Turbo Clamp 653332

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Luigi

Line Up and Wait
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Jan 13, 2013
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Luigi
Anybody know where to find one?
This is for a Piper Turbo Arrow, Continental TSIO 360 FB
 
Luigi said:
This is for a Piper Turbo Arrow, Continental TSIO 360 FB
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I don't know about Piper specifically, but have seen several PMA clamps out there for turbo installs that are an alternate for the OEM part numbers. Perhaps look for an alternate?
 
You have a Rajay turbo. Rajay products have a PMA'ed clamp for a Rajay turbo, but the PMA is limited to STC installations. However, I have gotten a field approval for a Seneca II to use those. Should be the same turbo.
 
Kristin said:
You have a Rajay turbo. Rajay products have a PMA'ed clamp for a Rajay turbo, but the PMA is limited to STC installations. However, I have gotten a field approval for a Seneca II to use those. Should be the same turbo.
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yeah - just put two on my Mooney. Not inexpensive, but at least available.
 
It's not a Champ.

It's a Luscombe.Luscombe.jpg
 
Now it's September and still waiting. Shop said back ordered through February 2026!!!
WTF!!!
 
A1Topgun said:
Now it's September and still waiting. Shop said back ordered through February 2026!!!
WTF!!!
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Get from Rajay Turbo Products, p/n RJ-0193, and get a field approval to use them.
 
Kristin said:
Get from Rajay Turbo Products, p/n RJ-0193, and get a field approval to use them.
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Why would you need a field approval and not simply install the clamp as a minor alteration? The part itself has a design and production approval and is only missing the installation approval which seems to fall under a minor per existing guidance.
 
Bell206 said:
Why would you need a field approval and not simply install the clamp as a minor alteration? The part itself has a design and production approval and is only missing the installation approval which seems to fall under a minor per existing guidance.
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It is not an alteration at all. The issue is that the Rajay part is not PMA approved for your aircraft. It is approved for aircraft modified by Rajay STC's, which yours is not. If your plane qualifies as vintage, your IA might be willing to consider it is a "standard part" or otherwise acceptable under AC23-27.
 
Kristin said:
It is not an alteration at all.
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But that is exactly what you implied with the reference to a field approval. Hence my question why. As to labeling it a standard part, I think that would be a stretch unless the clamp was produced to an FAA or industry standard which I not aware of any.
 
Bell206 said:
But that is exactly what you implied with the reference to a field approval. Hence my question why. As to labeling it a standard part, I think that would be a stretch unless the clamp was produced to an FAA or industry standard which I not aware of any.
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But a field approval can approve the substitution of a part outside of its PMA limitations. At least, that is what we did on a Seneca II. Y'all do you!
 
Im exp and considering using one of the many auto applications, which are plentiful and inexpensive.
I could change them every annual and be safer than what the system is doing to non-exp aircraft right now.
 
NordicDave said:
Aviation V-band clamps have a different clamp slope. There is a mountain of difference in quality.
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I'd be interested to see the actual evidence for this assertion. Considering that there's only a few manufacturers of turbochargers in aviation, and those same turbos are frequently used (and sourced) from the automotive and truck parts bins, this would be surprising. Now, Summit Racing may or may not have chinesium parts and varying quality levels, but a brief search shows that riveted high quality clamps are easily available from a variety of sources at a fraction of the prices charged for 'blessed' clamps.

Indeed, there's an abundance of parts on Pipers, Cessnas, Beechcrafts, that were pulled directly out of an automotive parts bin, stamped with different numbers, and marked up to match aviation price expectations. I'd expect the same for a clamp....
 
Darryl Snover said:
I'd be interested to see the actual evidence for this assertion. Considering that there's only a few manufacturers of turbochargers in aviation, and those same turbos are frequently used (and sourced) from the automotive and truck parts bins, this would be surprising. Now, Summit Racing may or may not have chinesium parts and varying quality levels, but a brief search shows that riveted high quality clamps are easily available from a variety of sources at a fraction of the prices charged for 'blessed' clamps.

Indeed, there's an abundance of parts on Pipers, Cessnas, Beechcrafts, that were pulled directly out of an automotive parts bin, stamped with different numbers, and marked up to match aviation price expectations. I'd expect the same for a clamp....
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I work for an engine OEM and will say this. You’re dead wrong if you think one “v-band clamp” is the same as another. There are so many different styles that look the same but aren’t. I’ve seen the wrong clamp pounded on a flange with an impact more times than I can count. Yes it works. No I wouldn’t even consider it on an aircraft application. You’re asking for trouble there, especially when the clamps are causing enough concern that there are ADs on them.

A suitable clamp can likely be sourced outside of the aircraft parts supply chain. It’s going to take a lot more work than just ordering a clamp from Amazon or Summit and slapping it on however.
 
mondtster said:
I work for an engine OEM and will say this. You’re dead wrong if you think one “v-band clamp” is the same as another. There are so many different styles that look the same but aren’t. I’ve seen the wrong clamp pounded on a flange with an impact more times than I can count. Yes it works. No I wouldn’t even consider it on an aircraft application. You’re asking for trouble there, especially when the clamps are causing enough concern that there are ADs on them.

A suitable clamp can likely be sourced outside of the aircraft parts supply chain. It’s going to take a lot more work than just ordering a clamp from Amazon or Summit and slapping it on however.
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I never said 'one v-band clamp is the same as another' - but again, would like to see actual evidence that there's somehow something magical about these clamps compared to a quality 'non-aviation' part, let alone differences that would justify a price premium of $900....other than lawyers....

Recently replaced the clamps on my Mooney that has a Rajay turbo-normalizer kit. Held the magical clamps in my hand. The old clamps were well past their prime, and one of the old clamps had some actual part markings from Lockheed Martin on them, so presumably WAS made from Something Special. The other....probably replaced by hangar fairies sometime in the 1980's by a 'normal' V-Band clamp. Whatever. The new clamps are at least shiny, with the proper Rajay part numbers, serialized, and there's now actually gaskets in place, where before, there were not.
 
Darryl Snover said:
I never said 'one v-band clamp is the same as another' - but again, would like to see actual evidence that there's somehow something magical about these clamps compared to a quality 'non-aviation' part, let alone differences that would justify a price premium of $900....other than lawyers....

Recently replaced the clamps on my Mooney that has a Rajay turbo-normalizer kit. Held the magical clamps in my hand. The old clamps were well past their prime, and one of the old clamps had some actual part markings from Lockheed Martin on them, so presumably WAS made from Something Special. The other....probably replaced by hangar fairies sometime in the 1980's by a 'normal' V-Band clamp. Whatever. The new clamps are at least shiny, with the proper Rajay part numbers, serialized, and there's now actually gaskets in place, where before, there were not.
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The takeaway from my post should be that there are a ton of different variations of clamps that effectively look the same. If you know the profile of the flange you’re dealing with you can probably find something that would fit properly with enough work, But it might make that $900 clamp seem cheap if you value your time at all.

Who knows, maybe it is something super common. Or maybe not. I’ve had aircraft clamps on and off numerous times but never bothered to try and figure out if they were something special or not.
 
Darryl Snover said:
I'd expect the same for a clamp....
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FWIW: You'll find V-band clamps and couplings used in aviation must meet a specification like SAE, ASTM, or similar specification to start with. Then that clamp or coupling receives further approval during the aircraft or system design phase. So while its very possible that SAE spec'd V-band clamps are used in some racing applications, the document trail to use them on an aircraft is where you usually have the most problems.
 
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