Calculating top speed on ice...

[Johansson]

Ok, E85 it is then.

It smells better than diesel so I would be glad if it works, I know from my turbocharged motorcycle that E85 normally burns very clean without any soot deposits at all.

How can I tell if the fuel is overheated in the coil? Just by looking inside the tubes before the injectors and watch for deposits?

[ace_fedde]

Hi Anders,

I think that with E85 you don't have to worry about carbonisation at all (unless you generate extra extreem high temperatures)
As stated by me (and challanged after) the carbon is a result of a cracking process.
The ethanol though is extremely stable due to the chemical composition and due tue the short "length" (only 2 carbons long). The gasoline (in E85) is also pretty stable. Mind that an anti knocking quality is also partly an anti cracking quality,since part of the knocking is caused by self combustion of cracking products of the original fuel.
In a diesel engine the cracking process and self combustion is meant to happen, not to fast though.
That's why diesel fuel contains mostly the "long" hydrocarbons while gasoline contains more "crossed" (more stable) hydrocarbons.
Hope you all can follow this fuzzy explanation

Fedde

[milisavljevic]

Hejsan Anders!

How can I tell if the fuel is overheated in the coil?

Given the very short running time of this project (including tests), this is nothing but a distraction.

There are people on forum who use the words "vapouriser coil" as an excuse to remind everyone of
their personal experiences (hint to the clueless: we heard you!), but you can safely use one, just as
dozens (if not hundreds) of other enthusiasts have. And Mr. Fedde is spot on with his observations.

We can cover the care and feeding of vapouriser coils at a later date (hint: steam works wonders!).

Cheers,
M.

[PyroJoe]

GRIM,
Has she sustained solely on liquid gasoline, (93 octane )? Nice work on the coil setup! Ever amazed by your work on fueling. Have a suspicion you could probably fuel a jet on bear whiz:

http://www.eagletshirts.com/c-2-bear-whiz.aspx

Joe
(Dang mericans will brew almost anything)

[Irvine.J]

Joh, how are you bud,
Just a suggestion but if your planning to put the restriction to the heat exchanger at the entry to the copper winding, I'd suggest maybe a high mounting position may be ideal over a low one. Reason being is that your restriction will pool the fluid in the coil till it charges over the top of the CC in this setup.It might be fine as is...maybe... (I've been slack following the thread maybe its been mentioned) I personally would prefer it to be fed somewhat downwards towards the coil but its just me, I feel it would give a more direct throttle response.
Someone posted a picture with a red drawing of a CC mounted vapourizing collar with topside sprayers and topside outlets, it looked really good to me.

[Johansson]

Just fine thank you, could one be any other way when building jet powered vehicles?

Your advice about the coil feed from the top sounds logical, I will post more info and pics once I start to build the fuel system. Four weeks from now I will race my old jetcart on a high speed event on an air strip here in Sweden and I have to make some modifications to it before then, so most work on the kick will have to wait until after the race.

[GRIM]

Has she sustained solely on liquid gasoline, (93 octane )?

Not yet , but preliminary testing suggests that it will , Not too many bears around here, but plenty of whizz

I agree with the obsevation that James made, and have moved the infeed up somewhat since the photos were taken, but still not exactly overhead , Will post details once I have got some results ,

[Johansson]

"We did a first test run of the three wheeled pulsjet kickbike yesterday.."
Video video!!
A engineering friend of mine has a wheeled kick and is very interested !

Here is a link to the movie, it will be an interesting ride for sure...

It is me running with the propane bottle by the way.

http://www.garaget.org/video/6xxbtffonzkd

[Mike Everman]

Bwaaaa ha ha ha ha!

[ace_fedde]

Now I wanna see you ice skating, next to the kick, with a bottle under your arm

Fedde

[Johansson]

Ha, wouldn´t that be a sight to remember...

I got my fuel cell today and it looks really nice, now I´ve got all main parts for the kick so I can do a mock up of the fuel system to see how I can fit it. An effective heat shield between the combustor and fuel cell will be needed...

I also fitted the spark plug to the engine, I had to take the threads off on the lathe and make new ones (1/2"-20) because I hadn´t the right tap for the original threads.

[milisavljevic]

Hejsan Anders!

I got my fuel cell today and it looks really nice.

Indeed!

Cheers,
M.

PS: The fuel injector information we discussed will be with you soon (1-2 days).

[Jutte]

Woohoo...fuel tank runner...yeah!

[Johansson]

I began making the frame this evening, 22mm seamless hydraulic steel tubing for the main frame and 15mm for the engine and fuel system mounts.

I spent over an hour walking around looking at the frame to decide the height and width of it since it has to look like a kick at the same time as it has to be wide enough for stability and with enough space for the fuel cell, pump and throttle. A bucket full of beer helped me a lot in this.

[Mike Everman]

You Swedes are giving the Canadians and Aussies a run for crazyness factor! I love this thread!