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Gale-Force Ultra GTP
This is just a teaser, but I've thought of resurrecting the EDF-powered GTP in light of this new forum we have here. I think it would be a sweet "Project-X". A lot of you probably remember when I first had the idea. It never really got started because I didn't have the funds to buy what I needed. I still don't and that's why this is a teaser thread. I REALLY WANT TO BUILD IT! I just can't until I have about $2000 in liquid assets. So it may take a while.
Be patient. |
shoot us linc, a picture, something...:wink: sounds really cool.. I'm looking forward to it..:yes:
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that's TOOOO fricken COOL...
OOOOooo no you got me thinking about the possibilities.. Thank you!!! (your such a giver!).. |
Whoa. How do you plan to slow it down? Mech. brakes?
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Or have a servo actuated deflector like real jets use to slow down. That would be sweet.
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Naw, no parachute. Sorry. :mdr: Definitely mechanical brakes. Though I want to put one on each wheel, if possible. Instead of just one or two on the center dogbones.
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How about all three? That would be sweet. There was a turbine car in rc car action a bit ago I believe. Actually a truck.
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A cheaper alternative to that combo would be to get the EDF unit alone:
http://www.airpowernet.com/twe/produ...roducts_id=530 (6mm shaft version for KB-45) Buy a KB-45 XL motor with a kv that will net you a max of about 30,000 RPM with the desired voltage, and buy my HV-110 :yes:. |
The KB-45s get kinda hot don't they? I'm using one for a power drill conversion and it heats up very quickly. I know the high voltage will be better for efficiency, but how much better? Would I still get 10 lbs. of thrust from it?
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If you're using the KB-45 in a power drill, I'm guessing it is way undergeared (over-revving). Obviously power drills are designed with brushed motors, which are typically much lower powered than a brushless motor of the same size.
If the motor were to hit 30,175 RPM, it should give 12.33lb of thrust as noted on the last link I posted. Thrust should be proportional to RPM. |
I was thinking about the wasted power versus a more efficient motor. I know it's possible to get the same thrust, but it would use a lot more power since I'd need a higher-Kv motor to make up for the losses.
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A Neu would definitely be a better non-budget minded motor
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I don't at all mind spending the money for quaulity stuff. It might take longer to finish but I'll be much happier with it when it's done.
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looks like fun, do you think 13lbs of thrust will move a 8-10lb car?
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Think of it like that experiment you may have done in high school physics. Hang two weights over a pully, one 9 lb. weight and one 13 lb. weight. If the fan can lift it vertically then it will definitely not have trouble moving it horizintally. |
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thats a good point i was just thinking about how fighter jets make 10x their weight in thrust but then they also travle much faster than a gtp :lol: how fast shoud it be able to go? are u planning on putting a screen over the fan to protect it from debris |
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How fast? IDK, the efflux speed is around 200mph I think. Sooo depending on ground friction and aerodynamics I think a reasonable estimate would be 150mph.(?) Assuming it didn't disintegrate beforehand. I dont think I'll be putting a grate over the fan. 1: it's ugly, 2: it adds drag, and 3: I'm not dumb enough to put my fingers anywhere near the fan when the system is turned on. :tongue: |
I think you should make the fans able to tilt downward so you can take the car airborne at 100+. :yipi:
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That will be V2.....
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I thought this was already V3 of the GTP?
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I can't help but notice the lack of any pictures... :wink:
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No. :smile:
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