RE: worst engine ever

RE: worst engine ever
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RE: worst engine ever - 2/26/2007 3:37:37 PM

JeffH

Posts: 596
Joined: 1/17/2002
From: Carrollton, VA, USA
Status: offline

My personal worst engine was an OS .46 SF ring. That engine had something "off" in the metalurgy or something. I could only fly it about 5 times before I would have to tear it down and clean the piston and liner. I used different fuels, glow plugs, props all to the same result. I soaked the parts, I steel wooled them, 600 grit papered the sleeve....nothing helped. Finally I just gave up on it. The best engine I had would be several different ones. I have an OS 1.08 that only quit three times in 5 years of service. The first flameout was due to a plug gave up. I landed in the beans about 3 foot short of the field, no damage at all. Next flight, quit again....hmmmm thats odd. Next flight same thing...clunk flipped forward on agricultural landing. Shook it back where it should be, NEVER quit again. I think I put 2 rings and 3 sets of bearings in that motor I flew it so much. I could tell when the ring was worn out byt the fact that I had to move the idle mixture. It never ever needed moving from it's factory setting until the ring wore. I replaced the ring, and put the idle right back where it was. Perfect engine.
I had two different Enya 40s that were equally as robust. One was an SS 40BB and the other an old .40TV. I had a pipe on the TV and ran that sucker to about 15,500 on the ground for 3 years straight. I finally just quit flying the plane it was on. It still ran great when I stopped. The BB was the same way. I simply got bored of those planes and that size plane.

(in reply to Hobbsy)

RE: worst engine ever - 2/27/2007 12:59:07 AM

Posts: 182
Joined: 12/24/2003
From: stockton, CA, USA
Status: offline

I am always a bit surprised to hear anyone say that didn't just love their HP VT 21. I liked mine so much I bought a 2nd! I find it to be easiest engine to get along with of all my small four strokes, that includes: OS FS20, OS Surpass 26, OS Surpass 30, Magnum 30, Saito FA30 (open rocker), Saito FA30S, Enya 35 4C (open rocker), Enya 40 4C (also open), Kalt FC1 (an open rocker .45,)

My best running OS is the FS20, and if you need lots of power and speed, there is nothing like the Saito FA30S!

As far as engines I never liked, I had a Norvel .061 AME that was hard to live with until I rebuilt it with the tamer "Big Mig" cylinder set. Now I like it fine.

< Message edited by misfitsailor -- 2/27/2007 1:01:59 AM >

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(in reply to JeffH)

RE: worst engine ever - 2/27/2007 1:51:39 PM

Posts: 7405
Joined: 1/21/2002
From: Acworth, GA, USA
Status: online

quote:

ORIGINAL: typhoonfury

70'S MCOY with plastic head, it looked like plastic, no compression from the start

junk

Was it a black head? If so it had a dykes ring. It had the same compression as the K&B with the dykes ring. It had lots of power, but was hard to restart when hot. Starting cold was not a problem, but you had to give it a good flip.

(in reply to WhiteRook)

RE: worst engine ever - 2/27/2007 3:41:04 PM

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Joined: 10/9/2002
From: Austin, TX, USA
Status: offline

I have not raced with the black head McCoy 35 but others have. The K&B 4011 and Series 75 35 are instant hot starters if you know how. Same is true of the ABC K&B 5.8. It's all in the wrist!

Should mention that CL racing includes mandatory pitstops with refuling and restarting.

(in reply to Sport_Pilot)

RE: worst engine ever - 2/27/2007 4:58:53 PM

Posts: 1043
Joined: 6/22/2004
From: Where I park it, BC, CANADA
Status: offline

A Davies Charlton 0.8cc [049] sized glow engine. I think it was called a Bantam. It refused to start until driven by an ELECTRIC DRILL. It then slowed down to running speed and stopped instantly when the glow supply was removed. The exhaust was black with grey bits [ always a bad sign ]. Eventually it could be persuaded to start on a prime of diesel fuel but only from cold and mustered just enough power to get a 30" FF airborne.

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RE: worst engine ever - 2/27/2007 6:27:00 PM

Posts: 1170
Joined: 12/1/2002
From: Lake Cowichan, BC, CANADA
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Hello Hobbsy; The carb was a huge alloy block with needles on each side. That looks like a perry carb on the 6.5 cc engine.

