The problem with speed records is there is a set course demension you have to use depending on what record your trying to break. Add on top of that the countless timers you need on the course and the paperwork you have to go through in order to set up an attempt. After all this is done, speeds are averaged out after a number of runs and atleast 2 of the timers on the course have to be with in like a 1/50th of a second or so of each other to be considered accurate! This is exactly why when you look up the offical "record" for something it is actually quite slow. For example I remember the fastest rc aircraft is only recorded at like 150mph in 1984! or something close to that. The reason also being because of the size of the course is too small and trying to run a turbine through it is impossible because it actually goes TOO fast. The course is set up something like a 4 pylon course that is 800meters long and you have to fly it perfectly with no cuts at all. Now, I don't know if there might be straight line records out there somewhere but I haven't seen any.This is all something I remember reading in a rc magazine awhile back...I'll have to try and find it. As for cars I remember reading awhile back that 124mph was set by a little 1/12 onroad electric with something like 24 or 36 cells on it. I saw a video of a HPI super nitro clocked at 109mph too. Anyway that is just my 2cents..I'm sure someone else will have something else to say about this.