Antique

My Feedback: (4)

The 18-6 Mejzlik is just the right combination, too bad the price is so high...
Phil from PK is making me some wood props to test, maybe we can come up with a prop that works well and is less expensive..[8D]

gboulton

My Feedback: (15)

Well, guys, I gotta admit. I'm stumped.

I can NOT for the life of me get rid of the interference problems I'm having with this motor.

Here's the details:

Rx battery is 14" from ignition, 12" from ignition switch. This is the nearest component in both cases.
Rudder servo 18", Throttle servo 19" Rx 24" away from ignition, Rx switch 26" away, elevator servos in rear of plane.
Ignition is mounted on the front of the engine box, 2" behind the motor.
Ignition battery has been tried both in, and on top of, the motor box.

Seems that no matter what I try, the farthest I can get from the plane antenna down is 40-50 feet, and that only to the rear of the plane. To the front of the plane, I can't get more than 20' antenna down. (EDIT: The problem is more severe at higher throttle settings. At idle, the plane range checks to a perfectly acceptable range...it's at roughly 1/4 throttle and above that the problems creep in)

After a couple of calls to Adam, some conversations with other modelers, etc, I have tried the following, all without success:

1) I have temporarily unsecured the rx battery, and moved it as far back as possible (30"+ from ignition) outside the plane.
2) I have temporarily removed the RX switch from the circuit, and hooked the battery strait into the rx.
3) I have removed the unshielded toggle switch I was using for the ignition, and replaced it with a standard rx type switch, and it has been located on both the cowel and the fuse just behind the cowel.
4) I have tried throttle linkage that was a single metal rod (with plastic ball connectors, no metal-metal contact), a metal rod run through nyrod, and nyrod only with no metal rod.
5) I have tried unhooking each and every servo lead, and running it outside the plane away from the other leads and Rx. I first tried unhooking one lead/control surface at a time (throttle, then ailerons, then elevator, then rudder), and then tried combinations, eventually getting down to having only one control group (say, throttle, or elevator, etc) connected.
6) I have wrapped the ignition in foil per Adam's suggestion.
7) I have clamped the plug boot onto the plug with a hose clamp, per Adam's suggestion.
8) I have tried moving the rx antenna in various locations both in and out of the plane.
9) I have tried 3 different Rx's (two Futabas, one HiTec) with 3 different Crystals.

I'm beat to death over this at this point, and, to be honest, getting a bit frustrated (certainly not at Adam or BCMA, but simply the situation).

Anyone have any ideas/insights/suggestions?

sbaugz

My Feedback: (37)

looks like you tried nearly everything. Have you tried PCM receiver?

blackbaron

My Feedback: (92)

Talked with gboulton this afternoon and discovered that the engine had a non-resistor plug in it. This may solve the problem. All of the engines should have a Champion RDJ8J plug in it. If they don't please contact me and I will send you a brand new NGK BPMR6F which is a superior equivelent. This may fix interference problems but if anyone else is experincing this problem with a resistor plug, please contact me and we will discuss an ignition swap or upgrade. Either way I am working on an ignition system upgrade for him that will eliminate this problem.

gboulton

My Feedback: (15)

SUCCESS!

First of all, a few comments:

sbaugz: No, I had not tried a PCM rx in the airplane. I'm a firm believer that PCM rx's don't ELIMINATE interference, they merely give you some options for dealing with it. In my personal opinion, that's basically applying a bandaid to a wound without treating the wound...the problem's still there.

Granted, in this case, it might (or might not, who knows?) have made the plane flyable...but I wouldn't have been real happy with the "solution".

Second, once again, let me say that Adam's response and service were, as expected, outstanding. Again, kudos.

Finally, it would appear that the resistor plug WAS, indeed, the issue. I was unable to find either of the plugs Adam reccomends on his website, but I DID find (at Advance Auto Parts) an equivalent resistor plug, the Autolite 2956, to replace the Champion DJ8J that had mistakenly been included with this engine.

After replacing the plug, I'm now able to range check the airplane, at full throttle, out to a GOOD 60' plus in all directions with antenna down, and over 100+ feet with one section of antenna deployed. Even then, when those ranges are exceeded, the jitters in the airplane are MUCH milder , best described as mild flutter, as opposed to the radical full-movement jerks that the surfaces exhibited previously.

SOOOOOOOOOOO

The weather nuts call for 80 degrees and 4 mph winds tomorrow...hopefully by this time tomorrow I'll FINALLY be in here raving about this engine in flight.

gboulton

My Feedback: (15)

Got a question for ya Adam (or anyone else)...

Is a 22x8 wood prop going to be too much for this motor and overload it? I'm fully aware the RPM's will be down in the low 6000's, and I'm ok with that. I'm just curious if you think I'll be overloading the motor and doing it any damage.

blackbaron

My Feedback: (92)

Your main concern is the engines ability to cool itself. I would watch it close to make sure you don't overheat the engine. That prop is a little big for that engine but if its a narrow blade wood prop you may be fine. If you are turning a wide blade than you will overheat the engine. I also would run some more gas through that engine and make sure your completely broke in before turning that prop otherwise you may bust that top ring down the road when you decide to run a smaller prop at higher rpms. That may be a little on the extreme, but anyone else who would like to chime in on this is more than welcome.

