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Archive for July, 2016
Posted by dmrcflyr2 | Jul 30, 2016 @ 10:22 AM | 5,656 Views
The 30 size 4 stroke comparison begins in earnest now. Today's videos are Parts 1 and 2 of Segment 1 of the comparison. Due to the length and amount of runs it had to be broken down into two parts.

I run the four engines, Saito FA-30S, Magnum XL30RFS, OS FS-30S, and the OS FS-26 Surpass, with a Xoar 10x4 prop. I perform two runs with each engine using two different fuels. Omega 5% with Klotz castor added for a total of 20% lubrication and Omega FAI 0% nitro and 17% total lubrication.

Weather conditions at the time of testing this morning was 82 degrees F and 79% humidity. Yes, I was melting by the end of the runs.

This is the first time I have ever run a Xoar prop and I will remember it well. I got popped and split open right through a leather glove on the second or third flip. You'll see it in the video.

I plan on doing more engine comparisons in the near future. On tap will be a 2 stroke 40 and 46 size shoot out.

Enjoy.

Part 1 of Segment 1
30 Size 4 stroke comparison Part 1 of Segment 1 (9 min 43 sec)


Part 2 of Segment 1
30 Size 4 stroke comparison Part 2 of Segment 1 (10 min 28 sec)
...Continue Reading
Posted by dmrcflyr2 | Jul 22, 2016 @ 06:10 PM | 6,440 Views
I am waiting for the final engine to arrive before beginning this in earnest. I will be conducting a 30 size 4 stroke engine shoot out. Basically comparing RPM figures with various props and various fuels. The engines to be included are:

Saito FA-30S
Magnum XL30RFS
OS FS-30S
OS FS-26 Surpass

This request was originally an idea from a YouTube subscriber in Germany who is trying to decide on a power plant for his WWI Air Combat airframe. he is building a Nieuport 28. Following the rules in the attached document. It sounds like a really cool competition.

I already have the 26 Surpass and the Magnum XL30, but the Saito FA-30S just arrived today. I immediately began the break in of this engine in preparation for the shoot out. The OS FS-30 should arrive on Monday.

Since I cannot enter a table here I just made a screen shot of the test matrix. Basically I plan on running each engine using at minimum a 10x4 prop, as dictated by the WWI combat rules, and probably a few others for Min/Max RPM. I will run this test on several different fuels as well focusing on the FAI as that is easily available in Germany.

Omega 10%
Omega 5%
Omega Control Line 10%
Omega FAI 0%

In preparation for the shoot out I tested out a multiple tachometer setup today too. I have been less than impressed with the GloBee tach I have been using lately. The Tower Hobbies one I have is equally crappy. I have since ordered a Hobby King unit and hope it performs a bit better.

That little Saito is one sweet engine for sure!
Saito FA-30S multiple tach setup (12 min 11 sec)

Posted by dmrcflyr2 | Jul 19, 2016 @ 03:24 PM | 5,700 Views
Well the idle screw that was missing from my latest Magnum XL52 engine finally arrived. It should have arrived yesterday as the USPS status was 'Out for Delivery'. Well it did not show up. Tracking this morning showed it went back to Tampa and then to Sarasota last night. WTH? This morning it showed 'Arrived at post office' in Largo at 7:09AM but not 'Out for Delivery'. I happened to be home and intercepted the Mail person and just as I was about to begin an inquisition I see her pull up an mailing envelope that could only be the idle screw. Finally.

Now with the screw installed to an approximate setting as my other Magnum, I strapped it to the test stand. Needle valve open 2 full turns, new OS F plug installed, tank filled, ready to fire her up. She popped on the first touch of the prop and the second flip she was purring away.

Whatever ill will I had towards Chinese made engines once again began to slip away as I advanced the throttle. This engine is sweet to say the least. Now I have no doubt that SOME Magnum/ASP engines are dogs, but I have been fortunate lately. I would not hold back my feelings on this. These two XL 52's I have are really well behaved nice running engines.

Just like the two ASP FS 80's I have had in the last month, these are nice engines. Check it out for yourself.

Magnum XL52RFS first run after a look inside (9 min 2 sec)

Posted by dmrcflyr2 | Jul 17, 2016 @ 04:46 PM | 5,313 Views
I began the break in of a NIB Magnum engine today. This is an engine I purchased here on RCG. It is the second XL30 I have owned. I have read very mixed reviews about this particular engine as far as quality issues and running performance. Now the first one I had I was unable to ever get it to hand start. Eventually I sold the engine. Aside from the non hand starting it was a good running engine. I replaced it with an OS FS-30 which hands down is a superior engine.

When I saw this one NIB for a price I was willing to pay I jumped on it. Today I began the break in of this engine. From my past experience I had reservations about whether or not I could hand start it on the first tank of fuel. Now one of the issues with this engine, and other Magnum engines, is the lack if a throttle stop screw. This makes it a bit harder to determine when the throttle barrel is open enough for starting. That was my issue again today and after a few flips I resorted to the electric starter.

After several tanks of fuel I was able to hand start this engine and the break in is well underway. The first video of the initial run is somewhat boring as I kept it at a constant rich setting. I have attached the video montage of subsequent runs. It seems to be a really nice running engine.

Magnum XL30FS Break in clips (7 min 54 sec)

Posted by dmrcflyr2 | Jul 16, 2016 @ 06:04 PM | 5,967 Views
So as I stated several posts ago, this is the first K&B engine I have owned. I am both impressed and disappointed in this engine. Let me explain. I ran it today for the first time. It would not hand start which is not entirely surprising, but it did leak fuel, badly.

