This has been done before_quite true at the end of the war it was felt rhat having the "big'"wheels of the bombers turning for landing would elliviate the spin up shock.....Pockets were installed to catch the airflow to spin the wheel...
Today gear wheels are smaller-no spinup shock-and the touchdown spinup is used to activate the spoilers(15mph)..
Having the wheel spin in flight would have a detrimental effect so a squat switch is also incorporated to dissallow airbourne GROUND spoiler operation until the aircraft had weight on the gear...
In the hydroplaning case,should the gear not spin up, either for failure of the system or too light a touchdown(greaser),once the weight is on the gear the spoilers are deployed manually.
The cases of B737 no spoiilers available were due to faulty squat switches,and the A320 cases were due to requiring too great a weight on the squat switch(reduced from 6ton -2.5ton)
