proper technique of chamber fans
is there a certain technique dealing with chamber fans that yeilds the most power? For instance, do you leave the fan running while injecting fuel and firing?
-
squeaks
- Specialist 3
- Posts: 326
- Joined: Sun Oct 01, 2006 5:45 pm
- Location: Enoch, UT(next to Cedar City)
exactly as mrcrowley said it, it doesn't matter, just use it to mix the fuel around and to vent. You can leave it running but it really doesn't matter.
Make sure you post in the right section obctg. This belongs in the combustion discussion, not showcase-a place where people show combustion cannons.
Make sure you post in the right section obctg. This belongs in the combustion discussion, not showcase-a place where people show combustion cannons.
"Nine out of ten Americans agree that out of ten Americans one will always disagree with the other nine."
-Collin Mockery
Who's Line is it Anyway
Borrow money from a pessimist, he won't expect it back.
-Collin Mockery
Who's Line is it Anyway
Borrow money from a pessimist, he won't expect it back.
oh crap, its been so long since ive posted a new thread. sorry ill dbbl check next time
-
SpudBlaster15
- First Sergeant 3
- Posts: 2400
- Joined: Wed Oct 18, 2006 11:12 pm
- Has thanked: 2 times
- Been thanked: 10 times
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.
Last edited by SpudBlaster15 on Wed Jul 14, 2021 12:43 pm, edited 1 time in total.
-
joannaardway
- Corporal 5
- Posts: 949
- Joined: Mon Oct 09, 2006 4:57 pm
- Location: SW Hertfordshire, England, UK.
I'd leave it on. There's enough evidence that it makes a noticable difference.
If you're behaving and using rechargable batteries to run it, then there shouldn't be any problems.
If you're behaving and using rechargable batteries to run it, then there shouldn't be any problems.
Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
-
Pete Zaria
- Corporal 5
- Posts: 954
- Joined: Fri Mar 31, 2006 6:04 pm
- Location: Near Seattle, WA
@ PVCMAN,
Most modern computer fans are "brushless" and don't create sparks.
I've thought about trying to find a fan that does have brushes, which could be used for both fuel mixing AND ignition. It would be handy.
Peace,
Pete Zaria.
Most modern computer fans are "brushless" and don't create sparks.
I've thought about trying to find a fan that does have brushes, which could be used for both fuel mixing AND ignition. It would be handy.
Peace,
Pete Zaria.
-
SpudBlaster15
- First Sergeant 3
- Posts: 2400
- Joined: Wed Oct 18, 2006 11:12 pm
- Has thanked: 2 times
- Been thanked: 10 times
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.
Last edited by SpudBlaster15 on Wed Jul 14, 2021 1:02 pm, edited 1 time in total.
You need to make a motor yourself if you want to guarantee serious sparking.
Then because of the sparking you're getting you'll need to repair it every now and again becuase the sparking corrodes the contacts like hell.
Not really the most reliable way to ignite the mix even so.
Then because of the sparking you're getting you'll need to repair it every now and again becuase the sparking corrodes the contacts like hell.
Not really the most reliable way to ignite the mix even so.
-
mark.f
- Sergeant Major 4
- Posts: 3638
- Joined: Sat May 06, 2006 11:18 am
- Location: The Big Steezy
- Has thanked: 58 times
- Been thanked: 58 times
- Contact:
Alright here's the scoop (:D )...
My friend is currently working on his launcher. Since a 6x15" chamber is rather large, he thought a normal fan couldn't do it.
He's now currently using the motor he ripped out of something-or-the-other with a 12v rechargeable battery. When you remove the leads from the battery, (which are, now, just alligator clips), you get some serious sparking. Well enough to ignite the mixture...
The important thing is to make sure you have a good connection. He's going to be using some hoop connectors with threaded studs to mount the wires to the fan, to prevent disconnecting while the launcher is fueled. Also, the fan will not be switched on or off while the thing is fueling.
You can use a brushed motor, and you can even use a high-voltage power source... you just also need to use common sense as well...
My friend is currently working on his launcher. Since a 6x15" chamber is rather large, he thought a normal fan couldn't do it.
He's now currently using the motor he ripped out of something-or-the-other with a 12v rechargeable battery. When you remove the leads from the battery, (which are, now, just alligator clips), you get some serious sparking. Well enough to ignite the mixture...
The important thing is to make sure you have a good connection. He's going to be using some hoop connectors with threaded studs to mount the wires to the fan, to prevent disconnecting while the launcher is fueled. Also, the fan will not be switched on or off while the thing is fueling.
You can use a brushed motor, and you can even use a high-voltage power source... you just also need to use common sense as well...