I am glad to hear the numbers picking up a bit. If you like the MSC then you will really like the Vess props on it. We are selling quite a few with our 3mm engine stock. We turn the 22B at 6900 and a 23A at 6800 on two diffrent Yak prototypes.
These engines are top-notch and will become a mainstay.
We also are working on new mufflers and header with Bisson and other companies to provide a bit more product line, the stock muffler is unbeatable though if you have a cowl it will fit.

I changed my prop out from the TBM which I was turning at around 5600 on a DA100 to a Xoar of the same size (27X10) and I went from having very little pullout to having respectable pullout from a hover. There was a noticeable increase in performance just about everywhere in flight. I haven't put a tach on the Xoar yet, but it has more of a ripping sound on the ground than the TBM ever did, and the DA just seems a bit happier turning it. I'll get a tach on it next time out.

I need more info, keep up the good work! I think im gonna get one of these.

Guys


I just bolted a BN 3MM 53 to the front of an 85" Yak 54...(test hack) .............it pulled a 3W 22 x 10 at 6800 within seconds of start up, I set the high and low at 1 1/2 turns and it starts first time every time.

I'll be installing one of these donks into a 40 lb Warbird no problems..........and at half the price of a 3W or DA...........its got to be a good thing.

cheers

Alan

From a personal position I believe far too many people are placing too much emphasis on rpm counts and not actual in flight performance. I've had too many props with lower rpm counts than the "other guy" that truly out perform the higher rpm prop in every area. Camss69 is doing the experimenting the right way and looking to the the way the plane performs, not just to the numbers. Another thing that troubles me is that so many people want to run a larger prop than an engine can effectively handle. This is the case with many 50cc engines and most 23" props.

Unless the larger diameter is pitched down from a 22" prop there will be a substantial loss in rpm AND available power. It lugs them down and takes them out of the rpm band where they perform the best. The larger props also promote faster engine heating where in many cases the excess heat cannot be shed due to poor baffling or indaquate air flow through the engine. Having the correct mixture settings becomes even more important when swinging "over size" propellers.

This brings up an area that troubles me with the Vess propellers. They use an "A" and "B" sizing instead of numerical pitch, which means that nobody has anything useful to work with in sizing. I know one person that cooked off a ring and cylinder using one thinking that it was of a size and pitch that would suit the engine. So ended the use of Vess props for that individual, and many that he associates with. Sort of like electric motor manufacturers where everyone uses a non standard method of sizing a motor, causing a lot of consumer frustration and mulitple purchases to reach an end.

Bottom line is the fact that performance is not just in the numbers, but how the plane actually performs. The truth of that can be found with most stock Zinger and Top Flite props. They'll provide a high rpm count but generally poor flight performance in sizes useful for most gassers. The type and size of any given propeller is determined by the type of flying desired and the engine/airframe combination it's attached to. That performance can only be found through actual trial and error since one prop will not fit all performance ranges for any given engine. The rpm count obtained by others using the same engine and prop is not a good gauge of performance in many cases since there are so many user influenced parameters.

Back to the 3mm-53. It's a real good engine and with normal care it should perform extremely well over a very long period of time. Like any other engine just don't take it where it should not go. That includes hitting the ground and using excessively large props. That's my perspective anyway.

Vess 23A, 3MM TOC 53cc motor, 85" Yak Prototype, right under 17lbs = unlimited vertical power, great downline braking, 6800 RPM on the ground. Vess 22A, 3MM TOC 53cc motor, 87" Yak Prototype, 17.6 lbs = same, except 6900 RPM on the ground. Excellent prop for IMAC and 3D.

Guys

I just test flew the 3MM 53 in an 85" Yak 54, flying weight 18 lbs
With a 3W 22 x 10 fitted it had unlimited verticle and excellent all round performance........the engine had 5 mins of running from BNIB and apart from a little fluffyness at 1/3 throttle (probably due to rich mixture and 30:1 fuel mix for run in) .
Starting proceedure was simple, choke and turn over engine 10 times, flip, fires and dies, turn off choke, flip again and it starts on the third flip........once warm it starts first flip every time.

Cheers

Alan

Any update on the can headers for the TOC?