I just saw an ad for an LS pro engine. A very attractive price - 775 for a 100 cc twin. Anyone have one?
the web site is
www.lsproengines.com

aa

I do!

I really like it, I have it in a Lanier Yak54 87incher, I fly it mostly at 1/3 power, anything more I have to be going straight up or I'll over speed the plane. I've included a picture of my plane and engine installation. It fits in the Lanier Yak 54 buy just cutting about 1 inch holes to clear the spark plug caps. The engine is about 10 inchs wide.

I want everyone to know that I've known LS for 30 years, but I've known Gerhart at 3W for as long. I am doing a website for LS, I'm not being paid I just wanted to try one, that's the link to it. It's not finished, think of it as a house without furnishings, LS is slow getting the specs to me, he's swamped with orders and shipping, and I can't guess at them My engine, will turn a 26x10 TF 6000 rpm on the ground. When it gets a little warmer, and I get the website done, I have a bigger carb to try for MORE POWER as Tim Allen would say, I don't need it, but that doesn't meen I don't want it.

BTW I started a thread on the LS52, which I have two of, it should be LS50, but when I got it it wasn't named yet and seeing how it uses two LS26 cylinders I thought it would be called a 52. I think the LS50 or LS52 is really going to be a hot seller, it's become my alltime favorite engine.

Ps the extra holes in the cowl are there because it had a DA50 in it before, but didn't have enough power.

I would get rid of the audio on the web site. Just my opinion.
Edwin

It looks like the DA knock off that was going for $400 last year.
I would love one of those at $400

Which engine are you refering to the single or the twin?

Edwin

The audio will be changed, I didn't know they where going to have the site active, it was there just to show LS I was getting something done on it, and that I need the engine specs.

ditto on the audio.
Weights would be nice

A 100cc engine that can only spin 6k on a 26-10 Top Flite needs to go to the doctor...or start lifting weights. No disrespect intended, but those numbers are truly on the light side of the power curve for most unpiped 100cc engines.

I just report the numbers I got with about 1/2 gallon run so far, it's been too cold and windy for the last 3 weeks to do anymore break-in or testing. On my Lanier Yak 54 which calls for a 50 to 80cc engine I have and excess of power, and the engine fits in better than a DA50 did. I don't think LS is competing with 3W, he told me the 3W has more power, but in the end the extra power wasn't worth the extra $600 to do the plane with 3W.



Panzlflyer

The audio will be adjusted, and infomation will be put in the web site, it wasn't ready for viewing when someone found it and linked to it, it will be ready in 2~3 days.

Soarrich... I think you are missing the point. This engine is marketed by 3 different companies (so far) and it is marketed as a 100cc. My 3w 85 twin would turn a Bolly 26x10 (the heavy CF prop) at 6700. It doesnt matter if you can't justify the extra money because you are putting a 100cc in a plane that at best needs an 80cc.

The point is if people buy this expecting it to be on par with most 100cc or even most 80s they are going to be dissappointed. There are several 80cc engines on the market that will beat these numbers brand new out of the box.

At $775 you are better to buy a 3w80 or ZDZ 80, save some money and turn more rpms. You will also get an engine that has been tried, tested, and stood the test of time. Like to see one after it has 15-20 gallons through it

my 2 cents.

Sinergy nailed what I was trying to say quite well. See if there's something that's being missed in carb tuning to bring the rpm up. Unless there's some untapped rpm in that engine you're not getting your money's worth even at a cost much less than it is. I don't know the engine at all, but a 100cc engine should be providing more power than a 70 or 80. If it does not, then you are suffering a penalty for the weight of the larger engine while sacrificing the power of a smaller one. You might want to see what happens with a more efficient prop while you're at it. The Top Flite will tend to be rather low on the performance level. It's easy to see why when the engine is running. Change the rpm levels and watch the prop arc. You'll like as not see that Top Flite flex forward and back quite a bit with the rpm cycles. That's nothing but lost power.

Play with it a bit and let us know how it all turns out as it breaks in. It would be nice to see a less expensive 100 that came close to all the others.

Yep about $400 lighter. I can live with that.

I have a SDC80 carb off a Quadra 100, the ventura area is about ~50% larger, so I think the engine just has too small a carb on it. 2 stroke engine technology is pretty well understood, and they are probably just copying someone's engine, I would be shocked if I don't gain 1000rpm with the new carb. I may be wrong but I think the ventura is 13.5mm, the SDC80 is 19.5mm.

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Agreed.


Ed Cregger

Please post the results of the carb change as we are all curious as to the outcome.

