Search found 16 matches

by jamjarjim
Sun Sep 21, 2014 9:47 am
Forum: Valveless pulsejet forum
Topic: Jam jar jet fuel system
Replies: 8
Views: 3719

Re: Jam jar jet fuel system

What kind of one way valve would you use?

Jim.
by jamjarjim
Fri Sep 05, 2014 10:19 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

These are some photo's of the jar lids i've been using
2014-09-05 09.07.25.jpg
2014-09-05 09.07.40.jpg
These first two show the lid of the standard jamjar
2014-09-05 09.08.31.jpg
2014-09-05 09.08.15.jpg
The second two show the lid from the Glass Thermo-jet.
by jamjarjim
Fri Sep 05, 2014 10:15 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

For comparison this vid is the same jar type, but run as a normal jamjar with just a single 11mm hole in the lid. The jar broke about half a second after the video finishes.
by jamjarjim
Fri Sep 05, 2014 10:05 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

This one shows how the flame 'Dances ' in shaft like shape directly below the intake ports.
by jamjarjim
Fri Sep 05, 2014 10:03 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

Nightime view of the glass Therm-jam. Note the shape of the flame.
by jamjarjim
Fri Sep 05, 2014 10:01 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

This is my glass Thermo-jam. Daytime vid so you can see the setup. It was also one of the longest runs ive had yet.
by jamjarjim
Fri Sep 05, 2014 9:59 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

Thermo-jam with different lengths of pipe. The lengths are given in millimeters in the filename of each vid.
450mm.mp4
450mm
(1.89 MiB) Downloaded 191 times
680mm.mp4
680mm
(1.89 MiB) Downloaded 185 times
880mm.mp4
Longest 880mm
(1.85 MiB) Downloaded 174 times
150mm.mp4
Shortest 150mm
(1.91 MiB) Downloaded 174 times
As you can see, there is not much difference between how they run.
by jamjarjim
Fri Sep 05, 2014 9:54 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

Here's some video for you guys!!!
by jamjarjim
Wed Sep 03, 2014 4:29 pm
Forum: Valveless pulsejet forum
Topic: Tin Can jets
Replies: 41
Views: 17734

Re: Tin Can jets

The two jars in the lower photo run like grease. They are standard 7/16th or 11mm holes in the lids, they have good compression. The top photo of the Jetzilla type jar didn't do anything notable except burnsome fuel. It clearly has little chance of containing much pressure given all those holes!!!! ...
by jamjarjim
Thu Aug 28, 2014 10:10 am
Forum: Valveless pulsejet forum
Topic: Tin Can jets
Replies: 41
Views: 17734

Re: Tin Can jets

Thanks Mike. I had wondered if it was a typo. The jar i used to test the design was 14oz. I've attached a photo of two of my usual Jam jars, the one on the left is 16oz, the one on the right is 14oz. The other photo shows how i adapted the 14oz jar to be like the jetzilla article design. Regards, Jim.
by jamjarjim
Tue Aug 26, 2014 3:29 pm
Forum: Valveless pulsejet forum
Topic: Tin Can jets
Replies: 41
Views: 17734

Re: Tin Can jets

j.m. - Welcome! Keep in mind that even a "perfect" augmentor (whatever that might be) is only going to improve thrust by some reasonable fraction. A straight tube is not going to do as well as something with an inlet flare. Please look for the augmentor paper by Bruno Ogorelec, in the FAQ section a...
by jamjarjim
Tue Aug 19, 2014 9:04 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

Just a quick metal jamjar video :D

Not the longest run, but quite energetic!!!
by jamjarjim
Thu Aug 14, 2014 10:08 pm
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Re: Another Thermo Jam

Thanks Fedde, I will see what I can do :)
by jamjarjim
Tue Aug 12, 2014 11:15 am
Forum: Valveless pulsejet forum
Topic: Another Thermo Jam
Replies: 11
Views: 4228

Another Thermo Jam

Hi Folks,

I am trying to post a video of my Thermo-Jam. Will the forum allow attachments in .mp4 format????

Has anyone else made one of these fantastic little engines?

All credit to Ghrey for sharing his work with us, Thanks man 8)

Regards, Jim
by jamjarjim
Tue Aug 12, 2014 10:58 am
Forum: Valveless pulsejet forum
Topic: Jam jar jet fuel system
Replies: 8
Views: 3719

Re: Jam jar jet fuel system

Have you seen this??

http://www.youtube.com/watch?v=8krnOeql ... detailpage

Theres not much info with the videos. Is Kevin Lee a memeber of this form????

Regards, Jim