I'm looking for anybody here thats done some of the higher levels of model rocketry. What I'm planning to do is attach some solid porpellant model rocket engines to my board (like H or I scale) and set them off mid bomb ^_^
I'm not entirely serious, but then again....I'm not really joking. Any thoughts would be appreciated
I'm actually planning to do this now as my Landyachtz Dh race came, just to prove its possible. Which that rocket luge did. But I'm pretty sure those were different from the Estes and model rocketry propellents.
I was thinkin' tho stitch, instead of duct tape I could just fabricate a metal chassy for it, and bolt it down with the hardware. Then you just get alot of batteries and make a good ignition circuit that applys voltage to all 3 or 4 rockets (however many are needed) at the same time, or maybe make one switch for each rocket so you can make it have stages Model rocket engines are powerfull, but anyone who has had the chance to closely with them knows that there is a relative element of tameness to them. If anyone would happen to know the thrust for each class of engine that would be much appreciated.
i just thought of sumthin it u accelerated the board very rapidly it would shootout from underneath your legs at like 60mph you would have to crouch down and grab the board wicth is how the luger did it. low stable.
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now back to non religious * where\'s my bong
If you think you\'ll fall, you will.
If you think you\'ll make it, you will.
(um....usually)
-Silversurfer
My OTHER idea, which I was seriously considering trying to rig up... Get a high pressure diver's airtank, and get some sort of regulateable high rate of release nozzle system, with a hose, so basically i could have the tank on my back, and the nozzle(s) attached to my ankle(s), with like stick controllers for direction and power. I could go dropknee, and hold the sticks with my hands to control myself... what power!!
probably not feasible, workable, or intelligent, but still a cool idea!
actually, one time after playing paintball i was watching a guy take a 110ci 3000# nitrogen bottle and open the valve and let the bottle fly up like a rocket and catch it and then repeat. of course this is highly dangerous, against all paintball field rules and insurance regulations, and highly stupid but was interesting. it propelled itself nicely. i have one of these bottles for my gun.
looks over at pintail...
Sport rocket motors approved for sale in the United States are stamped with a three-part code that gives the modeler some basic information about the motor's power and behavior:
for example C6-3
1. A letter specifying the total impulse ("C");
2. A number specifying the average thrust ("6");
3. A number specifying the time delay between burnout and recovery ejection ("3").
Total impulse is a measure of the overall total energy contained in a motor, and is measured in Newton-seconds. The letter "C" in our example motor above tells us that there is anywhere from 5.01 to 10.0 N-sec of total impulse available in this motor.
In a typical hobby store you will be able to find engines in power classes from 1/2A to D. However, E, F, and some G motors are also classified as model rocket motors, and modelers certified for high power rocketry by the NAR can purchase motors ranging from H to O.
Since each letter represents twice the power range of the previous letter, total available power increases rapidly the further you progress through the alphabet.
Average thrust is a measure of how slowly or quickly the motor delivers its total energy, and is measured in Newtons. The "6" in our example motor tells us that the energy is delivered at a moderate rate (over about 1.7 seconds). A C4 would deliver weaker thrust over a longer time (about 2.5 seconds), while a C10 would deliver a strong thrust for a shorter time (about a second).
As a rule of thumb, the thrust duration of a motor can be approximated by dividing its total impulse by its average thrust.
Keep in mind that you cannot assume that the actual total impulse of a motor lies at the top end of its letter's power range -- an engine marked "C" might be engineered to deliver only 5.5 Newton-seconds, not 10.
The rocket is traveling very fast at the instant of motor burnout. The time delay allows the rocket to coast to its maximum altitude and slow down before the recovery system (such as a parachute) is activated by the ejection charge.
The time delay is indicated on our sample motor is 3 seconds. Other typical delay choices for C engines are 5 and 7. Longer delays are best for lighter rockets, which will coast upwards for a long time. Heavier rockets usually do better with shorter delays -- otherwise the rocket might fall back down to the ground during the delay time.
Motors marked with a time delay of 0 (e.g., "C6-0") are booster engines. They are not designed to activate recovery systems. They are intended for use as lower-stage engines in multi-stage rockets. They are designed to ignite the next stage engine immediately once their own thrust is finished. Often their labels are printed in a different color to help prevent you from using them in a typical rocket. In a multi-stage rocket, you would usually select a very long delay for your topmost engine.
PS Most engines have an electric ignition switch powered by a 9 volt battery. Traditional and wireless versions are available.
The charge that activates the recovery system will fire toward your feet. So you will need to mount it under your board or make a blast plate for it.
Also those rockets burn very hot so becareful with your board and your skin. Make sure you attach them very securely and in a safe place, I'd recommend under your board.
You also might want to look in to those refillable rocket engines since they would be more cost effective if you plan on doing it more than once.
Awesome! Thanks for the lengthy and informative post stalking butter, you answered everything I was wondering about. This is why forums are so great! I thought I'd touch a bit on how I'm going to do this. I'm not considering just strapping these cylinders to my board and carrying on my merry way, damn the torpedoes and full speed ahead (So to speak). Once I finish the chassy for the engines, I plan to test the board with no load (no person onboard) and moor it down with some rope first; as stalking alreay mentioned the rockets utilize a minor pyrotechnic charge at the end of the burn to deploy a parachute, I'd like to get an idea of what kind of radius that has. Then I plan to make some other tests while the board is already at speed and under light load (like take a cinder block or two, thread a rope through it and have to helpers rolling next to it, just so I can get a good idea of its behaviour in transit. And from there who knows, if it looks like its actually something thats worth my doing (ie, I won't hurt myself badly) then I'm all for it, and ofcourse maximum safety equipment will be used . I'm gonna set up an adress for people to get updates on this, if anyone else has tried this before I'd love to hear some insight. The first test will be in april, so I've got some time
There was a guy who had a rocket luge and he tested it on TV approx. 4-5 yrs? ago. The rockets kicked in at 60mph and he got up to 86mph . It was pretty funny seeing the rockets fire and the accelleration. They also showed some of the unsuccessful attempts,...one...when the rockets fired, he couldn't control it and he flew of the highway into a grassy ditch.I can't remember which show it was but I'm sure if you searched enough I'm sure you could find it.
saw it, it was ripleys believe it or not, or guiness prime time or something stupid like that. It was definatly cool, but i don't intend to go that fast!
oh yah, for sure. The best is with little remote control cars, so you can steer them (crudely) as they speed down the street.
i could never get steering down, so i ended up running the car on fishing line so it could go straight. it would only burn for about 4 seconds, but could go all the way up my block. first i used a gutted r/c car chassis. later i realized that cheaper toy cars would work fine and are even lighter.
I wonder how many "H" size rockets it would take to propell my secret racing device... I think a few of you know of my experimental downhill ..."vehicle"... Now THAT would be a laugh. I even have an old parachute I could use to slow down
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Rocket Board >:)
But go ahead and do it anyways, ok? Oh, and make sure you have someone record it 
Model rocket engines are powerfull, but anyone who has had the chance to closely with them knows that there is a relative element of tameness to them. If anyone would happen to know the thrust for each class of engine that would be much appreciated.
hehe. I built a few rocket cars with D engines which were cool to watch.
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