(in reply to Hobbsy)

RE: worst engine ever - 2/27/2007 8:05:19 PM

MJD

Posts: 1489
Joined: 5/27/2003
From: Orangeville, ON, CANADA
Status: offline

quote:

ORIGINAL: CoosBayLumber

Well, a McCoy engine may have been hard starting, but least they did after 20 minutes of cranking.

My worst was any A/C or marine engine on the OK Cub lineup. I could get them to run at home, but once that engine left the backyard, it never started, ever again.

Wm.

It's odd, I had two .19 RedHeads and had no problem starting either one, and they ran pretty well. Yeah, they're clunky and the slop was impressive, but they started and ran and gave me a fair amount of ukie time. I would say the last time I ran one was 1975-76, so I should unearth them and put 'em on the test stand. Who knows, I might change my mind after reminding myself..

(in reply to CoosBayLumber)

RE: worst engine ever - 2/28/2007 1:17:24 AM

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Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline

quote:

ORIGINAL: MJD

quote:

ORIGINAL: CoosBayLumber

Well, a McCoy engine may have been hard starting, but least they did after 20 minutes of cranking.

My worst was any A/C or marine engine on the OK Cub lineup. I could get them to run at home, but once that engine left the backyard, it never started, ever again.

Wm.

It's odd, I had two .19 RedHeads and had no problem starting either one, and they ran pretty well. Yeah, they're clunky and the slop was impressive, but they started and ran and gave me a fair amount of ukie time. I would say the last time I ran one was 1975-76, so I should unearth them and put 'em on the test stand. Who knows, I might change my mind after reminding myself..

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

The engines that used to give me fits when it came to starting were the Cox .09 and .15 size engines. One was a Sportsman and I think the other was a Medallion. I could not seem to master those two. Once started, they ran just fine. But getting them started took a while. This was back when I was flying control line in the mid Sixties.

Ed Cregger

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(in reply to MJD)

RE: worst engine ever - 3/26/2007 11:08:51 PM

Posts: 5
Joined: 2/13/2007
From: Adelaide, AUSTRALIA
Status: offline

The worst Engine I have Ever owned was a Thunder Tiger 40 (mid 80's) First day out the muffler broke on the ground - broke off on one lug!!! The shop would not give me warranty so I had a club member have it welded The engine ran fine. As I was a Learner at the time I landed the Model a bit hard minor damage to the model but the carb broke off the mount on the crank case !!!

That was that so I Bought a Used OS 40 of a Club member to replace it.

I have Sworn Never to Own a Thunder Tiger or Magnum engine, I have always Bought OS or Super Tigre engines Since. I dont think OS Knows how to make a bad Engine

Some of Engines I own

OS 15 Max - Great C/L Engine
OS 20 MAX R/C Runs well not very powerful
OS 25 Max FSR This is a wonderful Engine Runs and Runs Never Stops until no Fuel Left !!!
OS FS20 Amazing four Stroke Runs like a Swiss watch Flew a Oldtimer for 45 mins on a 6 oz tank !!!
OS 40 Max 1970's vintage so good I wore it out Learning to fly
OS 50 FSR Very powerful for its size runs smooth and strong
OS 60 Max 1991 Model Nice Engine goes very hard on a tuned pipe

Supertigre 29S Ring great Engine Has the Power of a old 40 likes a Tuned Pipe
Supertigre 40x Pylon the mos powerful 40 I have ever owned
Supertigre G90 Haven't run it yet looks well made for a Chinese Engine

Saito 80 GK I just bought this used It runs fine need to be flown in a plane

(in reply to JeffH)

RE: worst engine ever - 3/27/2007 1:49:28 AM

Posts: 4590
Joined: 7/21/2005
From: Greensboro, NC, USA
Status: online

Some of those old budget C/L engines run pretty well.

I have one particular K&B Torpedo .35 Green Head that had a bent piston skirt when I got it second hand. I took a pair of needle nose pliers and bent it back to a round shape by eye, replaced the head and backplate gaskets with automotive paper gasket material, squirted some fuel in the exhaust and it fired right up by hand. My McCoy Red Heads also run very well. Priming through the exhaust like you do with OT sparkers seems to be the trick for me, anyway.

