We have created this site to introduce our metal work and help you with oxyacetylene welding questions and aircraft construction such as fuel tanks ,tubing work.  We have been in the instruction buisiness for several years starting the aircraft builders classed in the 90's connected with the Experimental Aircraft Association.  We continue to work the volunteer work shop areas at Sun N Fun and hold forums there.  we got into the instruction business while selling welding equipment.  Simply put the more you could show people they could do the more they valued the equipment.  This took off to giving forums at places like  Bartlesville OK BiPlane show  and Oshkosh Wi.at the EAA Convention.  We are not oriented to high speed production welding but rather the hobbyist who with a minium investment of money can take care of most of their needs.  Metal working like many  other activities is a continual learning experience.  Of course building your own airplane should never be done until  you have mastered some of the basic skills  Several years ago while at the Lumberton NC fly inn several FAA reperesentatives wanted me to look at an Experimental Airplane that was there.  I went with them and was greatly disappointed in the leval of welding which was apparent .  If it does not look good it is not.  The plane had been flying , but never should have been signed off.  If in doubt of your skills seek some advice  That is what organizations like the EAA are about.  That is one of the reasons for this site to hopefully help.  The science of welding has been around for a long time and all you have to do is look around to see the evidence.  In the defence of old techniques are the old airplanes falling apart  as they fly and land?  Several years ago I was asked my opinion at a Harris Calorific welding class of their welding tips.  I told them I was not impressed as they were to broad .  The instructor who was retired asked me If I had seen a certain tip they produced .  I had not and  was not aware it existed , he showed me and I bought one for my torch.  What a change, in our classes after showing most students they preferred this tip.  The design was such that it concentrated most of the flame in a narrow pattern.  The tip was machined to provide a funneling effect of the gases befor entering the orifice.  Upon exiting the gas was still in a tight pattern while burniiing.  This then produced a narrow heat pattern which would help eliminate much of the warping effects of a conventional tip.  Again during aluminum welding workshops at 2011 Sun N fun convention at Lakeland Fl. nobody has seen these type of tips.   Both Lincoln and Miller were present at the convention but none of there gas apparatus subsideries such as Harris and Smith.