Once I got it started with the electric starter I ran it quite rich as the instructions mention. I saw tons of fuel leaking from the rear of the head. Initially I thought, hoped, it was coming from the carb inlet. Well that did not turn out to be the case. It was coming from the top of the head, as seen in the videos, and running down the back of the engine pooling up in the rear of the back plate. Now the impressive part of this is that the engine was running well the entire time! I mean once I got it started, it never missed a beat. It would idle well and transition to WOT was good. The engine runs good.

So after the first two runs I took it inside and opened it up looking for some gross manufacturing defects that would be the cause of this leakage. I shot a video of that too. Well I really didn't find anything unusal but I did apply some Permatex motoseal 1 ultimate gasket maker grey around the mating surface of the top head piece. After re-assembly I ran the engine again, again I shot a video, and the fix seemed to work.

There are 3 videos linked to this post. Watch them all if you want to see the progression of the first runs, dis-assembly, and subsequent run of this engine.

K&B Sportster 20 The first runs (11 min 49 sec)


K&B Sportster 20 A Look Inside (8 min 15 sec)


K&B Sportster 20 Run after sealing leaks (8 min 11 sec)

Posted by dmrcflyr2 | Jul 15, 2016 @ 08:25 PM | 5,697 Views
I take a look inside this newly acquired used engine. This was going to be a Box to the Bench review video, but the initial inspection upon arrival showed the carb was missing the idle adjustment screw. The throttle arn was pretty badly bent as well but that is an easy fix. I have an idle screw on order and thus this video review instead.
Magnum XL52FS A Look Inside (15 min 0 sec)

Posted by dmrcflyr2 | Jul 13, 2016 @ 06:01 PM | 5,353 Views
For those that follow my blog you might be surprised by this news. I just bought my FIRST K&B engine! I purchased a K&B Sportster 20 from a fellow member here. Yes, after 28 years in the hobby, this is the first time I have ever owned a K&B engine.

I cannot say that there was ever really a reason for that other than personal choice. I have always favored the Japanese made engines but have owned numerous Chinese made engine too. I cannot say that I am on the K&B 'band wagon' or anything. This choice was really one of needing to try something new, and timing. I would never buy a used K&B engine but a NIB one was worth the risk.

Being a Made in the USA engine I wasn't expecting Japanese quality externally, and I wasn't disappointed. Sure it isn't the same high quality casting as seen from overseas, but it is pretty nice. I have no complaints about it. Judging by the date on the documentation this looks to be a vintage 1997 engine. I wasn't all that thrilled about the simple brass remote needle valve holder, but it should work fine.

The two piece exhaust system should be interesting. I think I will put a drop of semi-permanent loctite on the screws to keep this thing together.

The real test will come when I get around to running it. I will use the supplied glow plug and either Morgan's Omega 10% or FAI 0% for fuel.

Another reason I chose this particular engine as my first K&B dates back to my entrance into the hobby in...Continue Reading
Posted by dmrcflyr2 | Jul 03, 2016 @ 08:14 AM | 9,889 Views
Seeing as I now have a gallon of this Omega FAI fuel I thought I would run another engine on it. Now yesterday I pulled my old school open rocker FA-50 out and put a tank of fuel through it. The run yesterday was done using my standard Omega 10%. The engine ran fantastic! It is one of my favorite engines for sure, four stroke that is.

Anyway this morning I tried several different things. The first being to run this engine on the FAI fuel as a comparison. I use the exact same glow plug and prop; Hangar 9 four stroke and APC 11x6.

I recorded a max 10,440 RPM on the 10% fuel. Today with the FAI I recorded a sustained 9980 RPM. It hit 10,440 but only for a second so I didn't count that.

The next things that were different on this video was the camera angle and tach mounting. I ask any viewers that are familiar with my videos to provide some feedback on the camera angle as to which is preferred. I have links to both videos here. The first from yesterday with 10% and my standard camera angle and the second is the FAI fuel with new camera angles.

Saito FA-50 Open Rocker Revisited (6 min 58 sec)

Saito FA-50 on Omega FAI 0% nitro (8 min 45 sec)
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Posted by dmrcflyr2 | Jul 01, 2016 @ 12:57 PM | 6,040 Views
So I had one of my YouTube subscribers from Germany request that I run a particular engine on 0% nitro fuel. Well I do not buy or run any of my engines on that type of fuel. he wanted some RPM numbers for different props with this fuel. Apparently this is a common fuel for him/them to use.

I explained that I did not have that fuel nor was I sure if my LHS even carried it. My store carries Morgan's fuels and after a quick search I found that Morgan makes Omega FAI. This is 0% nitro, 17% oil content fuel. I was a bit hesitant to just go and buy a gallon of fuel that I would use one time. After a kind donation to my website I went right out to see if my LHS even had any of this fuel. Well, lucky for me and the subscriber, they did!

Here are three videos I shot today running my FS-26 Surpass on this fuel. One video is also running the standard 10% nitro as a baseline.

OS FS-26 Surpass Omega FAI 0% (14 min 31 sec)

OS FS-26 Surpass Omega 10% Baseline (9 min 22 sec)
...Continue Reading
Posted by dmrcflyr2 | Jul 01, 2016 @ 12:48 PM | 5,945 Views
I received an incredible gift from a great friend and RCG member Balsaworkbench. He provided me with a very low time OS 60 FP engine. Now of all of the engines I have owned over the years the 60 FP has not been one of them. That has changed now!! What a nice engine too! It came without an exhaust so I posted an ad here on RCG and as usual a great member came through with a NIP Thunder Tiger 61 exhaust. Thank your Hobbyfun100!

Well that exhaust came the other day and today I had a chance to run this engine. It is an easy hand starter and overall sweet engine!

OS 60 FP Muffler run (6 min 48 sec)