Can anyone identify this pipe? It was on a YS61 long stroke engine. I was under the impression it was a Hatori. Any ideas on make and model?

Thanks.

It looks like a Hatori 650, which is the pipe you would use on a 60/61.

Sam

Sam,

Thanks for the quick reply. I was thinking it might be a 650.


Thanks again.

A hatori 650 has three baffles and the baffle welds are visible from the outside. I don't think that is a 650. I have pipe on an Enya 60XL GP that looks a lot like that one. I think it was made by Enya. Is there one threaded hole for a pressure tap, maybe just stopped up with a screw? Shine a flashlight down through the inlet and see if it a coned baffle or a flat baffle. If it is a flat baffle pipe, then you can use the distance to the baffle to set up the pipe.

There is a plugged hole for a pressure tap on the diverging portion of the pipe. The baffle is flat with a single hole in the center. I have seen this same pipe on at least 2 other YS61 engines. It just would be nice to know what it is.

Thanks for the help.

That is the pressure tap I was looking for. I believe you have an Enya pipe. If so, it is a good quiet pipe when set up properly.

Thanks for the help. I didn't know Enya made such a pipe.

Thanks again.

The pipe in the picture seems to be an early Hatori 650. I still have one that I used with a YS 61. I bought it around 1990.
Visually my pipe is identical with the one in the picture, also having a outlet for pressure tap. The pipe is 430 mm long and has 40 mm diameter.

Current model (Hatori 650) looks a little different with a shorter rear cone.
http://www.hatori-models.co.jp/htdoc...mage/650c.html

ini

I have a never been used 650 still sitting in the original box at home. There isn't a weld mark anywhere on the outside of the pipe.

John

Well I hope I have not given misinformation. I had a pipe (second hand) that I bought as a "Hatori 650". It had three visible welds like a "Hanno" pipe only it was natural aluminum. It was my understanding that the "Hanno" pipe is a copy of the Hatori 650 with a longer inlet tube and red anodizing. The "Hanno" pipe definitely has visible external welds.

Is there a chance that the earlier Hatoris had no visible welds and the later pipes did?

Lems,
Looking at the link in "ini"'s post appears to show the reason for the confusion. Hatori changed the 650 to the version you have. The one I have is obviously an older model.

John

My reply was based on 2 Hatori 650's that I have and used when I flew pattern in the mid 1980's with a YS 60. It looks exactly like the pipe he pictured. I have a new Hatori 900 on a helicopter and it looks completely different with bumps around it. The YS61 was the engine that came out as a replacement for the YS60 - but still in the 80's. Most used the Hatori 650 on that engine as well.

Sam

I always ran the 601 (?) short chamber on my YS .60's.

John

John,

I was in our storage unit today and looked a the boxes that the Hatori pipes came in that I used on the YS 60's. They were the 650. The majority of us in So. Cal. used that engine and pipe combination at that time.

I thought that was the case - I just wanted to have my facts together before I replied.

Sam

Sam,
That's one of the things that's so great about this hobby. There's so many different ways to accomplish the same thing ... having fun! I know I said in my previous message that I always ran a 601 with my 60's, but the truth be known, I have a 650 on my RE 60 right now. They work great either way. The 601 just requires a longer header!

John