This is after the fact as it happened yesterday but it did worry me a bit.
While breaking in the engine the RPM's did not remain at a slow just turning
the wheels rate, I don't know what should happen but it kept creeping faster
and faster. Maybe wheel momentum? The temp did go up to 230 F at one point
and I just put resistance against the wheels to slow them down but toward
the end of the tank it just wanted to go,go,go. The truck (Savage 25 nitro)
is running very nicely and is quite easy to drive. At the first stop and go
tank as part of the break in it had some engine stoppages that I think where
due to the build-up of oils in the combustion chamber and exhaust that just
had to clear itself? I am on the fifth tank now and it runs just fine,
switches into second with impressive smoothness and just screams off!
Sometimes, when the truck turns, the tires look like they are going to peel
off of the rims!!
Is this "vertigo" feeling normal? It takes about an hour to get over the
feeling from driving around and around, watching the truck and the scenery
go by for ten minutes. Anyone else get this?
--
Steve
>and I just put resistance against the wheels to slow them down
>but toward the end of the tank it just wanted to go,go,go.
When the fuel tank gets low, the engine is more likely
to "lean out". More air enters the engine through the
fuel inlet and changes the air/fuel mixture. There's not
much you can do about it (other then fill up the tank).
Even if you do refill the tank, it takes a while for the
engine to return to normal...
>due to the build-up of oils in the combustion chamber and
>exhaust that just had to clear itself?
Yes, that's called "loading up". Once you get the engine
broken in, the truck should be able to set still with the
engine idling for ~5 seconds and still take off without
bogging down... It won't hurt if the engine bogs down,
it's just a sign the engine is running too rich (MUCH
better than too lean).<G>
>Sometimes, when the truck turns, the tires look like they are
>going to peel off of the rims!!
If one wheel comes off the ground, the differentials will
try to send "all" the power to that one wheel. When a wheel
is off the ground and you stay on the throttle, it's quite
possible to separate the tire from the rim... I'd suggest
you always have some superglue available when running the
truck.
>Is this "vertigo" feeling normal?
No, I've never seen/heard of that happening before in R/C.
I know many people have that feeling while playing first-
person-shooter video games, though... Are you running the
truck in and out of shadows? If so, that could possibly
be the cause. Try running in a big parking lot when no
cars are there (ie: school, church) to see if you get the
same feeling.
Later,
Scott
sul - 27 Jul 2004 12:54 GMT
Is this "vertigo" feeling normal?
>No, I've never seen/heard of that happening before in R/C.
>I know many people have that feeling while playing first-
[quoted text clipped - 3 lines]
>cars are there (ie: school, church) to see if you get the
>same feeling.
Not sure if this is the same thing you are feeling or not. After running
in a group of 6-7 rally and touring cars for about 15 laps or so on a
twisty course, and concentrating so hard on the happenings, I sometimes
walk away sorta "out-of-it". I just chalk it up to the body relaxing
after the extremely competitive fun. :-)
sul
Steve & Chris Clark - 27 Jul 2004 23:39 GMT
That would be it, glad to hear you get it too! Thought I may have been
having a vascular incident ;-))) I made a drivers platform that is about
six foot off of the ground and the track is in an area that is about
130'x130' and the bendy part is right after the thunder alley part. Perhaps
the quickly moving background passing while focused on the car causes this?
I think I will make the track width a couple of feet wider.
--
Steve
> Is this "vertigo" feeling normal?
> Not sure if this is the same thing you are feeling or not. After running
[quoted text clipped - 4 lines]
>
> sul
Jonathan Hodgson - 29 Jul 2004 19:58 GMT
> That would be it, glad to hear you get it too! Thought I may have been
> having a vascular incident ;-))) I made a drivers platform that is about
> six foot off of the ground and the track is in an area that is about
> 130'x130' and the bendy part is right after the thunder alley part. Perhaps
> the quickly moving background passing while focused on the car causes this?
> I think I will make the track width a couple of feet wider.
6' is the minimum sensible track width; 8' is better and 10' helps,
though is probably not necessary unless you're running 10 or 12 cars
together.
Have fun!
Jonny