Replies to This Discussion

Permalink Reply by Greg Fletcher on April 10, 2012 at 8:15pm

You are right, that shouldn't be. Wiggle the tubes, is there an insufficient solder joint maybe? The pitot tube goes strait thu. The static is the 4 holes on the outside. Or maybe they drilled to far and hit the inner tube. Should be drilled before assembling.

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Permalink Reply by Leo Hogg on November 9, 2012 at 3:00am

I received my airspeed sensor a few days ago and I had this same problem. There defiantly should not be any air path between the pitot and static lines.

I took the thing apart by warming the epoxy at the end with a paint stripper to see what the problem was.

 

 

 

The long internal pitot tube is pushed inside the end cap with no attempt to seal it and it is a very sloppy fit.

 

 

I simply sealed it up with epoxy in assembled again. Its a bit fiddly as the small static tube is very short and its difficult to keep its internal free of epoxy.

 

 

I either had one that was not assembled properly or, more likely, they are all made this way. Surely everyone would do a blow test before installation?

  

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DeveloperPermalink Reply by Kevin Hester on March 12, 2013 at 7:50pm

Thank you for this post.  I used your recipe and fixed my 3dr airspeed probe this evening...

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Permalink Reply by Calle on December 20, 2012 at 5:23am

Nice tutorial!

I received mine 3 weeks ago, same problem as you and then a new replacement 1 week ago and guess what - same problem! None of the pitot tubes cant really work well without this mod right?

Im doing the same this weekend.

Thanks,

Carl

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Permalink Reply by Vince Hogg on December 30, 2012 at 2:35pm

I informed the shop where I got it and he said he would ‘get back to the manufactures’. Its no surprise they are still not right.

It certainly would not be as accurate as it could be it has a leak.

 

Vince

 

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Permalink Reply by Calle on December 30, 2012 at 2:51pm

The two pitot tubes I have had the same problem as described in this thread. Heat gun and epoxy solved it. I wonder how many people have had strange problems with their APMs without realizing that the pitot tube is faulty..

/Carl

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Permalink Reply by Jochen Tuchbreiter on January 5, 2013 at 2:04pm

Same here - thank you for the heads up, Otherwise I would not have noted this defect

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Permalink Reply by Tom in ON on January 12, 2013 at 11:12pm

I also have the same crossflow leaky pitot tube problem and this is Jan 2013!!!  Hello 3DR Robotics/DIY Drones Store, I just bought this two weeks ago and this problem first surfaced in April 2012. Inexusable!

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Permalink Reply by Calle on January 13, 2013 at 8:35am

I received a third one just now and suprise - it has the same problem as the other two. The only and best fix is to epoxy it.

Chris?

/Carl

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Permalink Reply by Chris Card on January 13, 2013 at 8:58am

I have another fresh (spare) pitot tube, but I haven't inspected it yet.

The steps + photos posted by Leo Hogg seems to be the best way to go, be careful not to use too much glue.

I used the JB Weld epoxy for my pitot tube repair.

I must say that I'm quite surprised that this is an on going problem.

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Permalink Reply by Vince Hogg on January 13, 2013 at 9:50am

Id bet £50 that every one has this problem.

Vince (Leos dad)

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Permalink Reply by Chris Card on January 13, 2013 at 10:18am

Vince: I think your money is safe.

I just checked my 2 brand new never touched, (until just now), combined pitot tube spares, and...

They leak!  in fact one is so bad that I thought that I had tube ends mixed up!

If this is to be the way they are shipped assembled, then it's a fail.

They should just ship the combined pitot as a kit since we'all have to take them apart & build them again.

I think that I will post in the  Tech support forum.

The question on my mind, now, is :  Does anyone have one of these that doesn't leak?

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