The International Cessna 170 Association

I had my instruments rebuilt by Otto Instruments, Ontario, California. These folks have been around since the 1960's and they are very reliable about workmanship and warrantee.

Good-luck!

Flight
1948 C170
N4236V
#18592

I had promised all of you a posting of the results to my airspeed problem. The Phantomfixer's post gave me the answer. We did as Cessna suggested in the letter to the Dealerships and removed the static line from the ASI only. With the higher q pressure from the cabin, the airspeed indication is now ...

You fellows have given me a lot of insight. We will check the seal again at the skin of the static port. It may be, that when we checked it, we were not careful enough. Also, what I find interesting, is what the Phantomphixer said. I read the information from Cessna on the 140. My 1948 170 as we all...

Kelly, I agree with what you are saying; we first thought the problem was with the static system, or static port-and it still may be. We checked for leakage around the port itself and the plate inside the fuselage. On the rag-wing, the port is located just forward of the left door frame. We are expl...

Thanks guys for the suggestions. Unfortunately, I have done all of the above except fly along side another airplane to compare IAS. I have adjusted the pitot tube angle upwards and downwards. The result of our final "tweaking" of the pitot tube has now brought the spread to 10 MPH lower th...

I am having a problem with my 1948 rag-wing. I have replaced the pitot tube, pitot lines, static lines, and had the ASI rebuilt. The ASI calibration was within one mph at all speeds according to Otto Instruments, in Ontario, California. After three leak checks there was no error in either system, an...