| Author | Message | ||
     Luftkoph |
OMG http://up.craigslist.org/mcy/3914810132.html | ||
| Hughlysses |
Looks legit...  | ||
| Froggy |
Here is a backup for when it eventually gets removed or expires: Posted: 2013-07-05, 4:14AM EDT    Yahama 1980's jet bike dual turbine engines - $1000 (northern mi area) For sale an awesome JET BIKE, this is a project machine. equipped with 2 single spool gas turbine jet engines fully built and ran /tested, however the bike is not finished thus still a project and is collecting dust needs some work. A lot has been invested in raw materials and time for the build. THIS BIKE IS NOT A TOY .....IT IS however A VERY COMPLEX MACHINE ..... If you are interested please view the pictures ....Call after 1PM please or leave voice i will get back with you no text no email wont respond ( eight six four- two 4 three- six 4 seven 4) This Bike IS THRUST DRIVEN NOT CHAIN DRIVE...... so fasten your seat belt and hold on ...... best offer Location: northern mi area it's NOT ok to contact this poster with services or other commercial interests Posting ID: 3914810132 Posted: 2013-07-05, 4:14AM EDT Updated: 2013-07-12, 2:44AM EDT | ||
| Thumpthump |
That just looks like a bad idea. | ||
| 86129squids |
  | ||
| Buelliedan |
That would be a pulse jet would it not? I remember them building similar bikes on junkyard wars | ||
| Oldog |
Radial-axial flow - double bypass "engines" I like the PVC inlet piping kinda like a potato gun. | ||
| Luftkoph |
I first thought it was Jay Lenos sanitary garage till I saw the cub cadet,Lenos a kuboto man | ||
| Zane |
What could possibly go wrong? | ||
| Aesquire |
As a bike? no chance. The thrust is going to be just enough to kill you, because it won't wind down instantly when you chop the throttle, and not enough to do salt flat antics, since the engines are crude, fire breathing grenades with the pins pulled. Home made jet engines? I'm trying to think of a use for a disposable $500 jet engine. A temporary one. Disposable ice sled? | ||
| Hybridmomentspass |
hmmm im not seeing the seatbelt that he is referring to.... | ||
| Ourdee |
Only saving grace is that it has a small fuel tank. Needs 2 20 pound propane tanks with the safety valves removed.  | ||
| Natexlh1000 |
First it will set you on fire. THEN it will kill you  | ||
| Ltbuell |
..just call him"Flamin' Moe"....... | ||
| Hybridmomentspass |
LtBuell - NICE REFERENCE!!!! | ||
| Sifo |
Isn't that just a conversion of a turbo charger into a turbine? I didn't really study the plumbing, but that's what it looks like. It's not really a good set up to develop thrust. It's a better set up for taking power off the shaft, but he states it's thrust driven. I doubt it would be that sensational other than the noise that will wake the neighborhood. Aesquire, the turbine doesn't have to spool down to cut the thrust, simply cutting the fuel will stop the expanding gasses providing the thrust. Spooling up tends to be where things really lag. First it will set you on fire. THEN it will kill you That is a possibility! | ||
| Oldog |
can't wait to see the u-tube video on that thing, bet it ends with a bang..... | ||
| Mr_grumpy |
Just a couple Truck turbos bolted to a stretched mc frame. Needs a "Mr Fusion" stuck on it somewhere to make it look really authentic. | ||
| 86129squids |
Someone, quick, pour some NOS in the tank! "Hold my beer, watch this!!!" | ||
| Aesquire |
Ok, Sifo, you're right, the residual thrust probably won't last more than a few seconds before it sets you on fire........  Pulse jets are a much better tech....... or are they? | ||
| Sifo |
This is the sort of engine on this bike. There's not much about it designed to make thrust. There's not much about it designed to be an engine either. Simply strapping on some jet engines available for RC models will get you much better power to weight ratios. I know about zip about pulse jets. I've heard of them on models from decades ago, mostly control line models. I know plans were available from the back of comic books, right next to the adds for you personal flying disk mode of death. | ||
| Aesquire |
\red Warning videos of pulsejets are really loud!{ There are 2 basic types of pulse jet. With valves, like the V-1 flying bomb of WW2, or the 1960's Dynajet that was used in Control line models. http://www.youtube.com/watch?v=GSkTFj9-g0s http://www.youtube.com/watch?v=iZYqnz6sDLM I had one of these, it flew silly fast, was loud as heck, and glowed bright red. I sold my model to a fellow who demolished it, but nor before getting it up to over 200mph, then snapping the control lines and watching it dig a crater. Here's the German V-1 engine. http://www.youtube.com/watch?v=WCsKs2NhdWg The Dynajet used reed valves, the Argus used on the V-1 used venetian blind type valves. The sound struck terror into the hearts of Londoners as they flew over. ( made worse by the fact that the engine would stop, fuel cut off by a timer, just before it's fatal dive and massive explosion. THAT sound, the sudden silence, was the terrifying part. ) The valveless designs are sort of like a 2 stroke expansion chamber with a burner.... Simple to make, and very popular with hobbyists. Often made in a "U" shape, since they generate thrust from both ends. ( one more than the other, but still.... ) http://www.youtube.com/watch?v=ZXxrPIFHoD0 http://www.youtube.com/watch?v=teQXaqeEnl8 http://www.youtube.com/watch?v=uEEw_l9bPNY A different type, the Pressure jet, uses the combustion heat to vaporize/pressurize, the propane fuel and then augmenter/entrainment venturis to mix air and fuel and flow it into the combustion chamber. http://en.wikipedia.org/wiki/Gluhareff_Pressure_Je t http://www.rqriley.com/gluharef.html http://www.youtube.com/watch?v=PBj0ns_auHo Still a loud engine, but quiet compared to the pulsejets. "successfully" flown in a minimal helicopter with screaming, white hot, flaming jets on the rotor tips, ( a toy even I am a bit hesitant to fly ) it's also popular with hobby nuts and is probably the one you used to see the most ads for in the backs of magazines. | ||
| Aesquire |
http://www.pulsejetengines.com/ http://www.pulse-jets.com/ Sorry about the spelling errors above. Once posted I find the links don't work as well after an edit... so I left it. The "turbojet" bike that started this thread is a pretty lame piece of slow junk compared to the suicidal pulse jet karts, bikes, etc. | ||
| Aesquire |
Here's a real crazy guy with some skills. Nice stuff. | ||
| Petethekiller |
http://www.youtube.com/watch?v=qha2kSrqof4 | ||
| Aesquire |
http://www.pjtv.com/?cmd=mpg&mpid=80 A commentary on safety and risk. It's applicable to so many threads, but as motorcycle riders, we willingly take risks as part of our hobby. ( anyone who thinks playing in traffic is safe? ) Once upon a time... 1973 I think, we mounted up Centauri model rocket engines in 4 + 6 clusters, on our bicycles. Bigger than the available Estes engines, they burned harder, longer, and still we only achieved a quick speed boost or a mild kick in the pants. Fun to make it all work, but a failure on practicality. Little kart engines in bicycles and creative gearing, OTOH, got me up to speeds beyond the hardware's ability.... and even more legal trouble, but let's just forget I said that. |