Karol

Honestly there probably isn't much point in going through the hassle of trying a different carb. This is basically the same engine BCMA sells except theirs is copper jugs.

He has changed the carb and the ign. it looks like and I am would bet he has tuned the heck out of it and found a good combination that works for these engines. On a 27x10 Xoar he is saying 5762.

Needless to say.. sure you have a 100 twin that is cheap... but you are not going to get the power of the more well known 100s. Most DA-100 will turn a 27x10 at 6300-6700 on standard mufflers.

It's the same engine with a different carb, LS supplies BCMA. Adam is a value added reseller, good guy.

That's my point exactly.

Adam (yes he is a good guy) will have tweaked thsi engine properly for sure.. 27x10 Xoar at 5762

This engine can't compete against other 80s on the market let alone 100s... so why waste $800?

The engine looks nice and shiny, but listen to both Silversurfer and Sinergy and let common sense prevail.

Karol

If you're only talking max hp you would be correct, BUT:

Is this $775 engine heavier than a $1200 twin 80, I think not.

Is a 80cc single as smooth as a boxer 100cc twin, no way.

Will this fit in a smaller round cowl than a 80 cc single? It fits my Lanier Yak 54 better than the DA50cc single that used to be in it.

I'll put a link on LS web page to 3W for guys that are willing to pay that extra $600 to get the most power, but there are some guys that would rather save $600 and let you have bragging rights to having the biggest one.

First let tell you flat out... I am not knocking the product. However the numbers don't lie and I have seen you recommend this engine when it's not the correct solution and one of the reasons for recommending it was price and its a 100cc.

3w80xi - 26x10 Mej prop (harder to turn then a topflight) 6200-6400 $600

ZDZ 80 RVJ - 26x10 Mej prop (harder to turn then a topflight) 6300-6500 $775

LS100 - 26x10 Topflight (flexes a lot and not a very good load) 6000 $775


All you have to do is look at the numbers... both of these engines are lighter.. 1 by a pound and the other but 2 pounds and generate more power. 200 - 500 rpm on a 26" prop is a huge amount plus the numbers I am quoting are on real props that actually work the engine.


If you have any experience with the 80s I mention.. you would be very hard pressed to say there was any excessive vibration from them because they were a single.

As far as what it fit in.. I can't even understand your example? A Lanier Yak Cowl is HUGE.. my buddy's Brision 3.2 seems to fit in it with no problems at all.. in fact he tested a Torch 90 in there for the extra power and it still fit no problems.

You last statement doesnt even make sense... these engines are cheaper that I am talking about.. and if you want to compare it to another 100 out there the power difference is night and day and well worth the extra $550. However anyone who is trying to get similar power to what this engine generates can get more power for less money.


Like I am saying.. I am not trying to knock the product.. but I feel people should be educated properly when spending this type of money. And just like Sharika says " My numbers don't lie"

sinergy

I'm not trying to get in a pissing contest with you, but there is no way a large single is as smooth as a boxer twin, large singles aren't called thumpers for nothing.

Yes, the Lanier Yak 54's cowl is hugh, but the DA50 stuck out of the bottom, looked ugly. The LS100 could go in without cutting the cowl if you didn't care that the spark plug caps rubbed on the inside of the cowl. I put small holes, (3/4inch), in the sides of the cowl for clearance.

I have no doubt that upto 100cc you can make more power lighter with a single, and I have no doubt that singles are cheaper. I know that with this carb which is too small it's the weakest 100cc twin, it may still be the weakest with my SDC80 carb on it, but not by much, I'm prettyy sure it's the cheapest big twin. As soon as it warms up some I'll do more test.

Soarrich,

Dispite all the ranting, Iam interested in the LS engines---but the 50 twin, not the bigger 100. Is there a thread for it?

If not, can you tell me if it likely suffers the same too small carb problem causing low RPM. Any insight you can provide would be appreciated.

BTW---I like the website, but not the audio. Also, some other views of the engines would be nice. Also, more detail like is the crankcase machined or cast, number and type of bearings, stuff like that.

That is not my intension... I am just pointing out some specs..

when was the last time you played with one of those "thumpers" I have seen 3 ZDZ 80 RV-Js and I dont see any thumping of any sort.. If you are thinking of the older Brision 6.4 single or something like that.. sure they were "thumpers".

Yes you are correct... it is the cheapest 100cc twin...

Someone enlighten me on the upside to this engine, heavier then the singles that put out more power an not even in the ballpark powerwise with other 100cc twins an admittedly shipped with a carb thats not the right size? Where do I sign up for one.....NOT

Put a good prop on the engine an your rpm numbers with plummet.