kochj

What do you mean??
EDM...
I am not familliar with that term??
Will the harden steel crack??
Thanks a bunch for the pictures...
Justin..

radial1951

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Justin

EDM = Electrical Discharge Machining. Also known as Spark Erosion. Can "burn" a hole the shape of the electrode through any conductive metal, hard or not. Can be very accurate.

You probably won't be able to drill a hole in the cam gear. Although it may be just very tough rather than glass hard, don't know.

Regards RossG
radial1951
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SOUTHERNX

Hi Ross G,from looking at the exploded view of the Saito325 and the Saito450,it looks like the 325 has the extra gear between the crank shaft and the cam gear,whereas the 450 3cyl with it's slimmer crankcase drives direct from crank to cam gear,like single cyl Saito's.Don't need to worry about those extra five gears yet,I still have not run the engine,the only aircraft I have that will fit the 325 in the cowl is a Pitts Pithon sold by Dolphin Co. here in Australia,but I had this aircraft earmarked for an MVVS58.While not being as "3d" capable with the Saito,it sure would sound great,Mark.

radial1951

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Hi SOUTHERNX Mark

Yes i realise there is an extra idler gear in the cam drives of the 325R3. It means the cams run opposite to the single cyl Saitos, but probably no matter if the cam lobe profile is symmetrical, or a special for the 325.

You wanted some pics of ASP cam drives etc. One cam plate doesn't line up with its row of tappets, and the engine came complete with factory fitted chewed up cheese head screws holding the cam plates to their drive gear. Also note the pitting on the crankshaft where the needle roller bearing of the cam runs. The AR400 is a close copy of the OS Sirius 5cyl, in layout and theory, that is... Increased from 50cc to 65cc.

As I said before, I am not a fan of ASP/Magnum engines.

Regards RossG
radial1951
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kochj

That engine actually ran?
Or did the owner run the engine with the rust, and grind the rings out, with all that floating metal.??? err, rust I mean...

doinkedit

My Feedback: (3)

more grief[:'(] ! i reassembled the asp400 cylinder head that i pulled off the #5 cylinder that was running cool.just as i suspected,the valves where not seating very well.checked valve adjustment on all cylinders and rechecked all engine bolts.the intake tube bolts on all five cylinders were loose.remounted engine and fired it up with a 22x8 ma wood prop.decided to try some cool power 15% full synthetic oil.man it loved it!. ran two tanks but couldnt get a tach reading{too dark}.fired it up again last night to get a tach reading,and to simulate a flight.i wanted to know how long the fuel would last and how much mah the glow batt used.fifteen minutes on a 22oz tank with an inch left in the bottom.everythings going great.refueled,fired it up and  ran the throttle to half,figured just one more tank,and i would install in plane.ten minutes later i check on engine and its sound had changed.also noticed the #1 cylinder pushrod tube was loose!!!!.shut her down.pulled engine off stand,and to my horror[X(] one ear was broken off the#1 jug at the crankcase.pulled it apart,found two of the four bolts holding the jug to the base were loose!*** i say.just checked those three tanks ago.so now i need:jug.intake gaskets,push tube o rings and exhaust header{broke the flange right on the end of the pipe} im worried the bolts are crap.wont hold torque?guess im gonna find out if the jugs on the 1.60 are the same after all.man this thing might just become an ornament on my desk yet!!! 

 

radial1951

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Hidoinkedit

Very sorry to hear of your drama. It's probably not so much the bolts as the aluminium crankcase threads which won't let you pull the bolts up tight. Then the heating, cooling and vibration take over. Careful you don't strip the threads in the case!!

Perhaps a low to medium strength thread locker will hold the bolts but allow easy removal if needed.

Do you think the valves just needed tappet clearance or do they not seat correctly? I can hear the air hissing out the exhaust port on my ASP 61 when it's on compression, but it does run quite well.

