Search found 856 matches

by milisavljevic
Thu Aug 06, 2009 10:30 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders! Welcome back. They are made with a 3.5mm bore and close to specs except for the inner [radii] ...some different angled cuts will have to do. If possible, please try to grind down (smooth out) the angles with a suitable hand tool (eg., a Dremel link ). I found that they were 6mm ID, no...
by milisavljevic
Fri Jul 31, 2009 3:09 pm
Forum: Off topic forum
Topic: WTF Mate! Vortex cannon!
Replies: 1
Views: 1286

Re: WTF Mate! Vortex cannon!

.
ZOMG!!! :o

M.
by milisavljevic
Fri Jul 31, 2009 3:00 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hej! I can easily change this to a tube with larger diameter...it is 8-10mm ID if not even larger. Anything in that diameter range will do nicely , mate. It would be great if the problem is so easily solved. And it sure will feel good when it starts up next time! :D "A pulsejet without an adequate f...
by milisavljevic
Fri Jul 31, 2009 2:19 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Anders,

Please confirm with GRIM, but I am pretty sure he modified his blower to feed both intakes simultaneously.
Without success. The ginormous flames, etc., are more a symptom of the restrictive fuel delivery system.

Cheers,
M.
by milisavljevic
Fri Jul 31, 2009 2:10 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders! The ID of the fuel lines is 5mm. Ummm...Okay. That is a bit on the too small side. After the "T" (ie., supply line splitter), as you move back towards the bottle , what is the supply line ID? Please do not tell me that it is also ID 5 mm. This is too small. Tim ("wakmat") had this exa...
by milisavljevic
Fri Jul 31, 2009 10:07 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

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Johansson wrote:Vielen dank!
Gern geschehen!

M.
by milisavljevic
Fri Jul 31, 2009 10:03 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hej! The reason why I didn´t want to run it on liquid propane now was to keep the vapour coil hot. If it will not start from vapour feed , then for sure the injector area is too small . I have seen this before. The starting behaviors you described match to undersized injectors...what is the ID of th...
by milisavljevic
Fri Jul 31, 2009 9:43 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders! I will build a pair of M´s superdeluxe injectors before the next test ... If you do not have a 3,5 mm drill bit, then I suggest that you start off with MFI injectors sized to ID 3 mm. You can always bore the channels out to ID 4 mm, provided the channel lengths are approx . 20 mm (5x ...
by milisavljevic
Fri Jul 31, 2009 2:55 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

One step at a time, please.

Hejsan Anders! What changed? I mean what has changed so much from the configuration of your previous successful runs? The engine started and ran out well enough before, and you have not altered the duct geometry since then. We need to identify what specific changes -- all of them -- that were made t...
by milisavljevic
Thu Jul 30, 2009 8:02 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders!
Johansson wrote:The next test run is tonight.
Good luck from Canada. Fingers crossed! :P

Cheers,
M.

PS: Please don't forget the camera. Video (read: audio) would be nice.
by milisavljevic
Wed Jul 29, 2009 3:47 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders! Making a rectangular slot measuring 0.78mm2 ...would prove more of a challenge than this entire project has been so far, so I think I'll pass. What? You don't have lasers (preferably strapped to sharks' heads) in Sweden? :lol: No worries. As I said, "Not a biggie." When is your next l...
by milisavljevic
Wed Jul 29, 2009 2:23 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hej! I did a flow test of the restrictor plate and got the following result: If you recall from earlier in the thread, I mentioned that (round ended) slots work better than (round) holes wrt. flow linearity . If it's not too difficult , why not cut out a slotted restrictor plate with an equivalent a...
by milisavljevic
Tue Jul 28, 2009 7:21 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders!
Johansson wrote:I got some more work done on the kick today.
Better and better! :D

Cheers,
M.

PS: You have a PM.
by milisavljevic
Sat Jul 18, 2009 8:31 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

Hejsan Anders! There are times when Eric does know what he's talking about, and the following is close enough to one of them: Johansson, If you can get some lexan, you should be able to make a very nice cowl for it, that can form around the kick and be quite aerodynamic, lexan bends very nicely and ...
by milisavljevic
Sat Jul 18, 2009 8:05 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 84871

Re: Calculating top speed on ice...

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tufty wrote:Hey m.
Hey Simon!

You have a PM. :D
.