does any one know any thing about the new gr pro 26ei or any thing good or bad about gr pro engines.I tried to do a serch on them to try and find out how much they cost ...but no dice, all i found was the home page.if they are real cheep you probably get what you pay for.I have a zenoa26ei and it ran flawlesly right out of the box . Things ya dont know .... ya dont know till ya know em.

Hi Sunnyday,
I have one of these mounted on my SU26, have not run it yet but will run it later today. The plane is not finished yet, so groundruns only for today. I will keep you informed. I will hopefully fly the sukoi this weekend.
regards

I've test flown several planes with this motor, (LS Pro 26, same motor, http://lsproengines.com/lspro_004.htm ), they run great. I've flown a Seagull SS, a Cermark Pitts, and a 73 inch Yak54 powered with them, power is great, spool up is quick, idles very well, nice Pitts muffler stock. I've flown the Pitts maybe ten flights, great combo I would say a perfect motor plane match. It doesn't have unlimited vertical, but a full size one doesn't either, but it'll haul the little sucker around and go straight up until it's real small then I do an outside snap into a inverted spin, real pucker factor.

The only negative is that they don't have a choke on the carb, so the first start is tough needing a starter, after that for the rest of the day it's one or two flips. I just bought one for myself, I intend to just put a fuel line to the carb opening so I can prime the engine, if you do that it starts with two or three flips on the first engine run of the day. Larry had them on sale for $275 when I bought mine.

I have tested some of the the GRpro engines range, and found especially the 26cc lacking. It puddled fuel in the crankcase, so the engine would sag badly on any attitude change. Starting is excellent, and so is the ignition used. So I tried to rebuild the engine to side carb configuration. Still the same problems, and quite low on power. All as of status may 2007. With this engine, I got quite a bit less than I paid for. Even so much less, that i decided not to bother and invest in time/effort any more. The best engine in the range was the 45cc with side carb. After rework, it was an excellent performer.
The design may have changed that I do not know of, so ask questions and return warranty before you buy.

@ soarich:
The engines from the shanghai engine valley area are by no means all the same. Some sellers work extremely hard to get their product ready to perform as required by today's market satandards. Copperhead is one of them. He has folks over there to watch over all deliveries.
It is sad to say, that there are others, that sell engines at large profits without investing in any form of quality control and backup services. In between there are shades of grey.

@ Pe

All the engines I've flown where mounted inverted, could that be the difference?

The only engines that I can compare them to are the RCS 140re 22cc, and SPE26 of about a year ago. I flew the SuperStar with the SPE-26, then Larry put the LS-26 in it, it seemed to have more power with the LS-26. Another guy had a RCS 140re 22cc motor in a SuperStar it had more power and seemed to be a better motor all around, but it cost $425.

I've found the same thing with the Chinese engines, quality control is lacking. With the three engines we have flying at our field there have been no issues, other than the lack of a choke.

Inverted mounting can make a big difference, especially if fuel puddling is suspected. During my test program the engines were upright. I ran the 45cc side carb engine upright and as sidewinder.
Chances are slim I will find the time to test again, because I would also have to repair stripped threads etc due to wrong bolt lengths and lacking thread diameter tolerances.

Hi Guys,
I promised that I would post results today and that is what I am doing. Ran the motor yesterday evening. Now please bear in mind: I am at 6800 feet ASL fuel used 93 octane 32:1 Castrol TTS about two weeks old (the mix) weather very very dry at about 30 degrees C.
Choking the motor is a nightmare, without the cowl I can reach through the firewall and put my finger over the carb opening (remember no choke) once the cowl is on, there is no way I will ever get to the back of the carb.
Started the engine with a starter, and it took very quickly and was purring away with a JFX 16X8 prop. I let it warm up and opened the throttle to about 1/2, by now it was evident that something was not right. The engine was not running smoothly...I tried to tune it like I always do, L-end first to obtain Idle, and then the H-end to obtain max RPM, but the engine was not running cleanly. Then I stopped it an loosened the ignition pickup (the way its fitted, you can not move it at all, you will have to take one screw out completely to move it to either side.) I advanced the timing as far as it would let me, with one screw removed and restarted the motor, this time by flipping it. I started on the 3rd flip and it was immediately running smoother. I let it warm and opened the throttle, low end was a bit lean for a clean transition so I richend it ( It’s very easy to adjust this engine while it is running, as the needles are on top of the rear mounted carb far off the prop). Now there was something happening, it ran very nicely, idle at 2000RPM constant, instant transition and a good clean top end. I tach't it at 6900RPM on the 18X6 JXF, thinking that this is poor. I let it sit at idle for a while and the decided to put on a Menz S 18X6 prop. Restarted (with a starter) and it was running well. Let is sit at just above idle for about 5 minutes and opened it up, transition was not instant, but good with a slight amount of splutter (this might be what PE had experienced with the case filling) now the engine tach't at 7300RPM steady with the 18X6 Menz. It was left to idle some more and after about 5 more minutes, it tach't at 7400 on the 18X6........So, would I recommend it...I think so, its easy to handle and except for the ignition being retarded to far, it ran flawless, the power is not very good, but it is apparently getting stronger. It comes with a nice muffler that has to prove itself, Vibration is very little and it starts easy (with a starter). I think it's quite good, I will report back about what it will do in the air after the weekend.

