3W ENGINES HELP!!!!!
 

BEING FROM THE OLD SCHOOL"QUARDA ,ZENOAH ECT" I'M LEFT WONDERING IF THESE NEW ENGINES ARE UP TO WHAT THEY SAY!
I WENT TO THE W.R.A.M.S. SHOW IN WHITE PLAINS NY YESTERDAY IN SEARCH OF A NEW TECH ENGINE. I WOUND UP AT THE AIRCRAFT INTERNATIONAL BOOTH. AFTER MUCH FONDLING OF THERE NEW ENGINES I BOUGHT A 3W-50i FROM THEM . THEY CLAIM THIS ENGINE MAKES MORE POWER THAN A G-62 . HECK IT CLAIMS TO SWING A 24X10 PROP! I'M PUTTING IT IN A YELLOW AIRCRAFT SPITFIRE AFTER ALOT OF FOLKS RESPONDED TO MY ADD ABOUT A G-38 IN THE SPIT. WHAT DO YOU THINK ABOUT THE 3W ENGINES? KICK ASS POWER? I SEE ALOT OF THEM FOR SALE ON THE NET LEAVING ME TO WONDER IF THEY'RE ANY GOOD IT LOOKS LIKE A WELL THOUGHT OUT ENGINE EVEN THOUGH THE REAR CARB LOOKS LIKE A PAIN TO DEAL WITH . ANY HELP WOULD BE GREAT. LIKE I SAID , I'M USED TO USING THE OLD STAND-BYS . TIME FOR A CHANGE. THANKS , RON

3W ENGINES HELP!!!!!
 

Believe 3W's claims and Gerhard (of AI) know his engines. Unlike other engine manufactures who overstate their engine's power, 3W either accruately states the power or actually understates the power. For example, the 3w-24 (I have 15 of them for use in my univ research project) has as much power as the G-38 while weighing much less. I have a 2- 3W-50. They will swing a 22-10 at 7500-7600 rpms. A 24-10 would swing in the mid -6K (I am guessing from experience with these engines). Per cc, the single cylinder engine will swing a bigger prop than the twins but the twins are smoother. Full rpm fuel consumption is around the engine displacement in cc per minute (3W-50 = 50 cc fuel per min full throttle).

The rear carb is a pain but having the carb in "quiet air" pays dividends in smooth running during aerobatics.

Elson

3W ENGINES HELP!!!!!
 

The rear carb should not be a pain. Run in the engine on the bench and get everything adjusted and stabilized. Once it is installed in the aircraft, use another servo to actuate the choke lever, or run a rod out the side of the plane. Gas carbs rarely need to be messed with. One tip that will be of great help in getting reliability from the catb is a very good inline fuel filter on the carb inlet. Also install a filter on the pump you use to fuel the plane. The cleaner you maintain your fuel, the less carb problems you will have.

Vince

3w engines
 

3w are very good engines with a lot of power you have to be patient with the break in procedure.

They are not the lightest on the market if you compare it with BME or ZDZ but they are very strong and very well made.

I'm running a 42 on my Sig Sukhoi and I'm very pleased with it you will not be dissapointed you made a good decision buying it.

Happy flying.

Eduardo

Huh?
 

Run engine on a bench? This seems to contradict the factory instructions on the few 3W's I've owned: the engines generate a lot of heat and need to be flown to receive adequate cooling. Basically, it means your break in occurs in flight.

Re: 3W ENGINES HELP!!!!!
 

Hi Ron!

I've owned and flown a few... all nice engines with good power. Their one drawback to me, accept for the 150, is that they are usually the heavy weights in any particular size range.

3W 50
 

Elson,
You say your 3W 50 is turning a 22x10 at 7500-7600.That thing fuel-injected & supercharged ? :D That's the best figures I have seen for a 50 size engine anywhere. That's better then the 3W 60 's on rcfaq.What brand of prop is that?

3w engines
 

thanks to all who gave input. knowledge is power ! the nice thing about this hobby is ,you never stop learning. it's on to trubines someday ! boy am i asking for it ! hahahaa

thanks again guys

3W ENGINES HELP!!!!!
 

EJB

Those figures came from a Zinger 22 6-10 wood prop. Both of my 50's turn the same rpm. A Dynathrust 22-10 turned 7300. If you ever own a 3W you will find that the engine will equal or exceed the published specs. Many engine manufactures overstate their engine's performance. For example, the RCS 140 (22 cc) is advertised at 3 hp while the 3W-24 is advertised at 2.5 hp. I have run both engines and the 3W-24 is a much stronger engine turning the same prop 500-1000 rpms faster. Many people complain that the 3W engine is heavier. The increased wt is from increased fin area for cooling and larger more robust bearings. These engines are powerful and built to last.

Elson

3W ENGINES HELP!!!!!
 

Just my two cents warbird,my 3W 60i turns a 24/10 menz standard at 6400 rpm with only 20 runs.pulls my 103",24 LB chipmunk straight up,I think you will love your 50.Get it set on the ground and break it in by flying that bad boy.

3w
 

tiny? yeeeeeee haaaa !! :D

3W ENGINES HELP!!!!!
 