The one engine I've owned that I simply could not get to run without glow heat was a Cox R/C .09. All of my other Cox engines are a pleasure to run. The R/C .09 was only made for a few years in the early '90s. Maybe there's a reason why.

(in reply to Johnkpap)

RE: worst engine ever - 3/27/2007 4:58:32 AM

Posts: 287
Joined: 8/1/2005
From: Minneapolis, MN, USA
Status: offline

Strange. I must say that my AP .09 is probably one of my best running engines. I've got about 20hrs of run time on it and it idles so low it's amazing.

quote:

ORIGINAL: on pipe

One of the newer offerings that gets my vote is the AP .09. The one I had seemed to go past its prime sometime during break-in and not have the compression it did when new. It is (was) very heavy also.
Ross

(in reply to on pipe)

RE: worst engine ever - 3/27/2007 6:10:01 AM

Posts: 7437
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline

quote:

ORIGINAL: JeffH

My personal worst engine was an OS .46 SF ring. That engine had something "off" in the metalurgy or something. I could only fly it about 5 times before I would have to tear it down and clean the piston and liner. I used different fuels, glow plugs, props all to the same result. I soaked the parts, I steel wooled them, 600 grit papered the sleeve....nothing helped. Finally I just gave up on it. The best engine I had would be several different ones. I have an OS 1.08 that only quit three times in 5 years of service. The first flameout was due to a plug gave up. I landed in the beans about 3 foot short of the field, no damage at all. Next flight, quit again....hmmmm thats odd. Next flight same thing...clunk flipped forward on agricultural landing. Shook it back where it should be, NEVER quit again. I think I put 2 rings and 3 sets of bearings in that motor I flew it so much. I could tell when the ring was worn out byt the fact that I had to move the idle mixture. It never ever needed moving from it's factory setting until the ring wore. I replaced the ring, and put the idle right back where it was. Perfect engine.
I had two different Enya 40s that were equally as robust. One was an SS 40BB and the other an old .40TV. I had a pipe on the TV and ran that sucker to about 15,500 on the ground for 3 years straight. I finally just quit flying the plane it was on. It still ran great when I stopped. The BB was the same way. I simply got bored of those planes and that size plane.

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

What were you burning for fuel in that ringed .46 SF? I have never "had" to clean an engine in order to get it to run in nearly 50 years of glow engine operation. I have an OS .46 SF ring, but I haven't ran it yet. Maybe soon.

But, all we have to go by are our own experiences. I wasn't there, you were. I'm glad your 1.08 ran okay.

Ed Cregger

_____________________________

Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

(in reply to JeffH)

RE: worst engine ever - 3/27/2007 2:00:01 PM

Posts: 7405
Joined: 1/21/2002
From: Acworth, GA, USA
Status: online

quote:

I dont think OS Knows how to make a bad Engine

The .46 and .91 FX come to mind. I have had bad experiances with good engines as well as cheap. The main differance I see with OS and other brands is quicker break in. Followed by faster wear out.

(in reply to Johnkpap)

RE: worst engine ever - 4/25/2008 7:55:56 PM

firstplaceaviator

Posts: 559
Joined: 2/21/2004
From: Wadsworth, OH, USA
Status: offline

Nobody mentioned the Malony 100? That is the worst engine I ever owned. I suppose they were OK for a Cub type airplane. But, they had a very low power to weight ratio, and I had to disassemble and clean the motor when I received it because there were metal shavings (from the factory) in the engine and the carburetor! That engine is followed by a Fox .74 that I owned... Another worthless, powerless POS!

(in reply to Sport_Pilot)

RE: worst engine ever - 4/25/2008 8:55:10 PM

Posts: 297
Joined: 5/14/2006
From: Stockholm, SWEDEN
Status: offline

My worst engine was a Fuji 19 that I had in my trainer 1977, once it got stated it was powerless.
Now when I got it out again after I got older I got it to run real good and it is a powerhouse.
The recipe was to remove all the shimes and from a 9x4 to a 8x6 it.s now a super good engine.

Take care.

(in reply to SSGSPEEDMAN)

RE: worst engine ever - 4/25/2008 9:16:01 PM