The DF is boiling 500mls of water in 5:00 minutes... The Primus Omnilite Ti does this is 2:30 minutes... This is just an off the cuff comparison of two of my stoves...the DF seems to be low in iron and feeling fatigued and looks rather pale. The flame seriously, does look normal and adequate and clean with no pulsing. I've checked both filters and done the blow test on them and there seems no impediments to the fuel flow. I put the jet and pin in my ultrasonic bath for 25 minutes too. I have cleaned it but yes it will be cleaned again shortly just to be sure. I would put money on the jet having an issue but it is the DG jet and it appears normal in every way. It is running on Shellite. Any thoughts
20 more pumps then another 20. Elon uses dragonfly burners in his rocket design. Mine left burn marks on the inside of the pot under a litre of water which boiled in a tad under 3 minutes
I think you are right...it just seems to take a lot of pressure to get the most out of it. I pumped it up a lot more and got the boil time down to 3:42 which is still nowhere near the boil time of the Omnilite Ti. The DF works fine but the Omnilite just feels and sounds more powerful using the correct jets for each and the same fuel.
The dragonfly has a larger distance between the the burner and the pot base. Because of this it needs the wind guard for good performance.
@InspectorGadget What is the difference in burner height to pot base of each stove? I suspect the distance is greater on the DF to reduce carbon monoxide. Both stoves have their pros and cons and were designed for different purposes.
It certainly does but I always use a wind guard. It is a hard question though as to what is normal really for the DF...it would be nice to compare it with others. I really can't find anything wrong with it. The Omnilite Ti objectively puts out more energy...quite a bit more. It sounds and looks like it does too. It is much noisier than even the DF. Assuming everything is right with both burners...the jet is really the only difference given the simple nature of these stoves and perhaps pressure as someone pointed out. The orifice is .32mm on the Omnilite but not sure what it is on the DF.
My DF and XGK II performes pretty much the same. To cut down on boiling times pumping is required. A XGK II/DF has around 3cm of clearance between the burner bell and topp of the pot supports, a omnifuel II has around 2cm. The extra hight makes a DF and XGK II friendly when it comes to carbon monoxid. The extra hight also makes them a bit slower than a omnifuel II. Messurements done by a proffesinale outdoorsman in norway says the DF/XGk II produces around 12-20 ppm while a omnifuel II around 50ppm of carbon monoxid. All 3 tested with a flat bottom pot with no heat exxhanger.
There are quite a few posts here about the decision, made by MSR, to raise the pot stand of the XG-K. Lower CO, Raise boil times. Since these stoves were used in tents the choice seemed obvious.
I just don't see the DF producing as much power as the Omnilite, the difference is obvious and I don't think the height above the burner makes much difference as I use a big whistle kettle which captures the heat well. It is just pressure producing flow which depends on the size of the jet. The Primus Omnilite has the jet size printed on the jet and it is .32mm for white gas/shellite. Does anyone know the size of the DF jet?
