ASP/MAGNUM FS400AR Rebuild/Overhaul
11-03-2019, 06:19 AM
#3276
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Sorry for poluting this thread with my Stearman.
I love this little engine and I am far from getting rid of it. In fact I am almost ready to pull the trigger on a UMS 90cc gas 7 cyl radial for the 87" Stearman I will be starting on shortly.
The aeroworks is just about finished. I still need to do 2 sets of flying wires.
I love this little engine and I am far from getting rid of it. In fact I am almost ready to pull the trigger on a UMS 90cc gas 7 cyl radial for the 87" Stearman I will be starting on shortly.
The aeroworks is just about finished. I still need to do 2 sets of flying wires.
11-15-2019, 01:49 AM
#3277
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Thats an awesome overhaul of the aeroworks stearman. I had my first one in one too... theres even a video on Youtube on it somewhere...
Anyways... I bought one for my PZL and it sounds like it is full of sand when running... so, in memoriam engines #1 and #2 and #3, here goes #4...
Big puzzle
Bearnigs completely shot...
and rust everywhere...
Ready to replace with good quality bearings...
Anyways... I bought one for my PZL and it sounds like it is full of sand when running... so, in memoriam engines #1 and #2 and #3, here goes #4...
Big puzzle
Bearnigs completely shot...
and rust everywhere...
Ready to replace with good quality bearings...
11-15-2019, 02:44 AM
#3279
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What, and miss all the disassembly and assembly fun?!
No, honestly, I am not putting €700.- or $750.- into this engine for a gas conversion. For that Money I would rather get a used Saito und clean this one every year.
No, honestly, I am not putting €700.- or $750.- into this engine for a gas conversion. For that Money I would rather get a used Saito und clean this one every year.
11-15-2019, 11:22 AM
#3281
Join Date: Oct 2006
Location: Sanford, NC 27332,
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Great Stuff!
That's not pollution Grassie! That's fresh air! I admire your skills! Thanks for the breakdown photos Reverend. (I hope I don't have to go that far with mine!) I think I've seen most of your videos, and they've been a large part of my decision to own one! Thanks to SJN for the engine porn! That's some COOL collection! I like your background, too! (It reminds me of my shop sometimes!) I found an Aeroworks Stearman NIB on RCG, that's close enough to drive and pick up, if I could only sell a few of my engines in time! The Aeroworks Stearman seems to be the perfect size for the ASP 400. I'm glad this thread is still alive, as I was feeling alone with my choice of this engine. Mine has the CH Ignitions gas conversion and Keleo exhaust ring. I'm leaning towards my 1/3 scale Balsa USA Fly Baby 1B biplane, but I'm wondering if the ASP would have enough power for good flight and basic aerobatics. Pulling a loop from level flight without diving would be nice. No, I'm not a 3D pilot. I prefer more scale-like flying. Anyone tried this combo before? Thanks and Blue Skies guys!
Last edited by SPACE COWBOY; 11-15-2019 at 11:25 AM. Reason: text
11-20-2019, 08:46 AM
#3283
The gentleman used a photo of a modification I made. I found the carb tuning on my first engine to be very inconsistent. In less than a 1/8 turn of the needle the tune would go from perfect to overly rich. Having a history of racing auto engine development I examined the carb first and found the manufacturing to be questionable. I considered replacing the carb with an OS model but the cost was prohibiting. My next avenue to explore was the intake tract and the first problem to address was the sharp right angle bend. My guess was the atomization was being negated and the droplet size was increasing. After fitting a new homemade straight intake manifold the tuning became much more consistent with improved throttle response and less fuel consumption. The engine also has a CH ignition spark system. I’ve since acquired a second engine and the mod improved it as well. Next I will work on lengthening the manifold and see if any performance gains can be found there.
11-29-2019, 10:17 PM
#3285
The gentleman used a photo of a modification I made. I found the carb tuning on my first engine to be very inconsistent. In less than a 1/8 turn of the needle the tune would go from perfect to overly rich. Having a history of racing auto engine development I examined the carb first and found the manufacturing to be questionable. I considered replacing the carb with an OS model but the cost was prohibiting. My next avenue to explore was the intake tract and the first problem to address was the sharp right angle bend. My guess was the atomization was being negated and the droplet size was increasing. After fitting a new homemade straight intake manifold the tuning became much more consistent with improved throttle response and less fuel consumption. The engine also has a CH ignition spark system. I’ve since acquired a second engine and the mod improved it as well. Next I will work on lengthening the manifold and see if any performance gains can be found there.
11-29-2019, 10:36 PM
#3286
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just the usual methanol hygroscopic tragedy. Due to high Workload at my daytime job the engine is still sitting on the workbench, waiting for my TLC.
First snow here so I am not in a hurry...
Rev
12-04-2019, 07:26 AM
#3288
Join Date: May 2010
Location: Spring Hill, FL
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Hello, got my motor running good but from your experience could someone recommend a minimum tank size for the 400, I am looking for at least 5 minutes at mixed throttle. I am using a 20x8 prop getting about 7200 rpm. Thanks
12-04-2019, 08:44 AM
#3289
I believe you would be better off using a larger prop. When your 20x8 unloads in the air your engine will probably rev to over 8,000rpms. I don’t believe these engines will live long at that speed. I have flown mine on glow fuel/ glow ignition and glow fuel/ spark ignition in 1/4 Bearcat weighing 22lbs. With a 22x10 wooden Falcon prop it revs to 5,700 on the ground and probably 6,200 6,300 in the air. I’ve flown 7 mins on glow ignition and 10 mins on spark ignition with + - 1/8 left in a 24oz tank flying in a scale like fashion.
