Heli-NuBee

I am considering an ESM LA-7, a TWM Zero or a GP Waco for the Laser 300 V.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

mike109

G'day

They all sound great. I think I would like the Waco.

My three Lasers are in a Sig Kadet (Laser 70 - total overkill), a 60 size Decathlon (Laser 100 - overpowered but very nice) and a 1/4 scale Space Walker (Laser 150 - just right).

The one in the Kadet just plods around, the one in the Decathlon sounds just right for the airframe at about 1/3 power. It is so quiet that as it flies past, what you can hear is the prop and the airframe noise but very little from the engine. The one in the Spacewalker is my favourite. Just the right amount of power and it hand starts so easily with a back flip.

Enjoy.

Mike in Oz

Heli-NuBee

I am going to do something a bit different with my Laser 300V engine. I am going to install the engine on a GP Giant Big Stik. This should be a fun aircraft to fly with the 300V. I picked this plane for my test bed because the engine is open to the air for cooling and access to carbs and fuel lines is easy. One of the concerns I have about the 300V is the fact that the carbs are located approx 3" above the center line of the crankshaft. Most planes are set up for the center of fuel tank outlets to be approx on the center line of the engine crankshaft. I am not sure that I can locate the tank on the Stik where the tank outlets are at the same level as the engine carbs. Has this been an issue for anyone else?

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

I received my GP Giant Big Stik from Tower Hobby today. The build will start tomorrow. I'm looking forward to getting this plane in the air with the Laser 300V power plant.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Kmot

My Feedback: (24)

Roger, mount your engine inverted. Fuel tank problem solved.

Heli-NuBee

Hey Tom, I agree, I have already looked at that issue and inverted is the way to go. The Stik instructions say it is OK to mount the engine above the center line and that will work out well with the inverted engine.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

I am making pretty good progress on my GP Stik build. I used heavy duty Dubro nylon hinges on the ailerons and flaps and 3/16" Robart round hinges on the elevator and rudder. I don't use CA hinges on larger airplanes because I had CA hinges fail on a larger airplane a few years ago. I am also using Hitec 645 MG servos on all surfaces. I just received the ARF last Thursday evening and the wing is complete and the fuselage is about 1/3 done. The Laser engine should be installed within the next few days.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

I am getting a bit closer now. The plane is pretty close to completion but I still need to tighten the covering and adjust the CG. My first GC check indicates a lot of lead will be needed in the nose. I was quite suprised because I thought that big twin Laser 300V four stroke would be plenty heavy but it fooled me.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

OK the Stik is finally complete and ready for engine break-in runs. GP Giant Stik, Laser 300V engine, DuBro 32 ounce fuel tank, Futaba seven channel 2.4 mhz receiver, Microsens 4B on board glow system, two 2500 MAH LiFe batteries for a total of 5000 MAH, Hitec 645 MG servos, Williams Bros 5" vintage wheels, GP 2" tailwheel, 3" red Tru-Turn spinner (has not arrived yet) and a MAS 20x8 prop. I had to add two pounds of lead weight in the nose of this ship to make the CG with the Laser engine. First engine run will probably be tomorrow.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

Here is a poor quality video of my second engine break-in run on the Laser 300-V. http://www.youtube.com/watch?v=CfPKp...ature=youtu.be I need to do a bit more break-in running and tunning before the maiden flight. I want to be confident that the engine will run reliably before the maiden flight. I lost two planes over this last year on maiden flights when the engines quit or ran poorly. We really don't need engine issues on a maiden flight.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

I went through the tuning procedure again this morning on the Laser 300-V engine with good success. I don't know what the difference was but the engine tuned right in today. I now have run a little more than 1/2 gallon through the engine. Everything looks great now, it runs very smooth, idles well and has great torque and power. It also seems to run consistently at full throttle now. I think I am now ready for the maiden flight, probably this coming weekend if weather permits.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Kmot

My Feedback: (24)

Your Laser 300V sounds great!

Is that an engine I spied on your bicycle in the background?

AeroFinn

Hi Heli-NuBee

You might like to see this:

http://www.youtube.com/watch?v=CnMbm...ature=youtu.be

This tuning tutorial video was made by Carosel43 (Jon) who works for Laser engines

Btw I destroyd one Laser 240v as the oil in the fuel failed. The 240v tends to run pretty hot, a bit hotter than the 300v, for instance. While there may have been a multitude of factors effecting to the matter the Byron fuel was the most probably cause for the incident, as reported by the Laser engines after they dismantled and inspected my engine. So please use good quality oil as Laser engines do not consume excessive amount of fuel to compensate poor lubrication / cooling characteristics of an inferior quality oil.

