Glow Engines Discuss RC glow engines

*** CLUB SUPER TIGRE ***

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Old 06-29-2012, 10:22 PM
  #1476
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Default RE: *** CLUB SUPER TIGRE ***

Some people are just ignorant, not on purpose mind you just uninformed. Then there are others. LOL
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Old 06-30-2012, 07:20 AM
  #1477
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Default RE: *** CLUB SUPER TIGRE ***

Since we are on the subject of Bowman piston ring. I have a 4-stroke glow engine (Magmum) that seems a bit weak. Has about 2 gallons through it. Should I consider a Bowman ring? Compression seems low.
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Old 06-30-2012, 07:35 AM
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not all rings are created equal!!!!!!!! some just buckle under heat and some are made of inferior material to start with!!!!!!! learned that the hard way when i was in the auto repair bez. it ALWAYS pays to buy a high quality ring (or parts) to correct a problem. 2 gals. of fuel should not have in it's self caused your problem. not knowing what conditions you fly in i can't say for sure exactly what problems you are encountering. has the eng. been overheated? is the ring STUCK in the ring land by varnish etc? are you running a premium fuel? has the eng. ingested sand or other trash? if you suspect the ring is just bad then remove the head and inspect the ring end. gap. if in doubt go with the bowman ring, you can't go wrong with his ring!!!! 1 more thing, did you buy this eng. new?????
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Old 06-30-2012, 08:00 AM
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ORIGINAL: fujiman

not all rings are created equal!!!!!!!! some just buckle under heat and some are made of inferior material to start with!!!!!!! learned that the hard way when i was in the auto repair bez. it ALWAYS pays to buy a high quality ring (or parts) to correct a problem. 2 gals. of fuel should not have in it's self caused your problem. not knowing what conditions you fly in i can't say for sure exactly what problems you are encountering. has the eng. been overheated? is the ring STUCK in the ring land by varnish etc? are you running a premium fuel? has the eng. ingested sand or other trash? if you suspect the ring is just bad then remove the head and inspect the ring end. gap. if in doubt go with the bowman ring, you can't go wrong with his ring!!!! 1 more thing, did you buy this eng. new?????
bought it new and broke it in according to instructions. But I had trouble with it not putting enough power from the start. I did have a couple of sort lean runs while tuning it (2 seconds max). Always used good fuel. I put it in a lighter airplane and lowered my expectations. Starts real easy, idles ok, max rpm is 9000 with a 12x6 (.52 c.i.)
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Old 06-30-2012, 12:21 PM
  #1480
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Default RE: *** CLUB SUPER TIGRE ***

Send it in for warranty , Idid. (twice)
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Old 06-30-2012, 04:45 PM
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ORIGINAL: jeffie8696

Send it in for warranty , I did. (twice)
unfortunately, warranty expired a long time ago. But I guess I can try the Bowman ring to see if it helps. Everything else with the engine seems good. Only the top end seems weak.
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Old 06-30-2012, 05:04 PM
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ORIGINAL: hsukaria


Quote:
ORIGINAL: jeffie8696

Send it in for warranty , I did. (twice)
unfortunately, warranty expired a long time ago. But I guess I can try the Bowman ring to see if it helps. Everything else with the engine seems good. Only the top end seems weak.
I'd put a bowman ring in it without batting an eye. His ring gaps are a lot tighter than stock rings so the compression should be vastly better. Even if I had an engine warranty, the cost of the ring would be cheaper than sending the engine in for warranty service IMHO.
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Old 06-30-2012, 06:47 PM
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Default RE: *** CLUB SUPER TIGRE ***

Mine had issues with leaky valves and a broken cam gear, its replacement is much better.
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Old 06-30-2012, 07:37 PM
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ORIGINAL: jeffie8696

Mine had issues with leaky valves and a broken cam gear, its replacement is much better.
Of course that's a totally different story. In that case, I'd send it back. A piston ring I wouldn't.
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Old 06-30-2012, 08:17 PM
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Default RE: *** CLUB SUPER TIGRE ***

the valvetrain is good, based on just limited experience and good behaving starting, idle, and throttle transitions. It's top end is weak only. So, I figured I'll try the ring change. Thanks for the advice, fellas.
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Old 07-01-2012, 04:45 PM
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Default RE: *** CLUB SUPER TIGRE ***

I've never heard of Bowman rings. Can you tell me a little bit more about them and send a link??

