VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 08-24-2019, 12:29 PM
mcems mcems is offline
 
Join Date: Apr 2008
Location: Salem SD
Posts: 171
Default FF 1201 cracked/Pitot tube lose

This is just a heads up guys to check for this.

My FF 1201 (plastic block holding pitot tube in place mounted on the back of the gearbox)) was full of cracks that look to be simple deterioration from 10 years and 1000 hours of use.

It would not hold the pitot tube in place any more. I just machined a new one from aluminum instead of plastic . I used the old one for a pattern and made it exactly the same.

I think this would only apply to the older higher time RV 12s

Brad Stiefvater
Salem SD
124bj first costumer built RV 12 to be airworthied and fly
maiden flight 9-20-2009
Reply With Quote
  #2  
Old 08-24-2019, 01:17 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,559
Default

Mine split down the middle along the screw thread. I replaced it earlier this year at approx 400TT. I think it was over-torqued. Replaced with same P/N plastic from Van's.
__________________
-
Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 750

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
Reply With Quote
  #3  
Old 08-24-2019, 03:01 PM
bobg56 bobg56 is offline
 
Join Date: Nov 2018
Location: Peachtree City, GA
Posts: 203
Default

Did this cause any leaks to the pitot system? I think I have a pitot leak, my IAS seems to be 10kts low, I have a standby ASI and it is also low...my RV12 is a 2010 with about 280 hours...I will have to take a look at this.
Reply With Quote
  #4  
Old 08-24-2019, 04:24 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,559
Default

In my case no leaks. Split plastic holder allowed the pitot tube to rotate. I investigated when I was slipping pitot cover on and noticed the pitot tube had rotated 90 degrees.
__________________
-
Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 750

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
Reply With Quote
  #5  
Old 08-25-2019, 10:08 AM
bobg56 bobg56 is offline
 
Join Date: Nov 2018
Location: Peachtree City, GA
Posts: 203
Default

I did not build this aircraft and don't have the plans, is it difficult to remove and replace the block if its broken?
Reply With Quote
  #6  
Old 08-25-2019, 10:20 AM
mcems mcems is offline
 
Join Date: Apr 2008
Location: Salem SD
Posts: 171
Default

Very easy. Just unscrew pitot(after removing the tube to the ASI) from the block and remove 2 bolts holding block and replace . Then just screw the pitot back in and tighten set screw.

Brad
Reply With Quote
  #7  
Old 08-25-2019, 11:23 AM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,559
Default

Here is construction drawing for pitot installation...

__________________
-
Jim Stricker - EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 750

LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father - CFI) - USAAF 1st Lt. Captain B-17H
Reply With Quote
  #8  
Old 08-27-2019, 05:48 AM
bobg56 bobg56 is offline
 
Join Date: Nov 2018
Location: Peachtree City, GA
Posts: 203
Default

Thanks Jim! This will help a lot...
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 12:28 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.