-Artto

Heli-NuBee

I had my maiden and two subsequent flights on the Stik today. The plane flies great but the Laser 300-V engine is not as powerful as I had imagined. I would say it has plenty of power but it is not a hot rod with unlimited vertical. At this point, I would rate it as about the same as a strong 30 cc gas engine. Keep in mind the engine is new and may gain more power as it breaks in. The first and third flights were great but we had a challenging second flight as the engine lost a cylinder on take-off and the plane was very underpowered. We managed to safely land the plane under those conditions but we do not have a clue why we lost a cylinder. We bench ran the engine after that second flight and it ran great so we flew it on the third flight where it also ran great. Go figure! We had one of the guys try to shoot some video but it did not come out. I just can't seem to find anyone in our club who can shoot decent video.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the redial rabbit)

AeroFinn

Congrats for the maiden!

As a benchmark engine: The Laser 360v turns the 22x8 about the same as DLE 55 as reported by Carosel43

I just tested my 240v today:

with 5% nitro and 17% Aerosave:

18x8 Menz: 8400 max rpm steady
19x8 Menz: 7350 max rpm steady

with 10% nitro and 17% Aerosave:

18x8 Menz: 8450 max rpm steady
19x8 Menz: 7600 max rpm steady

My engine is pretty new, too.

-Artto

Carosel43

Roger, great to hear the model has flown but am slightly surprised you lost a cylinder. Usually a pot going down is due to a tuning issue somewhere. did you remember to turn off the on board glow before tuning the slow runs?

As for power you should be seeing 7200-8000 on the 20x8 (depending on the brand of prop) which was enough to prop hang my 21lb flying barge (my jayracer test bench) when it was fitted with a 300.

The engine will become smoother the more you fly, if you have any other problems or questions let me know

Heli-NuBee

I had a couple of great flights today with my Laser 300-V engine powered GP Giant Stik. I am still doing some fine tuning on the engine but it is running great and just a tad rich right now.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

Heli-NuBee

I put a couple more flights on my Laser 300-V engine powered GP Giant Stik again today. The engine is running stronger right along as it continues to break-in. This is quickly becoming a very fun plane to fly.

Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

AeroFinn

Hi Heli-NuBee


How's your Stik and Laser 300v?

I just ordered a new 300v to replace my 240v on a Great Planes Yak 54. Actually no need for more power as the model is able to perform high vertcal climb, etc. with the 240v but I just want a tad more performance.

regards, Artto

Heli-NuBee

Hi AeroFinn, My Laser is performing very well. The engine seems to get stronger on every flight. I have at least 20 plus flights on the engine now. As always, the Stik flies great, it has good vertical and is always a center piece at our flying field. I'm sure you will love your new 300V.

Best wishes and good safe flying.

Heli-NuBee

AeroFinn

Hello Guys

I'm mounting a Laser 300v on a Great Planes Yak 54. The model will weigh about 16-16,5lbs with the 300v. I expect the vertical performance be unlimited but we'll see. The model is a bit porky for the wing size (1138 inē) but I I should be ok for IMAC / scale aerobatics. I'm not into 3d. The funny thing is the Pilot RC Yak 54 30% weighs the same but with much more wing (1400inē) so I might eventually go for it if the GP Yak doesn't fly well IMAC / scale aerobatics. By the way, the Pilot RC Yak 54 30% is probably suitable for the heavier 360v, too if one does not like the "default" DLE 55 etc. route due to the 2-stroke engine sound..

-Artto

Carosel43

At 16.5lbs the yak should be extremely well powered. The 300v in my Jayracer, which is not as powerful as the new version, would pull its 22lbs into a 60 degree climb right after takeoff. There should be no problem with the yak, just don't fiddle with the engine!

AeroFinn

I'm planning to not use any needle extensions along with the cowl to discourage unnecessary fiddleing..

Btw. ever since I skipped the clines with my 240v & aranged an appropriate tank set-up I have done NO fiddleing..the tuning just went very straight forward in the day 1st with the new set-up. Also, the tune did not change from one flying session to another so I expect the thing be the same with my 300v

Carosel43

It is most likely that the clines lead to the lean mixture that damaged the 240v in the first place. the lean mix while running hot burnt off the oil in that Byron fuel and that was it. I would imagine that were it for for the lean mix and overheating the Byron fuel would probably have been ok

AeroFinn

Yup I'm aware many have been succesful with the clines while I was not. Maybe I had a leak in the tanks maybe this maybe that. I don't really care as the engine now behaves as it should and the tank re-position was not that big a deal. So my personal hint for anyone who is planning to install a Laser twin on a modern arf is to just bite the bullet and get the tank position in accordance with the engine instructions.

Most of the 30-50cc aerobats have a tunnel in the fuse for a tuned pipe or canister. This tunnel can be used to fit the twin tanks so their centerline is on the same level with the carbs and within reasonable (less than 4 inches) distance, too.