bigedmustafa

My Feedback: (2)

It took three days to get the engines to you? You live in Conneticut where B.J.'s Model Engines is located; you should have been able to drive over and just pick them up at your leisure.

The distributor, www.kangkeusa.com, is located in NY State just a hop, skip, and a jump from where you live. Even if B.J.'s Model Engines had them drop shipped, I'm surprised they didn't arrive in 1-2 days. There's nothing particularly wrong with shilling for Bill Jensen if he's a friend of yours, but at least try to make it less obvious.

bigedmustafa

My Feedback: (2)

B.J.'s Model Engines sure sounds like a terrific place to shop, jjaypops!

[link=http://bj-model-engines.com]BJ's Model Engines[/link]

[AKA]StraferX

I purchased a JBA .56A and it arrived today. I hope to get er broke in this weekend. Probably will be on the bench testing since they are calling for monsoon rains, high winds and cold . May be thee flying gods will give us another break here to get some air time in.

lowbatt

my JBA New F series 46F and 56 F have came from factory. this sunday i will brake in and test it fly..

mpascual

My Feedback: (1)

News: "the 4 stroke engine will be ready at March" (2008, of course).
JBA will deliver first batch in April/March

bigedmustafa

My Feedback: (2)

I received the following e-mail and pictures from Ed Moorman regarding my JBA .56. Ed is busy breaking in his JBA .56, and he has his Thunder Tiger F-75s to test as well:

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Ed,

Here are some more photos of your engine in the air. You can see it was a clear day and pretty dry for us down here. The engine choked down in outside squares, but I landed and opened the needle a little and it was OK. This is pretty common for us since we normally have a fairly high humidity. Not as high as up in Alabama, north of us. For some reason, near the coast it isn't as bad. Anyway, on a really dry day, everyone's engines run lean.

I'm going to test fly a new Ultra Stick 60/SK 90 tomorrow. Next week, I'll get around to removing your engine and sending it to you. Mine is on the test stand, but not run. I'll do it the same as I did yours and install it in the Wild Stik.

The photos are a little glary. Mark, who took the pictures with my camera must have bumped the control knob from the program setting to aperture priority so they came out with too much contrast.

Ed
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I'm looking forward to finally seeing my engine! It's nice to know that it will actually fly a plane. That Wild Stik is pretty cool looking with the negative angle of the wings. Apparently it removes the coupling effect when in knife edge flight.

[AKA]StraferX

Finally got around to putting my JBA .56A on the test bench this evening. My new tach-0-meter descided today was a non working day so we went by ear. Gotta say I am please. The break-in went well and very excited about throttle responce. Quite snappy motor. Looking forward to seeing it in the air.

[AKA]StraferX

Replaced the battery in the Hangar 9 micro tachometer so went back to the test bench. Here are my results.

Motor: JBA .56A
Fuel: Dynamite Blue Thunder Race formula 10%
Temp: 50* @ 13ft above sea LVL with 8 mph winds and 18% humidity
Tach: Hangar-9 Micro Tachometer
Plug: OS#8 -used
Prop: TopFlight 11 x 7 and TopFlight 12 x 6

Series Prop Max rpm Idle rpm

Tank 1: TF 11 x 7 @ 11,700 3600
Tank 2: TF 11 x 7 @ 11,739 3285
Tank 3: TF 11 x 7 @ 12,000 3100
Tank 4: TF 11 x 7 @ 12,120 2600

Tank 5: TF 12 x 6 @ 11,120 2500

I will perform another battery of bench runs tomorrow with a fresh glow plug and see how well it goes. So far I can see and hear the performance increasing as the test results show. Plenty of nice grey goo when running rich and good smoke. Throttle responce from 1/3 rd to full, 1/4 th to full, 1/2 to full and 1/8 th to full are very tight with no hesitation. I think it actually showed me some teeth when I tried to bogg it down but it wouldn't. Two bolts on the back right side of the head wanted to keep loosening a little bit so I tightend after every run. The only complaint I have would be that on the right side mounting tang were it meets the body, the paint is ever so slightly sparse. If thats the worst of my problems, I can handle that. I am very pleased with the performance so far and I anticipate that after a few more tanks of castor goodness she will be running in peak condition and tuned properly. Attached is a couple pictures on my crude test bench next to a garage I am building.

rainedave

My Feedback: (1)

That engine looks a lot nicer in your photos than it does on the Kangke site. Thanks for the test data.

