Okay all you wisses out there I've looked at B&Bs web site for the spects of a US41 and could not find anything. I would like to know the horse power RPM and other spects. Can any of you help.

---------------


Not if you call me a wiss! <G>

I think the last ones were rated for about 2 horsepower @ around 7k rpm turning an 18x10 prop.

If you get an early made example, before the US Engines reformed and relocated, you stand a chance of getting a decent, but heavy and underpowered engine. I haven't heard a single good word about the ones that were sold by Tower after the "factory" moved. But that doesn't mean that there weren't any good words. It just means that the guys flying them were too busy to write.

Seriously, if you haven't bought it yet, but you are stuck on that design, a Quadra 42 might be a better bet.

I have since dumped my old extra heavy and weak Quadra type engines and have updated to the American modified (Brillelli and BCMAE) SPE engines. They are very reasonably priced and now you can find used samples on the auction sites at reduced prices, which were not expensive to begin with.

Another engine in the same size and power range, but of infinitely better quality is the Zenoah G38. They are going for around $200 used.

It won't be difficult to tell if you have a good one or not, if you already have the US 41 in your possession. Just mount it up on the test bench and run it. I had early and late models of that engine. The late ones were really pathetic, from the samples that I have seen. Good luck with yours.

NCHROME:
I have a US41 on a TFGS Mustang......With the stock muffler and carb, it is left wanting...I changed to a B&B muffler, and a #144 walbro carb, and it is giving satisfactory performance... Turns an 18-10 APC about 7300 , and an APC 18-12 about 6800.. Does everything you'd expect a Warbird of this size to do.. It also took some breaking in....Another option is the Brillelli line of engines, their 40 will outperform the 41, and the 46 will match anything in that class... They sell for about $350 with EI....

I have a U.S.41 engine. The manuel that came with mine says that it is 3 Horsepower. The best prop that I have run is the 18x10. I tryed a 20x6 and 18x12 and liked the 18x10 best. It turns about 7200 R.P.M.s with that prop. Hope this helps. Wayne

Thanks you guys Ed and eugene I already have three of these engines and yes they are of the old series. I've tryed other props on them and they mostly like the 18/10 prop. Most of them are broken in and one has had a problem with MOTHER earth( need to send it in and get a new crank and prop adapter. Two of these will go on my 101" B-25 now and for my TFg P-51 I think I will either get a Brillie 46 or a DA 50. But I do have a 3W engine that I think is a 28 with a pitts style muffler and electronic ignition that I will be selling here real soon if I don't put it on my CE that now has one of these 41s on it. It is rated at 2.75 horses and will turn a 20/10 prop,

-------------


I believe I was misremembering the Quadra Q35's advertised horsepower rating (2 HP). I doubt that any USE 41 ever actually produced 3 HP, but that does not mean that they were not good engines for the price. I bought my original USE 41cc engine because it looked a lot like my old Q35. Remember when the Q35 was selling for $89.95 at Tower Hobbies? <G>

Horsepower figures, like gas mileage figures, are generally calculated with a pencil and a large imagination.. What's important is, my 41 spins the prop at 7200rpm, flys the plane very well, and is dependable as sunrise. It took about three gallon of fuel to settle the break in..
The B&B muffler, and the WA#144 carb mods were about $50 bucks, and i feel they were worth it, just simple bolt on changes that brought the engine price to $325.00.. It is NOT one of the alphabet engines,but it doesn't cost $5-$600 either....

Dug out some old literature from when I sold a few of them. The 35 was 2.5 HP and the 42 was 3 HP weight 3.8 LBS. Best all around prop for 35 is 18-8. 42 is 18-10. Highest compression 35 I still have was from the late 70s. Like a good wine, they just get better with age. They may be heavy and under powered but they just keep going, like the Eveready rabbit.

The Everready Rabbit. Good comparison.....takes a lickin', and keeps on tickin'

Hey nchrome! Got the crops all in?? Ready to start flyin' again? Just to give you a little encouragment, the 41's will or should work quite well, worst thing that can happen is for one of them to decide it's time to rest at about 200 ft. off the ground. I put a TF 51 together, and put a Fox 3.2 in and at 20 lbs. it is quite impressive and exciting to see fly. It is fast as it should be, and the power is impressive. The Fox is unfortunatley quite pricey, but the Brison I bought this spring was not, that is in a BME Edge and boy what a plane. I had an issue with the ignition, but replaced it with a CH I had on the bench.

Are you done with harvest? Good yields?

Dale

----------------


The vast majority of models do not need the likes of a DA or a 3W inside of the cowl. Most are well served by plebian utility engines.

I'm on an SPE kick at the moment myself. I love the light weight and low price of the Brillelli and BCMAE engines.

Ed Cregger

Greatone 65 We are just about 3/4 done with harvest and am getting ready to go to the farm this Feb. As you know I work the fall at the elevator and spring summer at the farm. The cycle goes on on on on on on on on on on on for about 10 years now.

Does anyone know what the carb settings should be on the US 41? Thanks

Start off with 1 1/2 turns on each. You'll have to fine tune after that.

Thank you very much Flypaper!!!

how do you tell if its an early model us41 ?

Well, if it's a real early US41, it'll have points, and it won't be a 41, it'll be a 35? After that, I'm not real sure what the differences would be.