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Author Topic: Ellwood Toffee Rocket  (Read 2402 times)
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Ellwood
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« on: September 06, 2013, 03:43:41 AM »

Hi, Ive been developing this rocket sled for two and a half years, had her started a few times, but never actually driven her. Next weekend is time to start her, and hoping for some real thrust ( quite a few mods since last time, and now i got sponsored with a 10 KG tube of NOS). Sofie runs on toffee, which when on fire, just loves a good squirt of laughing gas ( NOS).





So heres hoping that all runs well, and she can then be garaged until Feb 2014 Speedweekend on Ice in Orsa Sweden
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manta22
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« Reply #1 on: September 06, 2013, 11:37:24 AM »

Be sure to post videos of your run, Ellwood. Interesting project.

Regards, Neil
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Regards, Neil  Tucson, AZ
mitchell968
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« Reply #2 on: September 06, 2013, 10:45:04 PM »

very kool . i ve modded some sleds but , not like that.  and toffee ? are you kidding ? can you use the cheap stuff , like a heath bar , or do you have to use that fancy toffee from sweden  ?  please keep us posted.     thanks              mitchell
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Ellwood
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« Reply #3 on: September 07, 2013, 05:19:02 AM »

I shall fix videos. I brew my own toffee, last batch was 2 gallons.

Here is an old video so you get some idea of the project. 
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Ellwood
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« Reply #4 on: September 15, 2013, 01:20:29 PM »

One video tells a thousand words! zoom forward to the explosion at 10 minutes. Carnage ! I dont think my toffee rocket is gonna make next speedweekend now.

http://www.youtube.com/watch?v=JT15dJ2ozUw&feature=youtu.be
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saltwheels262
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« Reply #5 on: September 15, 2013, 02:14:08 PM »

that's a dam shame.
lucky that no one was hurt.
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Mobacken Racing
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« Reply #6 on: September 15, 2013, 02:41:04 PM »

You should use a different fuel, sugar based fuels are extremely dangerous since they tend to clog up the nozzle and turn the rocket into a bomb just like in the video just posted.

Oil soaked cardboard is suitable since it is cheap, easy to "refuel" between each run and has a high energy density.
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desotoman
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« Reply #7 on: September 15, 2013, 03:52:15 PM »

Ellwood,

Here are some still pictures of your video.

Tom G.


* explosion 001 (330x248).jpg (95.2 KB, 330x248 - viewed 198 times.)

* explosion 002 (330x248).jpg (95.25 KB, 330x248 - viewed 154 times.)

* explosion 003 (330x248).jpg (96.42 KB, 330x248 - viewed 139 times.)
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Asking questions is one's only way of getting answers. As a young boy I was always taught that there is no such thing as a stupid question. It suggests that the quest for knowledge includes failure, and that just because one person may know less than others they should not be afraid to ask rather than pretend they already know. In many cases multiple people may not know but are too afraid to ask the "stupid question"; the one who asks the question may in fact be doing a service to those around them.
grumm441
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« Reply #8 on: September 15, 2013, 05:02:45 PM »


G
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Ellwood
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« Reply #9 on: September 17, 2013, 12:46:01 PM »

front view of the explosion

http://www.youtube.com/watch?v=R7a-Vsnswl8&feature=youtu.be
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desotoman
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« Reply #10 on: September 17, 2013, 03:55:09 PM »

Ellwood,

I noticed that you started backing up from the rocket just before the fireworks. Did you feel something was going wrong?

Tom G.


* explosion 003 (450x338).jpg (95.22 KB, 450x338 - viewed 133 times.)

* explosion 002 (450x338).jpg (109.38 KB, 450x338 - viewed 138 times.)
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Asking questions is one's only way of getting answers. As a young boy I was always taught that there is no such thing as a stupid question. It suggests that the quest for knowledge includes failure, and that just because one person may know less than others they should not be afraid to ask rather than pretend they already know. In many cases multiple people may not know but are too afraid to ask the "stupid question"; the one who asks the question may in fact be doing a service to those around them.
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« Reply #11 on: September 17, 2013, 04:25:39 PM »

WOW!   shocked  Hope you guys are all OK.

Geo
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Ellwood
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« Reply #12 on: September 19, 2013, 03:31:44 PM »

Hi, yes, we survived alright. But what a tremendous blast. I made one big mistake by pressing the oxygen button - just thought it might give a bit of boost when my laughing gas ran out ! So i guess we all can learn from this by having protective clothing, fire extinguisher, as few folk involved as possible around the rocket, etc. Toffee is not to be messed with. At least my plan of sinking the whole sled in the trailer was a good idea. I wonder how high it would have flown if it wasnt tied down in the trailer and anchored down to the railway line. It will probably cost me 100 dollars to fix Sofie up again.
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