David

[AKA]StraferX

Second set of bench test results are in and this motor is progressing nicely. Throttle response is still good and the castor blowing out the muffler is starting to get a little cleaner looking. I went with a fresh/hotter plug an OS A3. So here it is.

Motor: JBA .56A
Fuel: Dynamite Blue Thunder Race formula 10%
Temp: 40* @ 13ft above sea LVL with 27 mph winds with 42 mph gust and 36% humidity
Tach: Hangar-9 Micro Tachometer
Plug: OS A3 - fresh
Prop: TopFlight 11 x 7 and TopFlight 12 x 6


Series Prop Max rpm Idle rpm

Tank 6: TF 11 x 7 @ 12,200 2570
Tank 7: TF 11 x 7 @ 12,260 2550
Tank 8: TF 11 x 7 @ 12,300 2550
Tank 9: TF 11 x 7 @ 12,300 2550

Tank 10: TF 12 x 6 @ 11,300 2400


I am pleased with my results so far. This is the second engine that I have broken in and have learned a lot between the two. I would really like to try another tachometer and compare. What do you guys think of these results. Am I on par with what is to be expected. Is this good/bad?

Fuelman

My Feedback: (6)

I have a JBA 56 and I was pleasantly surprised at how nice it ran. On initial inspection when I bought it, the inside of the engine had a lot of swarf and machining dust / debris in there that I flushed out. Pinch was nice and tight, which I thought was a good sign.
It started right up without problem and I ran a couple tanks through it like I normaly do without problem.
When I started fine tuning it, I did notice that the needle valve settings would sometimes have effect and other times little effect. I discovered the problem of it having horrible needle valve O-rings. I pulled them out and lubed them up nice with pure castor and all was fine for a dozen runs or so. I need to replace the O-rings for accurate tuning. It looks like they were too big for the application and were slightly cut upon installation. Other than that, I thought it ran fine and have flown it numerous times on my dad's Sportster Bipe. It ran a lot stronger than the 46FX that was on it (it had to be removed due to its liner peeling for the second time).

bigedmustafa

My Feedback: (2)

Well, it looks like Ed Moorman is finished with my JBA .56 and is preparing to start flying his own. I received a nice e-mail from Ed today that sums up his experiences with the engine so far:


"I am leaving the needles right where I had them. The high speed might be a little rich for you. I always fly with a nice smoke trail so I don’t get too lean in maneuvers or at the end of a flight.

Your engine has 5 break-in runs, plus 2 or 3 tanks for the rpm testing and 4 or 5 flights, I forget. It 1-flip started and never missed a beat in the air. I flew it with an APC 12.25-3.75 3D prop, Omega 10% castor blend fuel. I would say an 11-7 or 12-6 would be good props, too. The glow plug is a K&B that I had and nothing special. It didn’t come with one and this one lasted the whole time. I wouldn’t change any of the settings for the first flight. Oh, yes, I had a kill button set up on my JR 9303 and the engine shuts down after maybe a 1-3 second delay.

They both started by hand in usually 1 flip. The only time I used a starter was when I was doing the rpm runs and ran short runs to tune for max rpm, then shot down and changed props. The engine never got a chance to really cool down. I bumped it with a starter and it went right off.

To tell you the truth, I have looked for a down side and haven't found one. It just starts up, runs good and keeps on running. And it will definitely out turn any .46 out there. Maybe not a Jett on a small 10-6 prop, but probably would on a big one."

Ed (Moorman)

I have a Phoenix Models SeaBee ARF that is likely going to be the new home for this engine once Ed ships it back to me from Florida. It's 10 degrees Fahrenheit today with 30 mph north winds here in Omaha, NE, so having Ed test out this engine for me is about as close to glow flying as I'm likely to get for a while!

