Aermore Exhaust Whistle

A couple of you have aermores on post-crossmotor tractors. I plan to put one on a '29 L and will have to build a valve. I have two designs that are based on Don's photos from a while back - one with a single butterfly that blocks the outlet and forces exhaust up through the whistle (like original) and a second design with an additional butterfly that closes the whistle bung when the main butterfly is open. The reason for this is that it appears that automotive valves had the second butterfly. I know original L and C valves only had the single butterfly, but I don't want the whistle to make noise when not in use. I've also thought about installing a fixed deflection shield before the whistle bung to encourage the exhaust gas to skip that port unless it's forced there when the main butterfly is closed.

So, what have you guys experienced with your whistles? Do they make any noise when the valve is open? I'd appreciate any info or pictures you can provide. I've already combed the forum archives several times, which has helped a lot. I have a No2 and a No00. Hopefully the L can blow the 00 and I may use the 2 on a 1930 C someday.

I lent mine out,,Jason F may have some made, but it was really pricey, so i think it got tabled for the moment.
Don L.

more complete ...not mine....and not for sale, he says. I sell new repro whistles, but have no diverters. How many people would set up to the plate to have these made....spendy
Don L.

Fred Goodrich, Steve (DE), Dr Cy Kosis, and you are the ones I know of that have discussed this style of valve and the whistles. Fred has a whistle on an LA, but I don't know how it's mounted.

I have mixed feelings on having them made. They sort of fall into the same category as early CC steering parts. Part of what makes them neat is that there aren't many around. On the other hand, they're a piece of history that could get forgotten if there aren't many examples left. It's not like anyone's going to start making thousands a year, but even a few reproductions can take a little glory away from the people who manage to track an original down - and that's said by someone who doesn't have early CC steering parts or a Fulton valve by the way. So, I don't know. I'll make one or would entertain the idea of a reproduction. "Pricey" is relative, so we'd have to see what the quote looks like. Making one isn't going to be free either. Maybe some people feel making one is the same (in regards to those with originals) as buying a reproduction, but its not the same to me at least. On the other hand, not everyone has the knowhow and resources to make one, and they should get to play too. I think I've run out of hands.

No disrespect meant to you for making reproduction whistles or anything else by the way. What size do you make? Do you think the 00 is right for the L? That's kind of what I gathered from looking at Dr Cy Kosis's posts.

I just now saw this, headed off to work, will reply later.

I have a few of the Aermores. The Aermores were available as dealer accessories through Case. I have an early thirties Case brochureI listing and showing them installed on an L. I currently have sizes 2,1,0,00 &000. I haven't found anything big enough to blow the 000. I have a 2 on the C and it's just about right. The C will blow the 1 but not real loud. You just don't get much of anything from the 0 and larger. My C was worked over by a former owner who pulled it and is pretty healthy, I'm not sure how a stock C with a worn motor would do. I have yet to fit any of the Aermores to the L. I need to replace the busted up outlet on the manifold before fitting one to it. I made a stack for mine that mounts the whistle, has a long bracket the attaches to the fender support and has linkage and a bell crank to open and close an ordinary rain cap flapper. It's made so it can be easily taken on and off. You'll also have to plug the drain hole at the bottom of the exhaust elbow. I put a bolt, washers and a nut in mine so it's not permanent. You will get some faint whistling noise when running. If I had it to do over, I'd make the outlet for the whistle a "U" shape and hope it would actually draw air back through the whistle when the flapper is open and eliminate any unwanted whistling.

I'll try to upload a picture of my C's setup.

Thanks for posting! That's an innovative setup. I'm glad to hear the 2 is right for the C. I'm hoping, based on others' comments, that the 00 is right for the L. I'm going to try to eliminate the faint whistling. I plan to start as simple as I can and add features until unwanted noise goes away. I'd like to avoid the double valve, but can do that if needed. Hopefully a diverter baffle will do the trick. Thanks again! I like your tractors. How about a pic of all the sizes lined up for size comparison? That would be neat. I guess the 2 is otherwise occupied already.

Here's a few. Left to right, small unmarked (I forgot I had this one), Two #2's, #00 and a #000. Pictured with the #000 is what is supposed to be an original tuning tool. I also have #1 and #0 sizes. I got my first one from the bottom of a tool box bought at a local auction. Once I found out what they were and that they had a tie to Case tractors, I tried to buy evey Aermore I came across for a while. I acumulated a little stack of them out in the shop. I guess I have 6 sizes total, multiples of some sizes, but not sure how many I have.

Wow, the #000 is a monster. What's the tool do, bend the big tube lip in and out or bend the outlets?

I'm not sure how it works, I'm not sure it's really an Aermore tool. That's just what it was purported to be by the seller. If it does anything at all, it appears it is to bend the outlets. I just left it tethered to the #000 just in case it really is anything.

I see. Thanks again for the pics!

I have an original Aermore #00 whistle for sale. Anyone interested? Contact for picts and more information. JKennady-Texas