Just bought a cheap little sintered bronze filter with a 1/4" fitting that seems to be designed to give just the right 'fffffftttt' in those turbo ricers that bogans driveHad an aircraft that had a cintered brass filter in a short static port tube behind the dash. Worked fine.
The sintered bronze thingys are mufflers for pneumatic valves. They seem to start at 1/4 BSPT. One could probably get an adaptor,, but all you need really is a plastic bung with a very small hole in it.Just bought a cheap little sintered bronze filter with a 1/4" fitting that seems to be designed to give just the right 'fffffftttt' in those turbo ricers that bogans drive
Normally the instrument fittings are 1/8 but 1/4 bspt is the size nitto air fittings are, not 1/4" actual dimension.Nuts, are you saying that is bigger than the 1/4" that my ruler says? I was goi g to get a sintered filter for an RC Cl no tank but they are 3.5mm and u couldn't be arsed making it fit . Maybe I'll just cable tie a piece of stocking over the tube...
When I was learning to fly back in the early eighties, my instructor (upon arriving in the circuit) covered the panel and said "You can fly the circuit on sound and attitude". He kept saying that if I kept the horizon in the correct place on the wind-screen and the throttle about right then speed and descent would follow. If I kept the runway in the right place then I'd land okay. He was right but boy oh boy, I don't think I could do it these days. He could see the instruments and did mention that I was faster than normal until crossing the fence then got a bit slow.Worth a try in my opinion. There is a standard glider training session where the student has to fly with the altimeter and the asi covered up. Most students flew a bit faster than normal and maybe started the circuit a bit higher. You are contemplating much less than having no altimeter at all. This check was done because a glider may land at a place with unknown elevation.
I dunno the argument behind the asi covering. But I reckon a good pilot shouldn't need an asi.
You could investigate in the air if the indicated altitude varied with speed or not. It would with a fast and slippery plane.