Brian Scranton Posted April 14, 2018 Report Share Posted April 14, 2018 So, I just had my IFR inspection (pitot/static) and my avionics guys was like, "Hey dude, your pitot system was leaking like a sieve." My IAS was always a head scratcher. In cruise, at 12K-15K, I would never see 120IAS. Ever. So, he patches the leaks and I'm seeing 130KIAS. Which of course completely changes all the TAS calculations I've been doing. Turns out, all you guys that were questioning my shitty speeds, aka, "You seem to be going really slowly for a TN M20F..." were all spot on. Thanks Mooneyspace. 3 Quote Link to comment Share on other sites More sharing options...
jlunseth Posted April 14, 2018 Report Share Posted April 14, 2018 Well, wait until you find the switch for the flux capacitor, then see what happens. You will have to be really nice to the guys on here who know where that is, it just takes awhile for them to get to know you and trust you enough. 1 Quote Link to comment Share on other sites More sharing options...
Bartman Posted April 14, 2018 Report Share Posted April 14, 2018 Glad you got that fixed. I had the same issue and was told they fixed leaks. My airspeed improved too, but I have not had a chance to check it at altitude. 1 Quote Link to comment Share on other sites More sharing options...
Guitarmaster Posted April 14, 2018 Report Share Posted April 14, 2018 Install LED Nav lights and you will pick up 8 knots! Sent from my XT1585 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
Mooneymite Posted April 14, 2018 Report Share Posted April 14, 2018 I get a terrific boost in speed when I remember to raise the gear and flaps! 5 Quote Link to comment Share on other sites More sharing options...
Guest Posted April 14, 2018 Report Share Posted April 14, 2018 You can do you own pitot leak check with a few feet of 1/4” surgical rubber tubing, some 3/4” electrical tape and a clothes pin. Roll the tubing on to the pitot tube, tape over the small drain hole on the bottom of the pitot tube, clip the clothes pin on to the end of the surgical tube. Slowly roll the tubing around the clothes pin while an assistant watches the ASI, stop at 100-125 KTS. Observe a steady indication, dropping IAS is a leak, find and repair as required. Roll and un roll slowly to avoid damage. Old Cessna manuals suggest using a pressure bulb from a blood pressure tester. Clarence Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted April 15, 2018 Report Share Posted April 15, 2018 Omg! I didn’t think of that! i just got my ifr cert and it failed! It was leaking and In fact they replaced my ias instrument. So I was buggered but hey maybe I’ll be going “faster” when I pick her up? I hadn’t thought of that. 1 Quote Link to comment Share on other sites More sharing options...
Guest Posted April 15, 2018 Report Share Posted April 15, 2018 This is also how your maintainer should be checking your airspeed safety switch during gear retraction checks, as well as using the red over ride button. Clarence Quote Link to comment Share on other sites More sharing options...
MBDiagMan Posted April 15, 2018 Report Share Posted April 15, 2018 On 4/14/2018 at 12:04 PM, jlunseth said: Well, wait until you find the switch for the flux capacitor, then see what happens. You will have to be really nice to the guys on here who know where that is, it just takes awhile for them to get to know you and trust you enough. I’m not telling!:) Quote Link to comment Share on other sites More sharing options...
wcb Posted April 15, 2018 Report Share Posted April 15, 2018 (edited) What year is your F (I assume the RayJay TN? I am routinely at 140ish KIAS in my F. I just had my G5's installed they also do a pitot static test (fixed a couple minor issues that really did not seem to impact my IAS) and last week's test flights at 70% hp at 3k was around 145 KIAS. I will be flying more this week to get more numbers and hopefully in a weeks to get to better altitudes to really see the results. Also, what setting are you running at those altitudes (%hp, LOP/ ROP, MP etc) Edited April 15, 2018 by wcb Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.