The last one I made I used straight glass tubes (industrial chemist supplies). I did experiment with bending them myself but it wasn't such a neat job. In the end it's easiest to use two straight glass tubes and a short length of PVC or Silicon tube to join their bottoms. That curves as nice as you like.
The glass is better than plastic tubing as the water doesn't seem to stick to it as much. Also from Ben's or other industrial suppliers you might be able to get a colouring agent for the water, which helps a lot to make the reading easier. It is specifically for water manometers and has an SG=1. Can be red or green. If you don't have the tubes mounted on a white background, run a white tape up behind the tube (what glider pilot wouldn't have rolls of white tape!) Regards SWK ----- Original Message ----- From: "Catherine Conway" <[EMAIL PROTECTED]> To: "Discussion of issues relating to Soaring in Australia." <aus-soaring@lists.internode.on.net> Sent: Wednesday, August 08, 2007 2:36 PM Subject: Re: [Aus-soaring] My round-tuit list > Thanks but I already have a wonderful calibrated scale that I bought > years ago. The rest is pretty easy with a few bits of Ply and a > jigsaw, and a large syringe etc. But sure, send me a pic of the > ready made one if you have one. > > -Cath > > > > On 08/08/2007, at 2:21 PM, Ben Jones wrote: > >> Cath, >> >> There is a easy way to make a manometer, >> >> They are available as a complete ready to use item, just add water, a >> company in Perth sells the for gasfitters and plumbers, >> There name is "ALL CONTROLS or A+L SALES". >> >>> From memory my 8kpa manometer was about $ 70.00 >> >> If you would like I could get a costing for you as they supply me >> many gas >> related items. >> >> Regards >> >> Ben >> >> >> >> ----- Original Message ----- >> From: "Catherine Conway" <[EMAIL PROTECTED]> >> To: "Aus-Soaring in Australia." <aus-soaring@lists.internode.on.net> >> Sent: Wednesday, August 08, 2007 10:54 AM >> Subject: [Aus-soaring] My round-tuit list >> >> >>> Hi guys >>> >>> Something thats been on my list for a while is to make myself a >>> manometer. Does anyone know where I can get the glass u-tube from? >>> >>> Thanks >>> >>> Cath >>> _______________________________________________ >>> Aus-soaring mailing list >>> Aus-soaring@lists.internode.on.net >>> To check or change subscription details, visit: >>> http://lists.internode.on.net/mailman/listinfo/aus-soaring >> _______________________________________________ >> Aus-soaring mailing list >> Aus-soaring@lists.internode.on.net >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring > _______________________________________________ > Aus-soaring mailing list > Aus-soaring@lists.internode.on.net > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring _______________________________________________ Aus-soaring mailing list Aus-soaring@lists.internode.on.net To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
