Ian Bagshaw Posted April 27, 2017 Share Posted April 27, 2017 Does anybody know where I can get a tuned pipe in the UK, I have tried just engines but they no longer have any stock. I have been told a Hatori 700 would work but can't find a supplier. Weston uk have some but they are un-baffled which wouldn't work at my club. The original plane had an OS red tuned pipe & a Hanno special, the restored version has an OS75AX. Many thanks Ian Quote Link to comment Share on other sites More sharing options...
Ultymate Posted April 27, 2017 Share Posted April 27, 2017 Try Weston UK **LINK** Quote Link to comment Share on other sites More sharing options...
Nigel R Posted April 27, 2017 Share Posted April 27, 2017 Have you spoken to Weston? Their pipes are baffled as far as I know. Even if not, you could always use an add-on can. Or, a Novarossi 50400, if you fancy getting it posted from the states. Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted April 27, 2017 Share Posted April 27, 2017 Ian, I have been through the hoop with tuned pipes so I can sympathise with you. In the end as I wanted a Hatori product I ordered it from the USA from GravesRC. I am not sure what they have now. However, there is a Hatori outlet in the USA too. **LINK** The tuned pipes are at the bottom that are compatible with OS. Buying from the USA direct is quite painless and I have found it easy enough to do it. Quote Link to comment Share on other sites More sharing options...
Ian Bagshaw Posted April 27, 2017 Author Share Posted April 27, 2017 Thanks, I spoke to Weston their pipes aren't baffled which as we have a 82db limit wouldn't work. I will look at the states. Many Thanks Ian Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted April 27, 2017 Share Posted April 27, 2017 Your 75 with standard silencer Ian would be more powerful than anything on that model from the past . Quote Link to comment Share on other sites More sharing options...
Martyn K Posted April 27, 2017 Share Posted April 27, 2017 I have a few pipes that I may not use. They are not pristine by any stretch of the imagination. Have you measured the exhaust timing on the engine? A pipe may not actually bring any real benefit if it has a 'sport' timing which is typical on the AX range. PM me if you want to try one but I suspect it may not bring any benefit but ad a lot of grief Martyn Quote Link to comment Share on other sites More sharing options...
brian ball 1 Posted April 27, 2017 Share Posted April 27, 2017 Ian l have a Hatori pipe New in box 90/120 with all fittings any good? Quote Link to comment Share on other sites More sharing options...
Ian Bagshaw Posted April 27, 2017 Author Share Posted April 27, 2017 Hi Brian I messaged you but not totally sure how that works on this site, is the pipe a #900? Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted April 27, 2017 Share Posted April 27, 2017 I don't think 'baffled' is the right term when talking about pipes. Quiet pipes have a chamber surrounding or following the resonant cone, which is not really a baffle. Ask JE or Weston UK for a 'quiet' pipe! A Weston UK Genesis pipe and a prop setup for torque rather than revs should get you down around 80dBa. Quote Link to comment Share on other sites More sharing options...
Tim Flyer Posted April 27, 2017 Share Posted April 27, 2017 Weston pipes are not noisy . I use them in both my sports boat and plane. But I'm afraid I do not have the DB readings. Their genesis pipes are the disk type (use a hollowed out flat disc at rear cone )rather than the more peaky double cone type so are a "throttle pipe" they do have noise reducing baffles at the end and work well and are not too critical. Speak to Weston they can help. Quote Link to comment Share on other sites More sharing options...
Tim Flyer Posted April 27, 2017 Share Posted April 27, 2017 I use the pipe on my OS 55 AX and it does give it quite a few extra RPM. I would guess it still adds approx 10-20% more power. I will do a tachometer test at some stage 😊 Quote Link to comment Share on other sites More sharing options...
Nigel R Posted April 28, 2017 Share Posted April 28, 2017 "I don't think 'baffled' is the right term when talking about pipes. Quiet pipes have a chamber surrounding or following the resonant cone, which is not really a baffle." The JE pipes are a clone of the Hatori design - a single cone, followed by a parallel section, followed by a flat disc (baffle) - all followed up by several different size silencer chambers separated by baffles. Quote Link to comment Share on other sites More sharing options...
Ian Bagshaw Posted April 28, 2017 Author Share Posted April 28, 2017 The JE pipes would be ideal sadly I spoke to them and the people that manufacture them are no longer producing at the moment. Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted April 28, 2017 Share Posted April 28, 2017 Posted by Nigel R on 28/04/2017 09:07:10: "I don't think 'baffled' is the right term when talking about pipes. Quiet pipes have a chamber surrounding or following the resonant cone, which is not really a baffle." The JE pipes are a clone of the Hatori design - a single cone, followed by a parallel section, followed by a flat disc (baffle) - all followed up by several different size silencer chambers separated by baffles. I'm almost tempted to cut my old pipe open to have a look at that! I must admit I thought the only baffle was the concentric outlet design, based purely on the external appearance. Quote Link to comment Share on other sites More sharing options...
Nigel R Posted April 28, 2017 Share Posted April 28, 2017 No more JE pipes then I have the Novarossi I mentioned, this is also a baffled type, it is quite nice but not generally available here. May be worth contacting the UK agents to see if they could get one in. Planet Hobby in the states sell them and will do overseas post. Quote Link to comment Share on other sites More sharing options...
Tim Flyer Posted April 28, 2017 Share Posted April 28, 2017 if you are really interested in tuned pipe theory etc I suggest you visit Prestwich Models website. Yes it is a BOAT website but boaters always run pipes on two strokes so have much more experience. Dave Marles who runs the site has lots and lots of free tech info plus a link to the "two stroke tuners handbook ". He is a World champion boat guy. Quote Link to comment Share on other sites More sharing options...
Ian Bagshaw Posted April 28, 2017 Author Share Posted April 28, 2017 Thanks for all the help I have family in the USA who are going to send me a Navarossi for $39 even though its made in Italy I'll probably crash the plane first time out now! Ian 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.
Note: Your post will require moderator approval before it will be visible.