It looks like the $79.99 I spent on this JBA .56 has turned out to be money well spent.

Ed_Moorman

My Feedback: (1)

And I got to try if first, check the rpm on my test stand and then fly it. I liked it so I bought one of my own. I'll be flying it in a couple of weeks. This weekend, my buddy Flaps Laffert has me testing a refurbished Northrop A-17, 1930's dive bomber and predecessor to the Douglas SBD Dauntless, which he flew in WW II. It's been cleaned up after hanging a couple of years and a new set of Robart retracts have been installed. It has perforated flaps.

The photo is Flaps and the original A-17. Magnum 1.08 power.

Turk1

Kangke replied no JBA 56 available now until may.I wonder anybody can buy a JBA 56 from Kangke these days?(Special treatment for me??)

bigedmustafa

My Feedback: (2)

Well, maybe they're out of the old style like Ed Moorman and I purchased and they're expecting a shipment of the new "F series" models in the spring? That's too bad that they're out of stock just before the spring flying season starts.

NM2K

My Feedback: (14)

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Yeah, but it has that blue crap all over it. I don't understand folks' fascination with color that will scratch, chip and peel off over time.


Ed Cregger

kestrel0222

My Feedback: (1)

I tend to agree with you Ed. I personally do not like the color of these engines (or any other "painted" engine); I much prefer the "natural" look.
My main interest in this hobby is pattern flying. So if I were to purchase an engine that has been painted, it will affect the planes color scheme (the overall visual impact is important to me).
I am by no means "judging" the performance of this engine, it may be a fantastic running and reliable engine, just the overall appearance is not what I would like to see. I wish we had the option to purchase this engine with or without the blue paint.

bigedmustafa

My Feedback: (2)

You guys are funny!

You can rest assured that all of that unsettling blue paint will soon be hidden under the cowling of a Phoenix SeaBee ARF, and the world will once again be safe from aethestically displeasing Chinese engines!

Ed_Moorman

My Feedback: (1)

Shoot, I didn't know people didn't like engine paint. Here I went and bought some red brake caliper paint to do a couple of my engines. (Red is my color. I normally wear a red cap and red polo shirt when flying and a red coat in the winter.)

[AKA]StraferX

I like the color I think it makes it faster I do wish their were color choices and I wish the color was adonized. I can see the paint chipping off relatively quickly.

What would be a good sized 3 bladed prop for this JBA .56.. Just curious?

A6Ordie

Here is a Australian site that has the F series engines. http://www.hallamhobbies.com.au/index.php?ID=4&DID=18 They looked to be a bit higher in price, but I have no idea the conversion of Au Dollars to US Dollars to get a rough comparison. Plus if memory serves R/C stuff in Aussie land is higher priced than in the US. They have 3 sizes listed in the F series. a 46, 52 and the 56

Thanks for the great report Ed was a pleasure reading it. I'm very interested in the 4 strokes. I have a couple of Magnums since they are reasonably priced and love them, but wouldn't mind another brand to have.

Dave

Ed_Moorman

My Feedback: (1)

I checked out that site and the F series seems to be a copy of the OS .55AX. They have the same shaped head, the same monting lugs and the same carb with both needles on the same side.

I also noticed that the displacements of the original 56 and the F Series 56 have different displacements. The original calculates out to be .579, or nearly a .58. The F Series 56 has a displacement of .556. Both the bores and strokes are different.

rainedave

My Feedback: (1)

The muffler also resembles the OS Power Box. Note the four small fins at the rear.

David

bigedmustafa

My Feedback: (2)

Just a random thought, but maybe O.S. Max caught wind of these new painted "clones" being produced by JBA and that's why they cancelled the blue LA series engines?

It wouldn't make much sense for JBA to intentionally imitate O.S. Max's cheapest line of engines, however. I guess I really don't know why they go through the trouble to add blue paint.

mpascual

My Feedback: (1)

JBA 'F' series is not a OS clone. It was developped in the USA. I'm testing this engine long time ago, i'm done a review for a local model magazine, and NONE of the parts are the same. (maybe the screws)
I have both 56F blue and natural, and the blue is not so uggly

Best regards