#    dist    sec    min/mile
1    205    45    5:49
2    209    46    5:47
3    200    46    5:59
4    203    46    5:58
5    201    48    6:22
6    200    47    6:12
7    311    71    6:19
8    312    70    6:11
9    304    75    6:34
10    303    76    6:42
11    401    98    6:29
12    403    97    6:24

The lion kingdom evolved a routine of increasing interval distances as the headwind slowed it down.  In this case, the headwind was weaker than expected & the 400's ended up faster than the 300's.  There's not enough power to hit 6 minutes in the headwind as previous robots did.  

The propdrive 5050 is believed to have the key to 6 minute pace intervals.  The weight increase could be manageable.  It would fit in the latest wheel design.  It only wouldn't fit in previous wheel designs which directly copied the dimensions of the lunchbox.

A pair was once $90 & after bideflation, was $120.  The lion kingdom worked out a way to pay so much money when larger motors in the form of a hoverboard would be cheaper.  It's all about saying the premium is for miniaturization.

There's still the idea of having large diameter motors on the outside, extending the container all the way to the bottom, & making the container narrower.  The electronicals & batteries could go inside the motors.  This idea could also involve extensions of the container inside the motors.

The most radical idea is having a single traction motor which wraps around the entire container.  It would require a tank tread to achieve the various bends.  The motor is shaped like an oval.  The problem is carrying the vehicle by the tire, mounting the camera on it, storing things which are taller than the motor.  It's not believed having a single motor passing down the middle of the container would be practical.

The trend is large, hollow motors with the container integrated in the empty parts of the motors.  It's believed these motors can be constructed out of electromagnets bolted onto a linear PETG framework & permanent magnets embedded into TPU.  Smooth sliding of the TPU over the PETG would take some creative bearings & seals.  Chinese do sell bare ball bearings without the races.

A gearbox or belt is just a way to increase the diameter of a motor, but compress it into a smaller area & make a lot of noise.

The leading candidate for increasing the speed is an aerodynamic nose cone.  The problem with a nose cone is it's going to cover the headlights.  It could be translucent PLA.  The headlight could attach to the front of the nose cone & the front could be on top.  The nose cone has to fold up & fit in the container.  It might work if it hangs from the top.