Regards
Andreas

PE,
The 45cc engine, is actually a bought out product from a Factory called RCGF, this is one very good motor, comes with a genuine RCexl ignition and runs like no other 45cc I have tested. I started it set the needles and flew it right away. It performs flawlessly, runs a Menz S 21X8 at about 7500RPM and never even stumbles. Not only the best running 45cc, but also the strongest I have had so far. RCGF are the motors that are talked about under the PEAK name, this includes the Peak 65cc and the peak 45cc, the other motors available from peak are actually Grpro's products.

Regards
Andreas

driesbabe

You found the ignition was too retarded? If you move the sensor the direction of rotation that retards the ignition, which way did you move it?

The 5 LS Pro, (Gr Pro), engines I have and have run the ignitions where alls too advanced. I just got my 26, so I haven't checked it yet, the 3 26 I've flown ran great, but I don't recall the owners saying they changed the timing.

Geeees, I must be getting old
You are spot on, SOARRICH, I did retard the ignition, and not retard it......I spend half an hour typing up someting I thought is good, and then you have to correct me[X(]

Thanks for the correction Soarrich.
Regards
Andreas

response to several posts:

The 45cc I found just a tad shy of the MVVS 43cc powerwise, after I fitted the second front bearing that the crankcase had room for. I loved this engine/ignition combo.

About the RCexcl ignition:
This has been discussed in several threads, and no one seems to know exactly how to set the ignition properly. So I invested in a timing gun, built a test bench and did my own research. Hang on!
below 500 rpm, the ignition does not retard! So flip the prop slowly, and she will bite.
above 800 rpm, the ignition retards a full 21 degrees.
at 1500 rpm, the retardation is lessened up to ~3500, when retard is nil again. A very nice range that allows excellent throtle response without any power jumps or surges.
up to 8500 rpm, the ignition fires as set by the pickup!
above 8500, there seemed to be a very sligt retard again, catering for the higher squish velocities encountered in the combustion chamber.

On the 26cc engine not much good to say:
using an MVVS 26cc, rpm on 18x6 props is in the 9000+ range; 'nuff said about the performance, which is very very much below par. Piper cub fodder IMHO. Add the fuel puddling problem, and this engine is out of my book. There were more problems that I will not mention here. Maybe they have been addressed.
I used a syringe piston (rubber) covered spatula for the choking to reach into the confined space between firewall and carb. That worked fine. The choke plate off a Ryobi engine also would do the trick.

Driesbabe and Pe reivers ,would you recomend this engine .do you think it has the same power and reliability as a zenoa.Can you get replacment parts for the gr pro engines .Dries babe what the hek do you do in nambibia ,well we know what you do for fun ...... fly big model planes around in the bush and scare wild game ....hea hea.

Pe,
You say just shy of the MVVS's 45cc motor, (bear in mind, we are not talking of a GRpro engine here, it's actually a RCGF motor) that makes it a very powerful motor, as we all know that the MVVS kicks butt, and is easily compared to a much larger engine.
As for the Rcexl ignitions, I have not come across another more reliable and friendly ignition. I am bias though as I distribute these in Southern Africa.

Sunnyday,
You ask if I would recommend the engine?? I think so, as far as the bit of testing ha gone, yes, I think it’s an easy and uncomplicated little engine, and for the price that one pays I think it's not bad. However, the engine I have has had about 25 minutes of running, and although it behaved, as it should, it will have to prove itself. I do not like the Ignition....I am not saying that its bad, but it's not proven. Grpro have gone to great length here to make it look like an Rcexl, but it's not, and the manufacturer admits to this, mentioning some other things about it that I will not mention here. I will hopefully fly the plane on the weekend and we will see how the engine performs in the air. (I have encountered engines that behave as they supposed to on the ground, and as soon as they are put into the air all fails) As for the power, Pe has very briefly stated what he thinks, as things are at the moment, I think a Zenoah will be more powerful........With it's magneto ignition there is very little that will beat the Zenoah on reliability IMHO.

As for me being stuck in the bush, I'm a born and bread Namibian 4th generation, of German decent. I like it here, you can fly almost everywhere, as we have no noise restrictions, as for scaring game, the Springbok sometimes become a pain in the butt as they stand around on the runway and do not scare very easily. Other clubs have their problems with Ostrich. It's a good place to live.
Attached find a photo of what we do here.
Regards
Andreas

Ok here it goes,
I promised that I would get back after I flew the plane with the 26 on it.
The Plane is an ancient SU26 scratch built by one of my friends, it is heavy. At 74 inches it weighs 13 pounds on the dot wit the 26, now at 6800 feet altitude, this makes a sluggish combination.
The 26 started right up and was running well.... and that is basically where it ends, It ran well thorough all the 3 10 minute flights it did not stumble, go rich or go lean. Throttling was good trough and it felt like it was getting more reliable and stronger.

After the 3 flights it was tacht again, and showed a 300RPM increase, turning an 18X6 Menz S 7700RPM.
A good motor for the money if you ask me, if you are however looking for all out performance, get something else.
Regards
Andreas

Andreas, what is the engine? AN LS pro or a GRpro. I can hardly imagine the two are the same.

edit: non-topic issues removed, and apologies if I hurt someone's feelings.

Hi Pe,
The engine that I have is a Grpro, I bought it of a Chinese man called Alfonso of GRpro. www.grpro.com.cn. I thought that they where the same, but nowadays everybody is copying everybody so, its hard to tell.
regards
Andreas

Hello guys

I brought in a crrcpro 26cc from china (direct) and sent it to my mates in Richardsbay SA (Bell equipment).

They are busy testing it. So far we have 9200 on a 16x8 APC prop. I must admit we have still got to put her in the air and see.

Is this the same motor .... any ideas?


Regards

Wayne