Search found 173 matches

by geardog32
Fri Jul 08, 2011 10:41 am
Forum: Off-Topic Hobbies
Topic: Thermodynamics question (smart people chime in)
Replies: 9
Views: 1186

Well I talked to my professor today and to my disappointment he told me its a best guess scenario using linear interpolation. I thought that i had to be more accurate than that but I guess my final answers just need to be + or - 5%

Thanks to everyone for your creative answers.
by geardog32
Thu Jul 07, 2011 9:28 pm
Forum: Off-Topic Hobbies
Topic: Thermodynamics question (smart people chime in)
Replies: 9
Views: 1186

Thought about it, but so far in my college career I have not been allowed to use my graphing calculator in 90% of my classes. I even had a calculus professor that wouldn't let us use any type of calculator on exams and quizzes.
by geardog32
Thu Jul 07, 2011 7:20 pm
Forum: Off-Topic Hobbies
Topic: Thermodynamics question (smart people chime in)
Replies: 9
Views: 1186

I'm trying to find the enthalpy (H value) for r134a and all I have is that it is 35 degrees Celsius at 800 kpa and I have a plethora of tables with this data. The problem is that the tables do not have data points at every single temperature and pressure because that would be (theoretically) an infi...
by geardog32
Thu Jul 07, 2011 2:21 pm
Forum: Off-Topic Hobbies
Topic: Thermodynamics question (smart people chime in)
Replies: 9
Views: 1186

Thermodynamics question (smart people chime in)

Im taking a Thermodynamics course and skipped the intro course, I am fine on the concepts and problems with the exception of knowing how to read the damn property tables for instance: I have superheated refrigerant 134a at 800kpa at 35 degrees Celsius but the problem is that my tables temperatures g...
by geardog32
Fri Feb 18, 2011 8:09 pm
Forum: Combustion Cannons
Topic: Stun Gun Help
Replies: 5
Views: 635

Build one!! http://www.free-electronic-circuits.com/circuits/stun-gun.html The 555 circuit puts out a high frequency square tooth wave that can then be stepped up by the transformer. This is all stuff you can get at a rat shack. The thing labeled Q1 is just a transistor, just mind where the base, co...
by geardog32
Thu Feb 17, 2011 7:35 pm
Forum: General How-To & Discussion
Topic: metal lathe or milling machine?
Replies: 8
Views: 1727

looks like a nice hobby lathe but I didn't notice an indexing wheel. If you want to do any thread cutting on the lathe(I would do a lot) an indexing wheel allows you to start your thread cut at the same position each time cutting successively deeper cuts.
by geardog32
Sat Jan 15, 2011 11:23 pm
Forum: General How-To & Discussion
Topic: 2 years of Spudding in 1 minute
Replies: 22
Views: 1350

lemming124 wrote: best minute and three seconds of my day!
THATS WHAT SHE SAID!!!!
by geardog32
Fri Dec 03, 2010 10:18 pm
Forum: SpudFiles Discussion
Topic: It's Just Not the Same
Replies: 9
Views: 822

I could see it getting a decent following. In my experience different forums have different personalities some just like the feel of one forum over another. I am a member of a couple different forums of the same topics and prefer some over another just because of the collective personality of the fo...
by geardog32
Sun Oct 24, 2010 12:45 am
Forum: Ammo & Parts
Topic: Glowing Projectile for Night Flights
Replies: 10
Views: 1826

I watched the shots of it, man that thing is all over the place. Do you have a diagram or something of how you made it?
by geardog32
Tue Oct 19, 2010 7:44 am
Forum: Combustion Cannons
Topic: Decisions decisions!
Replies: 2
Views: 414

I would say an automotive relay with a momentary switch, and then you could also put a diode across the coil in the relay to prevent current going the wrong way when the field collapses.
by geardog32
Fri Oct 08, 2010 4:29 pm
Forum: General How-To & Discussion
Topic: I need Spudgun failure pics please
Replies: 7
Views: 1024

wow! thanks guys i definitely have enough here to make a convincing proposal.


I am always amazed at the response of this forum compared to others I'm a part of.
by geardog32
Thu Oct 07, 2010 8:43 pm
Forum: General How-To & Discussion
Topic: I need Spudgun failure pics please
Replies: 7
Views: 1024

I need Spudgun failure pics please

I am going to be writing a manual on spud guns for my technical and science writing class and I need pictures of spud gun failures for my proposal. I know i have seen many of them on here but the search is not my friend.
by geardog32
Thu Sep 30, 2010 10:20 am
Forum: Pneumatic Cannons
Topic: designing my first pneumatic cannon
Replies: 41
Views: 2337

THIS IS NOT MY DIAGRAM BUT ITS A GOOD ONE!
Image

my cannon based off of it.
Image
Image[/b]
by geardog32
Fri Sep 17, 2010 4:40 pm
Forum: Off-Topic Hobbies
Topic: Applying to College
Replies: 15
Views: 1100

I go to UC, and there coop program was the first and one of the best. its a pretty compact campus and it only takes you 10 min to walk anywhere, the stadium is right in the middle of campus for anyone to use. Miami is full of snoody people. Ohio state is cool if you like Ohio state football. the res...
by geardog32
Sun Sep 12, 2010 11:14 pm
Forum: Combustion Cannons
Topic: Tripple Barrel Spud Cannon
Replies: 15
Views: 3782

wow, thats very impressive, i would like to see a video of it in action just to show exactly how it works. great job!