Chief Delphi - Team 2526 - Propeller Propulsion Prototype.

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- - Team 2526 - Propeller Propulsion Prototype. (http://www.chiefdelphi.com/forums/showthread.php?t=71876)

Re: Team 2526 - Propeller Propulsion Prototype.

Quote:

Originally Posted by Koosley (Post 801724)

We got a little anxious and decided to mount the prototype prop onto our chassis frame just to see it go somewhere :). Here is a short video of it moving only by a single propeller

http://www.youtube.com/watch?v=I24NW...e=channel_page
or
http://www.facebook.com/video/video.php?v=45518718790

We are currently looking for a way to attach the big 54 nub sprocket (its the big one) to our 8mm shaft on the cim motor without using masking tape. If anyone has a way of going about doing this, it would be awesome.

We also tested the vehicle on carpet to test if it will move, it did, but it was really slow and boring, so I never bothered uploading it.

Enjoy

Gentlemen:

These are incredible dangerous practices - almost beyond belief. Are you trying for a Darwin award? You're in the wrong competition for that.

1. NEVER EVER have people standing around in the plane prop rotation. When (not if) you throw a blade (or even a chain) they could be seriously injured.

2. There should be no extra people anywhere near such a prop until you have it completely shrouded protecting everyone.

3. Use a speed controller. No-one (still living) ever connects an electric prop motor direct to a battery capable of delivering 720 amps like this, especially sitting directly in front of the props direction of travel. The controller will allow you to slowly bring the prop up to speed and check for vibrations, etc.

4. You don't need this on a robot. Make a safe test stand and measure thrust with that.

5. What kind of chain are you using? Are you exceeding the limits onf chain speed? The torque loads on the prop don't call for anything near this.

6. It will not be good for the FRC program to have the kind of injuries you are inviting with this practices. Please stop until you get help from someone that understands the hazards.

Re: Team 2526 - Propeller Propulsion Prototype.

Quote:

Originally Posted by writchie (Post 801898)

Yeah I agree with what you said. We just rushed to mount the prototype in order to disprove any skepticism our team had. So inevitably, safety was the first thing that was overlooked... Atleast everyone wore safety glasses...:(

Re: Team 2526 - Propeller Propulsion Prototype.

Personally I think we'd have to do a bit more to win the Darwin award. Yes, I do agree with the safety issue, but we're all humans (at least I think) when we hear something noisy and or something that is spinning really fast everyone tends to crowd around regardless of what anyone else says. Also I'm sure other teams somewhere are doing other dangerous things it's just that they don't post it online. Anyways thank you for your concern we plan to add a cage around the props for our prototype two.