Hi, I thought I would put in my two cents worth. I fly in colorado with some really top notch aerobatic pilots. I have noticed a trend away from the 3-W engines. Overheating has been a problem, even with air ducts in the cowls. The base of the carb gets hot and deforms, allowing air to leak in and cause the engine to quit. Unfortunately the 3W distributor hasn't been able to help out, so most of the guys here have switched to the Desert Aircraft 100cc to 150cc twins. They are lighter than 3W and put out similar power.I know there are some guys who won't like this, but I'm just stating what I have seen over the last year.

3W ENGINES HELP!!!!!
 

ARE YOU TALKING TWINS OR MULTI'S OR SINGLE CYL. ENGINES?

3W ENGINES HELP!!!!!
 

The base of the carb can't deform, it's aluminum...It couldn't get that hot anyway, it's on a block of phenolic... The deformation of the phenolic block under the carb is coused by the flat rubber sheet used for a seal, and overtightening of the 4 bolts that hold it to the case..A few strokes on a flat surface with a piece of 180 sandpaper, on both sides of the block, will cure the warp...A thin layer of Permatex Ultra Copper around the edge of the block, not on the rubber, will keep it sealed...And Don't be a gorilla with the allen wrench on the bolts...The studs are aluminum, use care removing them from the block to flatten it....RC......

3W ENGINES HELP!!!!!
 

I ASK AGAIN , ARE YOU TALKING THE BIG 2 AND FOUR CYL. ENGINES? AS FAR AS A 100:1 FUEL MIX , THAT'S INSANE!
I DON'T CARE WHAT KIND OF ENGINE YOUR RUNNING , THEY'RE STILL MADE OF METAL! MY 3W-60i CALLS FOR 50:1 - 70:1
YOU CAN BET I'LL BE DOWN IN THE 50:1 AREA !

3W ENGINES HELP!!!!!
 

I should have said the block the carb sits on deforms. Yes I know it 's not supposed to but on the 3W twins I have seen the block deform enough to cause problems. I can't speak about the single cylinder 3W's, since I don't have first hand experience with them.

3W ENGINES HELP!!!!!
 

I FEEL BETTER NOW. HAHAHAHA I DON'T THINK I'LL BE BUYING ANY TWINS REAL SO. GUYS THANKS FOR ALL YOUR INPUTS GOOD, BAD OR INDIFFERENT. ANY USEFUL INFO IS GOOD . THANKS AGAIN , RON

3w in a spitfire
 

Guys, 3W makes one awesome engine. The power is unbelivable and is quite a smooth runner. Im also using on in a yellow spitfire only mine is a 60. Im running a scale exhaust and its spinning a 22/12 menz ultra at 7100rpm and is well broken in. Its got more than enough power to really make the spit move and it makes a great combo. The 50 looks shorter and will fit more in the cowl and should give sufficient power also. Just make sure it runs cool warbird_1 and you wont have any problems.
Evan Q.
http://www.homestead.com/evoshangar/home.html

another shot
 

This shot shows how much the head pokes out. Makes cooling kinda easy. The ignition is a c&h unit with a cool billet cap that is held in place with a clamp.
Evan Q.

3W ENGINES HELP!!!!!
 

evan . i have to fess up. i used your slot setup in the engine cowel to help with the cooling . i'm kinda worried about you exaust setup. though it looks great, i can't see where you will get a good back presser to help the engine run better . i had the same setup on a ziroi p-40 only all 12 pipes worked . i hated the black spots on the plane ! haha i went for the 50 cc engine on my spit 'cause i didn't feel i needed that much power. after all it's only 1/5 scale . thanks for your input and you have a nice bird there , ron p.s. what spray gun did you use to put down the camo? nice job i have a badger 150 with a med. tip

spray gun
 

Warbird_1, I used a paasche VL double action airbrush to do the feather lines between camo colors. The base coat and large areas of camo were done with an HVLP gun. All the markings were done with testors model master acryls with the same paasche airbrush and a small airbrush compressor.
Evan Q.

3W ENGINES HELP!!!!!
 

EVAN , DID YOU USE THE AIRBRUSH TO PUT DOWN ALL THE GREEN OR DID YOU MASK IT-SHOOT-IT THEN FEATHERED THE EDGES IN? THANKS ALOT FOR THE HELP. I HATE PAINTING !!!

3W ENGINES HELP!!!!!
 

If you take a look at the new 3W-150 twin, you can see that they did change the carb mount to a new composite material. I would guess that this is to address the problem that was mentioned above. I have an older 3W-100 twin that has been performing fine for many hundreds of flights. No leaks yet in my manifold.

paint
 

Warbird_1, I painted the entire fuse and wing with the base colors with the HVLP. Once cured, I penciled in lines where the camo color will go. Next, I sprayed the large areas of camo with the HVLP and then wiped up the base color areas with thinner to remove any overspray. I then went back and used the airbrush to make the fine camo line, always pointing the airbrush TOWARDS the camo color, to keep overspray off the base color. Once all this cured, I lightly scuffed all areas with 500 paper and water, then clear coated the whole works. Take a look at my webpage for more painting pics. Im off to go skiiing tonight, so email me if you need more info.
http://www.homestead.com/evoshangar/home.html
Regards,
Evan Q.

3W 150 Stats
 

Anyone know what a normal RPM range for a 3W150 and a 32x10 should roughly be? Thanks_Bob