Thanks,

Bob
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Old 07-01-2012, 04:55 PM
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Default RE: *** CLUB SUPER TIGRE ***

Frank Bowman is very popular for piston rings, he makes them for just about any engine out there. If he doesn't have the specs for it, you can send him the cylinder and piston and he will custom make the rings for it. He'll do it also for anominal fee if you don't want to take the engine apart too.
His email address is ringmaster46@msn.com

My last ring list from him was in 2011 so it may be out of date now.
 
Frank Bowman

1211 N Allen Ave.
Farmington, N.M. 87401-3568
505-327-0696
 
 
 Email: ringmaster46@msn.com
 
Reproduction Model Engine Rings
 
Quality at a fair honest price. Making a good ring is a Skill. Making a fine ring is an Art!
 
Last Revised 1 - 7 -11
I will reproduce nearly any model engine ring. If not available, I’ll need a good piston and cylinder to measure, or send motor. Send return postage, insurance is extra. For orders outside of USA, ask for shipping costs? Priority postage is extra. An order of 10 rings or more, discount of $1.00 off per ring, mixed orders are fine! Ring cost & shipping charges for USA listed below.
Please Note:
If you send me an engine for new rings that I don't currently make there will be No labor charge to do this.
If you send me the stripped down engine block ( Block, piston liner and rod assy.) for rings, that I Do currently make No extra charge.
If you send me a complete engine to disassemble, clean, and install the ring(s) and reassemble there will be a minimum charge of $25.00 per hour. My buisness is making Piston Rings and $25.00 is the minimum amount I would be losing by not making rings and working on your engine insted.
ATTENTION : NEW MEXICO CUSTOMERS WE HAVE TO CHARGE YOU 7.125% TAX, please add the extra tax to your orders.
Standard ring up to .65 engines: $9.00 ea.(1) shipped $13.00, (2) shipped $22.00 (1) .64 (2) $1.28 
Standard ring from .66 & up: $10.00 ea.(1) shipped $14.00,(2) shipped $24.00      (1) .71 (2) $1.43
Dykes ring up to .65 engine: $10.00 ea.(1) shipped $14.00,(2) shipped $24.00      (1) .71 (2) $1.43
Dykes ring from .66 & up: $11.00 ea.(1) shipped $15.00,(2) shipped $26.00          (1) .78 (2) $1.57

** I also make special rings to order, ask for prices.**
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Old 07-02-2012, 04:30 PM
  #1488
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Default RE: *** CLUB SUPER TIGRE ***

Thanks... I see my engine listed. I thought that he might have a website too where I could get some education on rings. Can a dykes ring be substituted for a common ring or does the piston have to be specially designed for the Dykes?

Don't mean to hijack the thread. Thanks again for the information,

Bob
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Old 07-02-2012, 05:41 PM
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Default RE: *** CLUB SUPER TIGRE ***

Dykes ring pistons are specifically designed for them, they are recessed at the top.
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Old 07-02-2012, 05:50 PM
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Default RE: *** CLUB SUPER TIGRE ***

I just ordered a ring from Frank today. First ring from him. I will do a before and after test on the engine sometime in the future.
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Old 07-02-2012, 06:17 PM
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Default RE: *** CLUB SUPER TIGRE ***

I ran my Italian S29 with a new Bowman ring today for 24oz of fuel. Compression is decent but still softer than I'd expect. I haven't checked, but I'm sure the ring is pretty well seated. I'll verify tomorrow. A question I thought of, did the S29 come in ABC form or ringed only? If it did come in ABC configuration, can a ringed version be converted to ABC? Not that I'm in search of an ABC piston and liner, but asking more out of curiosity. I may go looking for a NOS piston and liner for my ringed engine in case the liner is out of round some. Perhaps I may have to see if I could get the bore of my engine hard chrome plated to give it a little tighter fit. It hasn't been peaked with the new ring yet so I don't have any numbers to compare to just yet.
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Old 07-19-2012, 07:29 AM
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Default RE: *** CLUB SUPER TIGRE ***

Reading the Threads to learn what I can, this plane has a 60, funny thing is I just got a 75 and it is the exact same size except it says "75"

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Old 07-19-2012, 08:00 AM
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Default RE: *** CLUB SUPER TIGRE ***


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ORIGINAL: Tom.in.Maryland

Reading the Threads to learn what I can, this plane has a 60, funny thing is I just got a 75 and it is the exact same size except it says ''75''

I am not sure about the G series that yours appears to be, but my S90 is the same case size as the 60 and 75 of that series (round machined head with dished top).
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Old 07-19-2012, 08:04 AM
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Default RE: *** CLUB SUPER TIGRE ***

Quote:
ORIGINAL: spaceworm


Quote:
ORIGINAL: Tom.in.Maryland

Reading the Threads to learn what I can, this plane has a 60, funny thing is I just got a 75 and it is the exact same size except it says ''75''

