Just ran another new DA50, no muffler, 22-8 Menz, 6500 rpm...THERE IS NO SUBSTITUTE FOR CUBIC INCHES....a 50 is a 50 is a 50 is a 50....
24-8 ? Don't make me laugh..24-8 PK Plus, 5200 rpm....
It might pick up a few rpms when broken in, so what ?
For a comparison, I ran a Poulan 46 conversion, OLD chainsaw piston port technology, 2 ounces lighter, same22-8 prop, 63-6400 rpm....Who needs technology ?
Just the Poulan with the 24-8..4800 rpm..The piston porting at this rpm is WAY wrong, fuel coming back out the carb big time.,..

I worked for a chain saw Mfg for 10 years (Homelite).. we made different size saws cause.... ????? they were needed!!.. you can only trick up an engine so much. In the end... you run out of potential energy per volume of displacment.. everything else being equal.. Now if u were to Super charge.. then that changes things... but only for a Supercharged vs non supercharged.. BobH.

nobody ever said the DA 50R was a rpm king. What was said was it is smooth . This engine is silky smooth from idle to full with no rough transition's between. Every rpm in the engine is usable. I have a 24x8 menz on mine and have never bothered to tach it . The plane flies cool and stable with the big prop and unlimited vertical. Besides rpm numbers are for people that want to talk s---. If you want a rough ass engine with no usable low end and a light switch for a transition then get one. If you want smooth then you need a DA.

BTW the phrase is and has been, according to my 96 year old grandpa is THERE IS NO REPLACEMENT FOR DISPLACEMENT.

have a nice day Kent

Kent, did you know you were addressing one of the foremost gas engine experts in RC? Sounds like you're defending your choice of buying a DA. Rcign didn't say it was a bad engine, just that it ran like a 50. So many threads read that the DA 50 has more power than the G62.... Show me.

As for RPM number being for poeple who are excreting by mouth, I am so sick of "mine runs great," "I like it," ect. Tell me what it will turn on a specific prop then I'll know if it will pull the way I want it to, pulls great doesn't help me.

Nor did I..Smooth is a funny term..Smooth to one person is rough to another..
Direct quote from the DA owner's manual.."Beware of running the motor without the wings installed on the fuselage.Without the mass of the wings, vibration will be very pronounced"..
The DA and Poulan were run on a Black and Decker Workmate with a 2x1o bolted vertically on the top..They both shook, hard to tell any difference...A single cannot be balanced, it's physically impossible...Some are smoother than others..You want smooth, get a twin...Smoothest single I ever had was a 42cc Red Max converted brush cutter, had a heavy crank like a G62..Engine weighed 4 lbs...
Light switch transition ? Right...2000 rpm to 6000 rpm instantly, one click of the throttle..
Rough ass ? Engine finish or imagined vibration level..
The cast finish on the Poulan case is smoother than the machined finish on the DA..A few more passes with the milling machine would make it smoother, but time is $$ on a CNC machine...
Have a nice day, RCIGN...
I REALLY like the DA50R, but for $350.00 LESS ( I make my own ignitions) I'll take a Poulan...

DA50 on my DP Extra

Menz 22 x 8s
Got 7200 RPM today
700 Feet
70 Degrees
Stock Muffler


Just finished my first Gallon of Fuel.
32 to 1 with Lawn Boy Ashless


I'm curious to how many RPMs folks are running at for:
Ground idle ?
and
How many RPMs you recommend for Idle in the air speed ?

So what. I am defending the DA 50R against the crap people are saying that there are engines out there that have more power than the DA 50 R. Who cares if they have more peak power if that is all they have. I have some other brands that run well at idle and top end , but the rest of the rpm is like a cobb, rough. Like I said the DA is smooth Que Mas

Kent

I was not talking about the external finish of the engine or the amount the engine shakes on the bench. I was talking about advancing the throttle 100 rpms at a time, not mashing your motor. The DA has no roughness to power curve at any rpm setting. You are just trying to be hard headed.

Still having a nice day Kent

Me too..And hardheaded is generic in my family, I'm Norwegian and Swede, called "squarehead " in Minnesota

Kent, you're funny and we were trying to be as well.

Rcign1, keep feeding us the data, most of us don't have the resources to try out many different engines.

Hmmm, I wonder if we are related, since being hardheaded is generic to my family also ?

Looka here fellows I have spent $1000s and years trying to find a good engine , wasted time and energy on junk. Finally found an engine that is reliable, has a smooth power curve and uses gas. I'll defend this to the end with my hard head. You don't know what a relief it is to go fly and be able to get the engine to run and stay running. Going to fly and your engine won't run is not funny. No Mas

Have a nice evening Kent

BTW I have 21 gals of fuel thru this DA 50R, without as much as a hicup.