Scott Ellingson

My Feedback: (146)

I assume you are running the 40cc. I would think the 22x8 would be as little much for a new engine. On a 46cc a wood 22x8 is in the mid sixes so on the 40, 6000 may be about it. It would be a heck of a load on it. I would stick with maybe a 20x8 for a while. Let it wear in some then give the larger prop a try. Like a glow engine, they run hotter when new because of increased friction. Let it break in a gallon or 2 then give the big prop a try. It will take 5 gallons to fully break the engine in, but the biggest power gain seems to be in the first 2.

tomyrcmodels

the bolly 22-8 CF prop are suit for this engine , rpm between 6900-7100 , just right number I think

NM2K

My Feedback: (14)

--------------


Nuh-uh!

If it isn't safe to fly on FM - it isn't safe to fly at all. Trying different FM receivers is okay.

blackbaron

My Feedback: (92)

Some FM recievers are more sensitive to Electronic ignition than others. I have had customers switch recievers (even using the same brand and model) and the glitching goes away. Its important to have a hose clamp or something tighten the cap around the spark plug to ensure a solid ground. A resistor plug is a must! I have been told that a PCM radio is more immune to EFI because it operates a higher freuency band. I recommend using them if you fly gas with EI even though I fly with an FM radio.

Kamikazi

My Feedback: (4)

Umm - PCM uses the same frequencies as PPM. Main difference is PCM digital processing can throw out bad frames to make it look like you have a solid signal. This is good and bad... Good when the EFI is only enough to create what would be an occasional glitch with PPM. Bad because you don't know you have a problem... With an mild EFI problem, you can run into a situation where it suddenly gets worse (aircraft orientation, distance, etc) and suddenly the PCM Rx throws out ALL of the frames - LOCKOUT - and down you go with little or no warning. [&o]
Many people like to test with a PPM Rx first to be sure they can detect a potential EFI problem. Then, if they determine they are OK, then switch to PCM guarantee completely glitchless operation.
PCM does have one significant disadvantage over PPM - PCM is slower. It can have twice the latency (delay) between stick commands and actually moving the servos when compared to PPM.
Some believe that the best of both worlds is obtainable in the newest generation of DSP PPM receivers. They can filter out bad frames like PCM, but retain the speed of PCM.

tomyrcmodels

new video are uploaded. plane: SU-31 ,wing spen70' takeoff weigh8.8lb . engine: BCMA-SPE26 prop 17-10
[link=http://www.youtube.com/watch?v=8vErQx1bmtE]SU-31 with BCMA-SPE26 gas[/link]

majortom-RCU

My Feedback: (40)

Come to China, fly your gasser at a seaside public park! Hover into an onshore breeze! Looks like life is good in Shanghai. Anywhere in the US that park would be taken over for construction of tourist hotels and gambling casinos.

NM2K

My Feedback: (14)

-----------------


And to think. Many of them can't wait to be like us....! <G>

Phil Heller

My Feedback: (9)

I am not sure, but perhaps in Europe PCM is relegated to different frequencies. You would have to check with someone over there who would know.

Phil

gboulton

My Feedback: (15)

Just have to jump in here and send, again, kudos to Adam.

I won't go into gory details, but suffice to say I discovered a rather significant problem with my BCMA SPE 40 yesterday...a problem that, honestly, could well be my own fault.

Called Adam, and not only is he resolving the issue, but is going an extra step and tossing in some "goodies" to the package.

All i can say is this...

If you have ANY issue with his motor's, give Adam a call and a chance to work things out. This is one guy who DEFINITELY supports his product, and takes care of his customers.

sbaugz

My Feedback: (37)

I agree. I had some minor issues with my SPE26 that Adam solved right away. Three carbs later and it runs great and I can't wait to break this sweet engine in and fly her.

tomyrcmodels

just for fun, BCMA-SPE26 on 90 class F3A plane . balance is ok, not good look ,

capin

My Feedback: (11)

I also have to say I recieved a new 45cc homey with a bad ign which isn't Adams fault but he replaced it and I'm very happy with the BCMA homelite 45cc. Keep up the good work Adam! Brian

cap232sc

Hello tomyrcmodels,
What are the dimensions and weight´s model?
And the engine, are you happy?

Regards

Heli-NuBee

Received my new SPE 40 engine from Adam yesterday. The engine looks great and I can't hardly wait to install it in my Hanger 9 P-47. My brother received his SPE 40 engine about three weeks ago and will be installing his in a Great Planes Stearman. I'm sure we are both going to have fun.

Best wishes, good luck and good flying.

Heli-NuBee (Roger)

JoeVen

An SPE engines USA dealer is a great new... I never could get one from Mr. Tomy Shen´s company so I got started gas with a 45cc from other brand, but I´m still looking forward to fly this light 26cc in a .90 class pattern...
Guys, look at the engine pic shown upper, the trottle servo is directly linked to the trottle arm with a steel rod, even the servo is very near the ignition and battery...[X(].
Tomy, are not you having radio interference with this plane?

spacewalkerSG

My Feedback: (-1)

I think he does not have any problem...its shows pictures of it flying...well it could possiblely the servo were placed outside and recevier could be way back...

chcarlos

My Feedback: (9)

I have a spe-26 on order and would like to put it in a warbird. Any suggestions?

Horizon is suggesting that a zen g20 would do well in a 60 sized P-47. The spe-26 is lighter and smaller, so I guess it might work even better than the g20. One consideration is that the spe-26 seems to want a larger prop so ground clearance or looks could be a problem [maybe a 3-bladed prop?]. Horizon also lists a 26cc gasser as acceptable for their 150 sized P-47. Thoughts? Suggestions?