I am not sure about the G series that yours appears to be, but my S90 is the same case size as the 60 and 75 of that series (round machined head with dished top).
The SuperTigre 60/61, 75, and 90 both G and S series engines are 60 sized cases. If the front housing bolts on, the pictured engine is a S61K, a non bolt-on front housing is a G series engine. K suffix engines use the same head as the G series.
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Old 07-19-2012, 08:14 AM
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Default RE: *** CLUB SUPER TIGRE ***

Pictured above is a G61 ABC the 75I am talking about is a Ringed G75, Thanks.
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Old 07-19-2012, 10:43 AM
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Default RE: *** CLUB SUPER TIGRE ***

The same applies to the G40/45/51. Even though the 45 is ABC. You get the displacement increase by making the cylinder liner thinner and with a stronger metal, hopefully.

That's why the higher displacement versions are lighter than the lower displacement ones. So the 90 is listed as lighter than the 60 and the 51 is lighter than the 40. That is because the heavy cylinder liners are thinner in the bigger displacement versions (less metal, more air).
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Old 08-08-2012, 08:50 AM
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Default RE: *** CLUB SUPER TIGRE ***


Okay all you Super Tigre afficionados out there.
I need help with some specific information on the Super Tigre engine in the photos. On the exhaust side of the cylinder it says "Series X G.60". On the other side it says "Made in Italy by Super Tigre". It has a crankcase vent but it is plugged and not being used in the old Aeromaster Biplane in which it is mounted. I can recall years ago that it hauled that old "heavy" Aeromaster around the sky with quite a lot of authority. I would like to get some idea as to the vintage of the engine and whether it is anything special as Super Tigre engines of that vintage go. I have looked on-line but all of the similar looking "Super Tiger .60 Bluehead" engines I could find had a large, rather conspicuous bypass port running up the side of the cylinder. This one has nothing of the sort. Since this one has a bolt-on front end, I would like to get it running, rotate the front end 90 degrees so it will run in "reverse" and use it in a pusher aircraft. What kind of performance can I expect from this engine? Any information you guys can give will be greatly appreciated.

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Old 08-09-2012, 11:23 AM
  #1498
Matagordababy
 
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Default RE: *** CLUB SUPER TIGRE ***

I have a NIB ST-6000 that I will never get around to using - never mounted, never run, new as they come, in case anybody is interested. Too many Toys, not enough Time! I paid $600 plus Shipping on eBay. Photos available if anyone is interested.

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Old 08-19-2012, 07:13 PM
  #1499
hsukaria
 
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I need advice tuning my ST G51. The past year or so I noticed that the midrange transition is very rich and I get a stumble, sometimes big surges (engine cuttng) while transitioning from idle to WOT while flying. It acts like it is very rich in the midrange. Sometime ago I loosened the 2 throttle barrel screws and rotated the throttle assembly very slightly clockwise to help lean it a bit. The low speed needle valve is set as lean as I can get it without sacrificing a good idle, the high speed needle is set just a bit rich from peak. So, should I rotate the throttle barrel clockwise some more?
I am running 15% nitro with a medium plug, 11x7 prop and a MACs one-piece muffler. Performance is excellent except for the throttle transition.

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Old 08-19-2012, 07:21 PM
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Quote:
ORIGINAL: hsukaria

I need advice tuning my ST G51. The past year or so I noticed that the midrange transition is very rich and I get a stumble, sometimes big surges (engine cuttng) while transitioning from idle to WOT while flying. It acts like it is very rich in the midrange. Sometime ago I loosened the 2 throttle barrel screws and rotated the throttle assembly very slightly clockwise to help lean it a bit. The low speed needle valve is set as lean as I can get it without sacrificing a good idle, the high speed needle is set just a bit rich from peak. So, should I rotate the throttle barrel clockwise some more?
I am running 15% nitro with a medium plug, 11x7 prop and a MACs one-piece muffler. Performance is excellent except for the throttle transition.

Thanks.
I'd drop the nitro some first. They may tolerate higher nitro when breaking in since they're ran rich but when broke in and run leaner, act up. If 5-10% nitro does the same thing, then rotate the spraybar. I rotate mine so the fuel inlet fitting is pointing at the engine mount lug.

I noticed on my Tigres, during the first couple gallons of fuel, the spraybar needed to be rotated a lot to get a good transition. After they have some run time, the spraybar has to be returned to its original "straight in" position which gives a superb transition. Stock out of the box it would blubber like a sloppy pig like this, but broke in good it runs great.
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