What's the price for ?

[lincpimp]

Originally Posted by ta_man

They are charging for having figured out the optimal timing for running spec motors on 1S LiPo.

The big thing for Carpet racers is now spec motors (typically 13.5 and 17.5) on 1S Lipo. This speedo has timing profiles optimized for those spec motors running 1S Lipo for oval racing. There is a big to-do about this because the optimized profiles supposedly were good for .1 to .2 seconds a lap at the "Ovalmasters" race.

Wow, I had no idea people were that dumb. Running 1s lipo? Why not make a real sport out of it and see how many people can run a 1hr race with 200mah? That would make for a fun spectator sport, car made out of paper moving at snail speeds to conserve energy... At least you could use a cheap speedo...

[ta_man]

Originally Posted by lincpimp

Wow, I had no idea people were that dumb. Running 1s lipo? Why not make a real sport out of it and see how many people can run a 1hr race with 200mah? That would make for a fun spectator sport, car made out of paper moving at snail speeds to conserve energy... At least you could use a cheap speedo...

They are not dumb. At least the 1S Lipo thing is not dumb. What it has done is allow the oval and road course racers to get the benfits of Lipo (and move away from NiMH technology) without either: a) having cars to fast to be controllable, or b) needing to run motors that are not readily available.

There isn't a lot of choice for pack voltages when using LiPos. Using the 2S lipos common in touring cars and 1/10th scale off-road cars makes carpet cars too fast for most people to drive even with the slowest motor available, the Novak 21.5. So by using 1S LiPos, they now have a selection of speeds that can accomodate entry level racers (17.5/1S) all the way to experienced drivers that want really fast cars (7.5/1S).

At my track the current record for 1S/13.5 pan cars is 90 laps in 5 minutes. or an average of 3.3 sec/lap. They are not slow by any means. They are averaging 23 MPH around an oval in a space 35ft by 60ft. Unless you have driven on carpet, you have no idea how fast these things can go when traction is essentially unlimited and you don't have to lift for the corners.

Do you have a car that can make a U-turn in the width of the typical driveway at 20+MPH? And do it 180 times in 5 minutes? 1S Lipo isn't dumb just because you do not have a car where 1S is useful.

[lincpimp]

Originally Posted by ta_man

They are not dumb. At least the 1S Lipo thing is not dumb. What it has done is allow the oval and road course racers to get the benfits of Lipo (and move away from NiMH technology) without either: a) having cars to fast to be controllable, or b) needing to run motors that are not readily available.

There isn't a lot of choice for pack voltages when using LiPos. Using the 2S lipos common in touring cars and 1/10th scale off-road cars makes carpet cars too fast for most people to drive even with the slowest motor available, the Novak 21.5. So by using 1S LiPos, they now have a selection of speeds that can accomodate entry level racers (17.5/1S) all the way to experienced drivers that want really fast cars (7.5/1S).

At my track the current record for 1S/13.5 pan cars is 90 laps in 5 minutes. or an average of 3.3 sec/lap. They are not slow by any means. They are averaging 23 MPH around an oval in a space 35ft by 60ft. Unless you have driven on carpet, you have no idea how fast these things can go when traction is essentially unlimited and you don't have to lift for the corners.

Do you have a car that can make a U-turn in the width of the typical driveway at 20+MPH? And do it 180 times in 5 minutes? 1S Lipo isn't dumb just because you do not have a car where 1S is useful.

Well, I could go into the fact you guys are racing with some of the worst designed motors on the planet... But I guess I can skip that part.

Anyways, 1s lipo is dumb when you could run 3s lipo, and a motor with 1/3 of the kv and do the same thing. Plus you could run a lighter battery with less capacity and have less anp draw and voltage drop. If the traction really is unlimited more power can be used.

I do not race, and have not raced on carpet, but I do know electric rc. I understand that you guys are stuck with roar (or whatever) rules and that you can only use certain motors. The fact you are working around this by using 1s lipos (and most likely not maxamps) that are very high quality does show that there are people with some creativity. The principle of what you are doing is a bit off, and the rules need to be changed to allow for that. Just making stuff work is not always the best way to go.

This is why I do not race. The rules can never keep up with the technology (as indicated by this 1s esc that has an advantage) so as usual the deepest pocket usually wins. I am glad to hear the smarter people are making do with a much cheaper esc (mmp) but that does not change the overall issue I have.

As long as you are having fun nothing I think really matters!!! It is just a hobby and should provide some relaxation! Please do not take my comments as anything other than my skewed beliefs, and I hope I have not insulted you in any way, as that was not my intention.

[lutach]

I raced my 12th scale with 4 cell NiMH and saw the 1S lipos guys being too light. I saw traction rolls and also a guy hit my car twice and suffered greatly. He blamed me for it of course (Track owner lol). The lipos are great as it provides the run time and punch doesn't fade away like the NiMH's does as I was just slowing down as the last few laps went by. I'm thinking of getting a few LifePO4 cells that are the same size as a SUB-C and run a 2S2P configuration. The maker of the cells has said the cells have shown to hold above 3V at close to 20C for the power cells and above 3V at around 10C for the energy cells. At 6V, I think LifePO4 should be a good choice for 12th or 10th scale pan car.

[snellemin]

Originally Posted by lutach

At 6V, I think LifePO4 should be a good choice for 12th or 10th scale pan car.

I do run 2s2p A123 in my Genx 10. Plenty of power for a 1/10 2wd car.

[_paralyzed_]

I dunno what the big deal is? it said right in the ad it was a low price....

[lutach]

Originally Posted by snellemin

I do run 2s2p A123 in my Genx 10. Plenty of power for a 1/10 2wd car.

Sub-C size would fit better I think. I have to see how mature the sub-c size life cells are to bring some in.

[snellemin]

Originally Posted by lutach

Sub-C size would fit better I think. I have to see how mature the sub-c size life cells are to bring some in.

They would fit better. The A123's are Ginormous.

[ta_man]

Originally Posted by lincpimp

Well, I could go into the fact you guys are racing with some of the worst designed motors on the planet... But I guess I can skip that part.

Anyways, 1s lipo is dumb when you could run 3s lipo, and a motor with 1/3 of the kv and do the same thing. Plus you could run a lighter battery with less capacity and have less anp draw and voltage drop. If the traction really is unlimited more power can be used.

I do not race, and have not raced on carpet, but I do know electric rc. I understand that you guys are stuck with roar (or whatever) rules and that you can only use certain motors. The fact you are working around this by using 1s lipos (and most likely not maxamps) that are very high quality does show that there are people with some creativity. The principle of what you are doing is a bit off, and the rules need to be changed to allow for that. Just making stuff work is not always the best way to go.

This is why I do not race. The rules can never keep up with the technology (as indicated by this 1s esc that has an advantage) so as usual the deepest pocket usually wins. I am glad to hear the smarter people are making do with a much cheaper esc (mmp) but that does not change the overall issue I have.

As long as you are having fun nothing I think really matters!!! It is just a hobby and should provide some relaxation! Please do not take my comments as anything other than my skewed beliefs, and I hope I have not insulted you in any way, as that was not my intention.

Some people like to race. In order to do that we need two things: Rules and people to race with. The wye-wound 2 pole, iron stator motors typified by Novak and others may be a bad design, but they are good enough to race with when everyone is using that same style of motor. "Just making stuff work" is what keeps people around who don't want to spend money on the latest and greatest. So that's what the racing organizations do - make stuff work.

It doesn't really matter if rules keep up with technology. In fact, for the people who don't have deep pockets, it is better that the rules don't keep up with technology because old tech is usually less expensive that new tech (MMP being an exception).