb slide stuck full open. A kill switch is a good thing.

I'm envious - wish I had a welder. I started my working life, before I discovered electronics, as a panel beater, so I'm pretty comfortable with oxy-acetylene and arc welding, not this new-fangled MIG.

Linux... I'm a computer programmer among other things, (such as a big kid).
I used to specialise in microcontroller programming, circuit design etc., mainly for industrial process control). Still play around a little, but I don't work any more.

Everyone used to tell me to get Linux, but those days are past.
I used to love MS-DOS, too and thought it was wonderful at the time.
Even earlier, I started 25 or more years ago, on a Tandy TRS-80 CoCo > (Colour (color) Computer). A whole 2K of RAM, no such thing as a hard drive - an audio casette recorder for program storage. I thought this one was truly magical. Remember?

Nowadays, unless you're doing hard-core stuff, (not porn), Linux is more of a hindrance than a help.
Says Steve, as he sits here typing on his 300MHz, 128MB RAM, Win98 machine using a dial-up connection.

Keep us posted on the project and don't electrocute yourself.

... Steve
 
The Tiny Tigers were sold. I couldn't find them today either on EBay or EBay Motors.
Honda and Honeywell both make 30lb, 1000w generators that could be frame mounted in a lot of bikes. Power output is no doubt better and less wavey with the modern generators.
 
Well, the e-bike is on hold until winter goes by. We have had a great November with mostly 50 degree temps -unusually warm and time is running out. been at this for a solid month.
I'm whuped. The carb was obstinate and my shoulder hurts from pulling the cord upward from rack height.

But I did learn the wimpyness of another 2 stroke at low revs.
Compared to this Techumseh, the HF 79cc is a blown big block chevy. where the HF accelerated smartly, the 50cc would just groan and slowly go ahead. Once up to speed some, the groan gets a little higher pitch, but it is still flat-out where the HF would have to be throttled back a lot.

From these experiments, the alternator powered set-up is quite viable, but needs twice the cc (maybe more) of a simple gas drive deal.
I have no doubt the bigger (more common) 6hp Techumseh (that I am using on my 24 inch FS non-pedal bike) would be fine.

Steve- I am a welder. I do not have a mig (metalic inert gas) at home. I do stick (love the 1/16th rod at 60 amps for these little projects) and oxy acet.
So, like you, I am in the way- back machine. At work I have everything.
Here, it is always a question of where could I put a new tool?
There is no room in the inn.

I am very tempted to buy a cruiser bike, and see if the HF will fit- up ahead of the pedals, with the alt. down behind it and the e-motor doing a friction drive on back- this would lower the center of gravity of the considerable weight of all this hardware (around 90 pounds total bike wt) - the rack alone is 6 #.
But, the mountain bike has the suspension fork, great brakes, and gears.
I did see a Schwinn at Kmart that I really like but it was $225. Looked real strong though. Had the steel frame, gears and good brakes. Hate to spend that much though. Many bikes are here- mine, my grandkid's, my son's.
 
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