Hanlon-Wilson Mufflers

[Nathan K. Hammond]

Wag-Aero wants $2000 for a complete set of Hanlon-Wilson's, and I say the hell with that. Maybe when my sh_t turns purple and smells like rainbow sherbet! So in a moment of inspiration, I called up Dawly Exhaust and told them my plight, and asked if it was possible for them to make me a set under FAR 121. (Owner/operator produced parts). And the big answer...YES! But, (:? I'm thinking "well damn") as my part in this owner/operator produced part, I must supply them with either a complete exhaust or drawings. You know, if I had an old set I really wouldn't need a new one, duh

So does anyone out there happen to have an exhaust lying around that I could borrow? I promise to return it in the same shape or better.

I thought about looking for the drawings but my only ideas have been shot down. Since the exhaust is still under manufacture, the government (patent office, library of congress, Smithsonian) won't be to incline to release drawings. And asking Wag for them would be a joke, not to mention piss them off. My only chance is if one of you guys has a set of drawings.

If anything comes to mind, or you've got some suggestions, let’s hear them or shoot me an e-mail.

nkh

[MikeB]

Nathan,
If it was me, I'd go with a Cessna 150 exhaust. There should be dozens of them laying around or at someplace like Wentworth that are useable or repairable rather than building a whole new exhaust system from scratch.
Other than the exhaust outlet issue (not insurmountable) they are a perfect fit and there's enough that have been converted so getting a 337 shouldn't be a problem.

I understand where you're coming from, though.

Good luck.......!!!
Mike

[Ron Babos]

Nathan: Sounds like you're having a bad day? I know how you feel. Ron

[Brian]

I have a couple of sets of the H.W. mufflers sitting around on the shelf you could use, but I have to agree with guy who suggested the Cessna 150 type. He makes a lot of sense - they are available, 337-able and probably a lot cheaper than manufacturing your own. Trouble is, after you go through all the time and expense to build up a new set, it is not for certain that the FAA will sign off on them easily. If you want these as a pattern, call me at 330-483-3278, but I really feel you would be better off with the C150 route unless you can find someone willing to sell some used H.W. mufflers.

[Nathan K. Hammond]

I'm gonna call Dawly back and see if they really need ALL of the exhaust and how much it's going to cost. At the same time, my neighbor has a Champ with the O-200 and a C150 exhaust. Hopefully I can swing over and talk with him and look at his setup.

What Is the difference in the H/W and 150 exhaust anyway? Are there any alterations you have to do?

Brian thanks for the offer, I may be in touch with you soon.

nkh

[MikeB]

The big difference between the HW and the C150 exhaust is the outlet. With the HW exhaust system, the exhaust goes out the normal holes in the bottom of the cowl with no trouble (same as the Y pipe). If you use the C150 exhaust, you either need to make new holes in the lower cowl (and patch the old holes) or modify the C150 tail pipes slightly to fit the orginal holes or make a new lower cowl and put the holes where the C150 tail pipes exit. The C150 tail pipe exits at the center of the muffler and, I believe, the HW tail pipe goes out toward the front of the muffler.

I have a friend who is in the process of rebuilding a L-16 with a 85-12 and his plane has a 337 to install a piper exhaust system (J-3????). Kind of cobbled but is legal, apparently, as there is a 337.

Hope this helps......Mike.

[Nathan K. Hammond]

Thanks Mike. I sneeked over to my neighbor's and looked at his system, and see what your talking about. And it wouldn't hurt to make a new lower cowl for my ship, as it's pretty beat up.

I talked with Dawley again today about prices and what not. These are the prices he quoted to build up brand new systems. Understand that you either need to supply an old junk set that they "rebuild", a set for patterns, or drawings for a certified airplane.

Hanlon/Wilson (with clamp on risers)
- Muffler $279 X2 (I'm assuming that includes the shrowd)
- Risers $84 X4
- Clamps $20 X6
- TailPipe $84 X2

= $1182

*If you go with welded on risers, it knocks it down to $1138

C150
- Mufler $249 X2
- Curved Riser $64 X1
- Straight Riser $54 X3
- Tail Pipe $54 X2
- Clamps $20 X6

= $952

Big difference is cost. And when I think about it, every exhaust shop knows what a 150 system looks like. I think I'll take everyones advise and go Cessna. Thanks for all the help.

nkh

[pablo]

I found at Home Depot a package of 100 ear plugs for $6.00. Works great in my non muffler 7AC. Only disadvantage is slightly warmer left little toe when I use the "heater", while the rest of the body freezes.
Pablo

[Joepre]

Is there a 337 for installing the C-150 exhaust on a C-85-12? If so, does anyone know where to get a copy?
Joe

[Nathan K. Hammond]

Thanks for the tip pablo, but I don't think the FAA would accept that in place of the muflers. Still have to keep it true to the Service Letter and/or STC. As for the 337, there is a back side to one on www.aeronca.com but it doesn't have the front half of the form, the side with the aircraft details. oh well. If you do come across one, I would be really keen on taking a look at it.

nkh

[Guest]

There is a HW exhaust on ebay right now for anyone who is interested...saw it tonight...

[mike newall]

Just had a set of mufflers made by a chap in Florida, name of Sonny Poarch , phone number 239-340-3248. They are stainless, a copy of the H/W and they fit. Outlets are almost identical to the Y pipe exits and needed very minor work to fit. A good bit cheaper than other sources.

The J3 exhaust is a bolt on mod in the UK for Champs. All the parts fit under the cowl and it exits to the right side a la J3. The system is certified on the A-65 and the C-85 and it shouldn't take much to convince the Feds that it is OK.

[joea]

Mike N,

What about paperwork on your exhaust system? Were they STC'ed for your plane or did you have to do the 337 route? (or did you just bolt them on??)

Does anyone know about overhauling a set of HW mufflers? Cost and turn around time? Am coming up for annual in a month or so and trying to get my ducks in a row.

Thanks,

JoeA

[mike newall]

Joe, I am in the UK, so our airplanes are on your equivalent of an experimental ticket and we don't need paperwork for items like this provided they are made to spec.

I would have thought for you guys, one of the overhaul shops that advertise in Trade a Plane would be the most cost effective method.

Hope to see you at Copperstate Joe, emailed you seperately.