Will throw my .02 in, My BME 50

7300 Moki 22x10
7400 Menz Ultra 22x10
7150-7200 Menz S 22x10

J&A Pitts muffler, amsoil 50:1 ,and did I mention awesome transition, very smooth, doesnt shake?

BME 50 ? that was one of my previous experiences . Glad you are having good luck.

Kent

I have had several 50s, and this one is by far the best. There are good and bad engines from each manufacturer, one da 50 may be better than another da 50 (even though they are not supposed to be), so I guess I got a good one.

Hey, I don't fly 'em I just run 'em..My only basis for comparison is what they do with the same prop...I once tested 4 NIB G62 engines for a pylon racer..The best was 400 rpm better than the worst..It's impossible to make engines exactly the same, so some will be faster than others..Ford fanatics won't buy Chevys, same thing....We're fortunate we can have competition, it makes for the best engines....

I do have a BME 44 that runs very good. Just suppose I got the lemon 50 in the bunch.

Kent

flip the prop with the choke and its pops take the choke off and it starts i am feeling good about what ever gasser it is....

Brison, 3w, ZDZ, and RCs motors are in my planes at present...

ps i am getting 7000, and 7200 on my 2-50 cc motors....22 x 8 menz and bambula....

I have a new DA50R that has never been ran. Waiting on plane to come in. Anyway i know to break it in with Lawnboy Ashless 32:1 oil mixture. But after I run 5 gallons through it I've heard of two different ways to go (50:1 Amsoil 2000) or (100:1 Amsoil Premix) What are you guys running after break in period?

Thanks,

Mike

Don't tell. I ran 50 to 1 ams from the first flip. The neddles stabilized after less than one gal. Have not touched the carb in 21 gals of fuel.

Kent

I do not want to offend anyone here, but why would you run a gas engine without a muffler and tach it, then compare it to another engine?. That is not a realistic test. One engine may run better and more RPMs without a muffler. But be realistic are you going to fly your plane with that motor and no muffler?. If you are going to compare RPMs, Use a muffler for a realistic situation.
Who flys without a muffler. If you are going to test and compare engines , test them in a realistic situation. Maybe the engines work better with stock ignitions? What does the motor do with the muffler?. I have a DA 50 and I live at 3000 ft. I know guys who fly 18 lbs planes with a DA 50s and they have unlimited verticle. I have unlimited verticle at half throttle on a GP Wagstaff. I know guys who fly 17 lbs planes with G62 and do they have unlimited verticle?. No. They say they wish they could put a DA 50 engine in there planes but cant because they need the G62 for nose weight up front . Not putting down a G62 but the guys I know would really like to put DA 50s in there planes. And it is not about money because these guys fly $3000 airplanes.


My test results of DA 50 Tach meters, Futaba and TNC

22X10 Mej 7200 rpm
22X8 Menz "s" 7300 rpm
24X8 Menz "s" 6400 rpm

There are several members at our field with giant stingers with g-62's and they have unlimited vertical.They swing the same props at the same rpm so why would they not have unlimited vertical.

Something is seriously wrong if a G62 can't take a 17 lb plane up unlimited. Must be using a pusher prop. I would never buy a gas engine if that were the case. An OS 160FX can take a 14 lb plane straight up. There are many folks with 20+ lb Stingers on 62's that are unlimited.

In this ARF dominated time, I can understand but won't accept someone buying a heavier engine just because the plane needs nose weight. Folks just need to learn to build. All the posts said the Lanier Cap kit comes out tail heavy so I modified it. Now it will probably balance with a DA 50. Would be nice but I'll use the G62 I have and put the radio gear in the tail. Hope it will hover my 16 lb plane.

I owned a OS 160FX on a Sig Extra 18X6 Mej prop 13.5 lbs. It did not have unlimited verticle. Sure it would go straight and then fall off.
Did you own the OS 160 and test it or is it hear say?. I do not want to offend you but I do not think a 20+ lbs plane on a G-62 will have unlimited verticle. Unlimited to me is climb out of site and continue.

A giant stinger is a 20 lb plane and I sold one to a member in the club that has unlimited vertical with a g-62.And he is still flying this plane and I promise you if you have seen a g-62 on a 20 lb plane that will not go vertical without falling off there is something wrong with that engine.G-62's are used in great number's in warbirds that range in the 35 lb range and they fly great for what they are.Read rcign's thread on 50 cc vs 62cc.