Regards RossG
radial1951
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outacontrol41

My Feedback: (9)

The very reason I haven't bought one yet....because of stories like this. [&o]

doinkedit

My Feedback: (3)

the good news is that the rotating assembly looks perfect.also seems very robust and put together well.time will tell.i ran a magnum .70 and a.91 for couple seasons and had great luck.that was the deciding factor for me to pull the trigger.keep you all posted as the tale unwinds

kochj

I hate to agree, but It isn't a wonderfull thing, to pay for something to function, have it breakdown, and have NO product support...[>:]

It was this reason I jumped on the saito 325radial when saito had there 25year anniversary sale...
Now, I might sell it, as I now have a new moki radial on it's way...
Nice thing about the smaller Glow radials, is that they can be fitted to rather inexspensive airframes, and are easier to transport...

doinkedit

My Feedback: (3)

Nice thing about the smaller Glow radials, is that they can be fitted to rather inexspensive airframes, and are easier to transport...




thus allowing us mere peasants to enjoying flying as well

doinkedit

My Feedback: (3)

radial,

it appeared the valve seats are cut at a slightly different angle than the valves,thus allowing an"interference seal",after time of course.pretty common on all engines actually. ie: 44 degrees on seats,45 on valves 

doinkedit

My Feedback: (3)

should have the parts by wednesday or thursday of next week.all parts in stock at global services.little over sixty five dollars

radial1951

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Hi doinkedit

Well I'm impressed. Parts within a week and $65. Not so bad... but shouldn't the damage be covered by the Warranty? Oh well, never mind :-)

Re the valves, yes the difference in angles allows "line contact" for a seal, especially with bronze seats which are not usually lapped, as the grinding grit can become impregnated in the bronze seat.

As long as the guide, seats and valve stem are all concentric, it will seal just fine.

Regards RossG
radial1951
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doinkedit

My Feedback: (3)

parts for the asp hit my box yesterday.way to go global services!.as i am out of town on business till friday,repair and test run report will have to wait till weekend 

SJN

hehe....cool
What sounds better than a moki radial...........9 moki radials


[youtube]http://www.youtube.com/watch?v=Kj6vZn8MFzg&feature=player_embedded#at=14[/youtube]

outacontrol41

My Feedback: (9)

All the pretty identical yelow planes flying at the same time. I smell danger.....[X(]

chasrb

There's a Mercedes sitting on the flight line, if ya know what I mean!

outacontrol41

My Feedback: (9)

Doctors 'n lawyers 'n such.....

Detlef Kunkel

Hi friends,

I like to join in here from time to time because I find your experience and engine talk very interesting..
I did not read all 200+ pages, so I apologize if this question has been answered before.

When you screw together a cylinder head and a liner / cylinder, you would normally not adjust the final angle ororientation of the head with some cement or glue on the big fine pitch thread.
Rather you screw them together tightly, with sealing or without, with heat or without (depending on your design) and THEN you machine the bottom flange of the cylinder ( or liner). Both are usually not disassembled later, but a pair for a lifetime. Replaced as a complete group of parts in case of repair / damage.
Big radials often have round flanges at the bottom and use a lot of bolts with clamps to hold the cylinder to the crankcase; adjustment is done by some templates while assembling the engine.
When you machine the flange ( with drilling holes etc) such adjustment is not nessecary. Simply bolt it on the crankcase like normal.
A leaking engine at this special connection is a serious problem. High pressure, high temperatures, and maybe different materials giving different thermal expansion. You cannot add a sealing ( you would lose the angle adjustment as said above) and also lose compression. One chance might be to try to tight seal the big fine pitch thread.
A demanding task.

kivisto

Lawyers maybe, Doctors-not these days.

kochj

LOL\ You got that right...

chasrb

Okay, here is an application of a Siedel UMS built radial I would have never thought of!
[link]http://www.youtube.com/watch?v=0z2KBHHLk4s&feature=related[/link]

Strykaas

Awesome scenery ! Aren't they sponsored by Jetair ? That tail logo vaguely tells me something [:-]


PS : Heh we now all know what you're onto...

radial1951