12-04-2019, 07:06 PM
#3290
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thanks for the information, I agree that's a lot of RPM. this is a new motor I bought in 2010,just now got around to using it. I propped it low to get it running, but if its ok to maiden with a bigger prop I will go up. I am not familiar with 4 stroke glow, but I have followed this thread, or go with something in between? I don't need a lot of power.
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12-04-2019, 11:36 PM
#3291
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ASP 400 Radial prop size?
I've read that a 20x10 was a good prop for them, as well as a 21x8. The only negative thing I can say for most of the videos I've seen is, they don't mention prop size! I'm hoping the sizes I mentioned will work out OK, because I happen to have one of each in stock. I also have several 22-inch props in various pitches, but the engines seem to drop off quite a bit with anything over 21 inches. I just wonder what it translates into, when compared with the two-stroke gas engines that some of us older fliers are more familiar with. As an example: Would it have the power of a Zenoah G-38, Zenoah G-45, or a Zenoah G-62? My guess would be the G-45, just based on prop sizes, but I have no flight history with the ASP-400 AR Radial, so that's pure speculation. Anyone care to venture a guess? I'd like to know what to expect.
12-29-2019, 01:00 AM
#3292
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Hi Grassie here. My word! It seems like admin has changed some of the subscription rules as I can not sign in on my account any longer. I had to create a new account to get in. hope admin can correct the problem. Enough of that.
What a lot of parts goes into this little engine! Since Sanye is no more where does one get spares for these engines? Else I need to get my grubby little paws on another engine for spares!
What a lot of parts goes into this little engine! Since Sanye is no more where does one get spares for these engines? Else I need to get my grubby little paws on another engine for spares!
01-05-2020, 09:57 PM
#3295
Hi Grassie here. My word! It seems like admin has changed some of the subscription rules as I can not sign in on my account any longer. I had to create a new account to get in. hope admin can correct the problem. Enough of that.
What a lot of parts goes into this little engine! Since Sanye is no more where does one get spares for these engines? Else I need to get my grubby little paws on another engine for spares!
What a lot of parts goes into this little engine! Since Sanye is no more where does one get spares for these engines? Else I need to get my grubby little paws on another engine for spares!
04-14-2020, 10:15 PM
#3296
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Good morning from South Africa! I trust to find you all well in these trying times. We are in our third week of isolation. I would've thought that everybody would be chatting away on the internet but it seems like all of you are busy building!
I plan on starting the 400 again today just to make sure it doesn't rust up inside.
Well, you all keep save, this will all pass.
I plan on starting the 400 again today just to make sure it doesn't rust up inside.
Well, you all keep save, this will all pass.
04-14-2020, 10:43 PM
#3297
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Good morning from South Africa! I trust to find you all well in these trying times. We are in our third week of isolation. I would've thought that everybody would be chatting away on the internet but it seems like all of you are busy building!
I plan on starting the 400 again today just to make sure it doesn't rust up inside.
Well, you all keep save, this will all pass.
I plan on starting the 400 again today just to make sure it doesn't rust up inside.
Well, you all keep save, this will all pass.
greetings to my old home! Grew up in Pietersburg (now called Polokwane I am told) but been living in Austria for almost 30 years. This worldwide tragedy will soon pass, I am sure, and who would have thought that the social distancing, that is normal to most modellers, would come into fashion someday
I have continued build on my PZL, finished up the radials service and now its mounted. Can't wait to finally fly this thing.
Stay safe y'all,
Rev
04-16-2020, 03:59 AM
#3298
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Ok, I am back with a question or 2. 1 Which is the best glow plug for radials? I am using OS F. When I remove the igniter from the plugs, the engine starts to bog down.
2.Did you find the adjustment on the high end needle very sensitive? the range at which the engine runs fine is very small, 5 or so clicks.
2.Did you find the adjustment on the high end needle very sensitive? the range at which the engine runs fine is very small, 5 or so clicks.
Last edited by grassie; 04-16-2020 at 04:01 AM.
04-16-2020, 06:11 AM
#3299
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Ok, I am back with a question or 2. 1 Which is the best glow plug for radials? I am using OS F. When I remove the igniter from the plugs, the engine starts to bog down.
2.Did you find the adjustment on the high end needle very sensitive? the range at which the engine runs fine is very small, 5 or so clicks.
2.Did you find the adjustment on the high end needle very sensitive? the range at which the engine runs fine is very small, 5 or so clicks.
@1: OS-F are perfekt. If it starts tumbling without glow its dialed in properly
@2: Yes, the sweet spot is very thin. The carb is a catastrophe to work with though. I am changing it for an OS 60P soon.
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04-16-2020, 06:17 AM
#3300
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Thanks for the quick response. Yea, I had it that way. I bought new fuel, maybe that is the problem. I will revert to the Morgans LV and see if the problem persists.