I go to start up my K2 buggy today . and the damn tires were rotating in the opposite direction there supposed to . What is up ? I shut it down . and did not try to start it again . I did not start the engine the wrong way . there is only one way it will go on my starter box . and only one way to hook up the battery for it , so the motor was also turning the correct way .
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Why is my buggy running in reverse ???!!!
- Thread starter Mr.Pink
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Buggyracer28
Hardcore RCTalk User
Or your starter box is wired backwards.... Its always possible.
digger
Hardcore RCTalk User
These little engines will run backwards. Even the 4-stroke plane engines. Just stop the engine. Start it again. At least I've had it on the aircraft.
Your starter box is probably turning the wrong way. Ya haven't hurt the motor.
Your starter box is probably turning the wrong way. Ya haven't hurt the motor.
mikeburgin
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would think it would have to be your difs
clutch wouldnt engage backwards
clutch wouldnt engage backwards
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ok good , as long as i did not hurt the engine . This is the first time it has done this . I have not touched the diffs since it was last running fine . I will start it up tomorow again .since now i know the engine is not being ruined . And no I can only hook up my starter box battery one way , so it is not running backwards . Thanks for the help . Later .
beason
Bash, Fix, Repeat..
yea it prolly started in reverse.. I've seen it.. and yes the clutch will enguage in reverse.. took off across the garage backware because we were expecting it to go forward and was holding it from doing so..
Just to keep the facts clear....mikeburgin said:
The clutch WILL engage just fine running backwards. doesn't matter if they are leading or trailing, the centrifugal force will cause the clutch to engage.
Just keeping things clean.
beason
Bash, Fix, Repeat..
thanks eddy for clearing that up for the second time lol i think we got it covered now..
I heard the back pressure can somtimes catch the piston in a certain angle on it's stroke and sent the crank spining the opposite direction....dunno how that one works but I saw mine do the same thing when the guy I was buying it from tryed to demo it in front of me....got a lil scared but shut it off and fired it right back up...it's funny to watch for a min.......
beason
Bash, Fix, Repeat..
kinda scary we were both like oh sh*t what happend?? there are even gasoline engines in the works that will do this on command.. makes for no reverse gears in the tranny.. i dont think it will fly though.. seems to dificult and could pose alot of problems..
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A gasoline engine will not run in reverse due to valve and ignition timing. An older diesel engine on a truck can start in reverse, and so can a 2 stroke nitro engine, but it won't run very well.
Ryan with savage
RCNT Official "Knobhead"
Yup, managed to get most if not all of my engines to run in reverse (not delibately mind you) from an OS V-o1B to a Collari and even my brand new new S7II.
They run like cr@p and I've never revved them when running backwards but its never seemed to do any damage.
They run like cr@p and I've never revved them when running backwards but its never seemed to do any damage.
beason
Bash, Fix, Repeat..
rolex that is why i stated "in the works" it is a new design (well new a few years ago) but i dont think it was practical enough to persue so they gave up.. it was in a popular science or something..
they designed an engine that they could alter the valve timeings and such to the point where they could slow it down and then reverse the movement.. but it took so long to get it to switch compared to just putting the vehicle in reverse that is was impractical and therfor not persued
they designed an engine that they could alter the valve timeings and such to the point where they could slow it down and then reverse the movement.. but it took so long to get it to switch compared to just putting the vehicle in reverse that is was impractical and therfor not persued
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For the most part, gasoline engines have remained unchanged because they do what they have to do, just the way they do it.
Remember the GM engine in the Cadillac some years back? It was called an 8-6-4 because it would adjust itself to run on 8 cylinders, 6 or 4, depending on how much pedal you gave it.
A year later, GM lost a fortune in a class action suit when they had to replace EVERY SINGLE 8-6-4 engine out there, with the standard Cadillac engine.
Remember the GM engine in the Cadillac some years back? It was called an 8-6-4 because it would adjust itself to run on 8 cylinders, 6 or 4, depending on how much pedal you gave it.
A year later, GM lost a fortune in a class action suit when they had to replace EVERY SINGLE 8-6-4 engine out there, with the standard Cadillac engine.
digger
Hardcore RCTalk User
Sometimes on a plane you can grab the spinner and the will go the right direction. I have throttled up and had them to reverse too.
The old diesel you were referring to, a Detroit? They were 2-strokes. Had valves, but just intake. I think. Still hear one of those noisy critters go down the road every once in a while.
The old diesel you were referring to, a Detroit? They were 2-strokes. Had valves, but just intake. I think. Still hear one of those noisy critters go down the road every once in a while.
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A perfectly tuned R/C airplane is often started by a reverse flip of the spinner. The piston goes in reverse against the compression, and it's enough to ignite it before it gets to the top of the stroke, and that starts it running in the right direction.
It's always easier to tell if a plane engine is running in reverse due to the direction of the air from the prop.
Digger, I'm not sure what kind of engines would sometimes start backwards. It's something a diesel mechanic told me many years ago when I was showing him a 2 stroke airplane engine.
It's always easier to tell if a plane engine is running in reverse due to the direction of the air from the prop.
Digger, I'm not sure what kind of engines would sometimes start backwards. It's something a diesel mechanic told me many years ago when I was showing him a 2 stroke airplane engine.
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