We've seen plenty of 829Bs but this is my first view of an 828B. Looks like pre-War or possibly 1940s, at the latest...my guess. 300HK instead of 350CP. Surely not from Altena. Even has the early style preheater. I didn't know the 'B' for benzin types were that old.
Yes @Piotrek and @MYN I didn't know there was a petrol version of this Petromax series 1936-1939.I have now dismantled them.Experience has taught me not to completely disassemble this Rapid,as the very thin riser pipe can break off faster than you can look.Hopefully the pressure vessel is still usable and safe.
I have an old Petromax 828/300HK but it is in very bad shape and without both the original inner and outer hoods. I don't think I'd ever find the 828B in my location.
Congratulations Reinhard, A pretty Pétromax 828 B lantern that I have never seen and it is very pleasant to discover this one. The older the devices, the more fragile they are. It is important to take actions carefully. I wish you could find the upper cap on a wreck. Regards, Titoo.
I have now cleaned the small parts.The riser pipe of the Rapid was clogged at the narrowrst point.The tank scratch is 11 8 = November 1938.The pressure vessel has numerous cracks. I will solder it all around.The only difference from the kerosene version is the straight carburettor, it is marked Petromax.
Today I pre-assembled the add-on components . @Titoo I knew that I still have a hood cap in the basement that matches this model.It's really not nice but it's original.That was the last deciding factor that I bought the Petromax.
Thank's @JEFF JOHNSON The soldering work is finished. Water bucket test successfully passed. The pressure vessel is tight. The Rapid works well with kerosene. Now I 'm doing another pressure test with kerosene in the pressure vessel. Next week when the weather is better we'll go outdoor . With petrol. @MYN In 1940 there was also another 828 B .I have already presented it here.In 1953 there was also an 828 E for petrol operation. @Titoo has such 828 E with straight carburettor.
Thanks @Reinhard All these early ones with the straight vaporizers aren't that common. Is it possible that they had used alcohol or petrol instead of the usual kerosene during those years? I've read there was some restrictions or shortages of the usual fuel during the War years.
We can imagine any thing but fact is that the quality of gasoline of today is not the same as gasoline of the 1930ties. Which also would include kerosene. And besides that, there always would be companies like the military, railways who want to use only one kind of fuel. They would weigh the risk's if there would be any.
Once after I had pressure tested a Tilley tank in water and it appeared to be tight, I then put paraffin in it and pumped in pressure and left the tank in the shed overnight and when I checked it the next day there was a small leak from a very small stress crack in the tank near to the rim, so paraffin in a tank under pressure found a leak which air did not, but it's possible that the stress crack only happened that night, a small amount of fuel was on my workbench, so if I was going to use that test again then I would place the tank in a basin or some other container. PS., if I recall correctly that Tilley was a WW2., TL-10 and I have had several Tilleys from that era which have developed stress cracks. Reinhard
On such old lanterns, especially also when there had already been some soldering and repairs done by previous owners on the founts, it is certainly a very good idea to test them using kerosene first . Of course, it is a wise move on any lantern that is inherently designed for working with kerosene. You want to be 100% confident before you introduce petrol or any Coleman Fuel type naphthas to it.
@Reinhard How thick are the lead washers that go between the control blocks and the fount for the rapid preheater and the fuel block (part 153 “lower vapouriser part)? Thank you in advance. Tony
The pressure vessel is filled with 1 Liter kerosene and has been under pressure at 3 bar since Saturday afternoon.It is dry on the bottom and top and sides.It lost 0,00 bar during this time. @Tony Press The lead washers measure 2×10×21 mm
Nice work, @Reinhard. A question about fettling one an old of these lanterns. Do you make your own Viton (rubber) washer for the bottom vapouriser valve? That is the one with the brass cup and central brass fitting to accommodate the pointed end of the brass rod? 1938 fitting on right; modern replacement on left. Cheers Tony
