dmrcflyr2's blog View Details
Archive for June, 2016
Posted by dmrcflyr2 | Jun 26, 2016 @ 06:48 AM | 5,343 Views
I noticed that I did not have many if any videos of these two engines. Yesterday I decided to take them out and do performance runs on each. The release to the market of these two engines is quite different. The 40X was reviewed in 1978 and the SS40BB around the 1987 time frame.

The curious thing is that the 40X features a more modern single piece crankcase design as opposed to the two piece of the 40BB. The two piece crankcase is an older design seen in the late 70's-80's OS FSR series engines.

Both engine turned the same 11x6 APC at nearly the same WOT RPM. Now I did not really lean either to optimum, but they were close. You can see the 40BB weighs in at 1 ounce less than the 40X.

Enya 40X vs SS40BB (7 min 30 sec)

Posted by dmrcflyr2 | Jun 18, 2016 @ 11:38 AM | 5,627 Views
Well as promised I ran this engine and shot some videos of it. I had some difficulty initially getting it started and it was completely my fault and not the engines. I neglected to follow the instructions for the initial needle valve setting and opened it too much. This resulted in a flooded engine that would not start.

Once I cleared the flooded condition and set the needle properly it was quite uneventful after that. The engine starts easily, runs well, and has good transition from idle to WOT. I have the needles tweaked pretty well in the second video. I might be able to lean the low end a click or two more, but for the most part this engine is ready to drop into an airplane.

It runs just like my first one did in 1989, very strong. I took a few pictures inside the engine after my 4 runs as well. As you can see it still looks new.

ASP 46A the first run (10 min 30 sec)

The performance run.
ASP 46A Performance run (4 min 34 sec)
...Continue Reading
Posted by dmrcflyr2 | Jun 15, 2016 @ 05:32 PM | 5,659 Views
Completely uncharacteristic of me, I bought another 'Made in China' engine. I was perusing eBay last week and found a cache of 90's vintage, new old stock ASP engines from a fellow in Portugal. These are the European marketed versions.

As for the nostalgia, the ASP 46 two stroke engine was about the 3rd or 4th engine I ever purchased. I bought my first in 1989 and installed it in my first Great Planes Super Decathlon 40. It was a nice combination and powered that airplane quite well. When I crashed that airplane I built another and powered this one with my first 4 stroke engine, an Enya 80-4C.

So I placed a bid at the lowest price figuring if someone wanted it more than me they could have it. Someone did and I did not bid again. The next day I received an email from eBay stating I had a second chance at this engine for the same amount. I am unsure if the original deal went south or this fellow just has a good supply of these engines. Either way I ordered it this time.

Well the engine arrived today and here are some initial pictures of the engine. It was a bit stiff and once again I question the quality of the oil the early Chinese engines were shipped with. Clearly the engine was NIB and unrun but it was stiff. I added some oil and a bit of heat and it freed up. I'll be putting it on the test stand this weekend....Continue Reading
Posted by dmrcflyr2 | Jun 11, 2016 @ 05:17 PM | 6,146 Views
I ran these engines today back to back. Both have about the same amount of run time. The Magnum had six tanks of fuel through it and the OS roughly the same amount. When I purchased the Surpass it was labeled a used engine but when I got it I found no real evidence that it had been run more than once. I have put about 6-7 tanks of fuel through it now.

The Magnum four strokes are 'clones' of the Surpass series of OS engines. These are the two closest displacements that I have between the two manufacturers so I thought a comparison would be fun.

Surprisingly the OS turned the same RPM as the larger displacement Magnum. Now I really did not REALLY try to peak each engine out but they are setup very similarly. The biggest difference between the two engines is that the OS has an airbleed carb whereas the Magnum has a twin needle setup. I was able to get the Magnum a bit better dialed in on the low end than the OS. Both ran and started easily by hand and had good transition.

Magnum XL 52 vs OS FS-48 Surpass (10 min 55 sec)
...Continue Reading
Posted by dmrcflyr2 | Jun 11, 2016 @ 08:24 AM | 5,650 Views
What is with me lately? The last 5 engines I have acquired have been of Chinese manufacture instead of Japan. In all honesty I have nothing against the Chinese made engines as long as I have no issues with them. Clearly the quality isn't up to par with any Japanese made engine in any respect, however that does not mean they cannot provide years of trouble free operation at a great price.

The latest engine I look at now is the Magnum XL 52 RFS. I purchased this engine here from a great RCG member. It is a new and unused engine less the box and accessories. Again the external appearance isn't as refined and clean as the OS counter parts this is a clone of but it is a good runner. I estimate that this engines date of manufacture is the late 90's early 2000's based on the fact that it has no blue valve cover. This looks more like the ASP sister engine.

I ran this engine for the first times today and was not disappointed at all. It took a prime very easily and hand started immediately. I did take a look inside the back plate and cam gear are before running. This engine was clean as a whistle and gleaming inside. Not one sign of corrosion or rust at all despite the theoretical age of the engine. I was shocked to see that the crankshaft incorporates a Woodruff for the thrust washer. This is a trait more indicative of the older OS four stroke engines. I did not see this on the ASP FS 80 or Magnum XL 70.

Magnum XL 52 RFS first run (7 min 26 sec)

Magnum XL 52 RFS second run (7 min 40 sec)

Posted by dmrcflyr2 | Jun 05, 2016 @ 10:19 AM | 6,468 Views
So I recently purchased a Magnum XL 70RFS engine from eBay. Unfortunately one of my poorer purchases. I paid a bit more than I should have and the condition wasn't quite as good as the ad seemed to indicate. Oh well, you get some great buys and some not so great buys.

I am not saying the Magnum engine is a lemon, a poor runner, or anything like that,. It is just it isn't as good of a deal as I thought I was getting. With that said I have it listed in the classifieds to try to recoup some of my money. But that isn't the purpose of this blog post. The purpose is to do a quick comparison of the XL 70 to it's sister engine the ASP FS80.

These engines are made in the same factory, by the same company in China, Shenzhen Sanye Precision Machinery Co., Ltd. That is not to say the engines are identical because they are not. They have different crankcase castings for the specific brand, ASP, Magnum, etc. Along with that I have taken some pictures showing some of the other differences between these 'sister' engines that I think are interesting. I guess I figured since I had one of each why not show these differences side by side.

One of the biggest differences that I noted in my videos is the LACK of a throttle stop screw on the Magnum carburetor. This, to me, is a big deal since I run tons of engines on the test stand, I always set the throttle stop screw to a point where I can get the minimum idle without killing the engine.

Another big difference is the intake...Continue Reading