Hello
...First of all- it was great to come over to DEMA, and TE-20 event and meet some of you.
As i am in the Seacraft project for quite a bit of time, please see below some of the topics discussed with meritoric input about them.
First of all- as DPV testing and comparison is extremely depending on the testing conditions, it is very hard to really compare scooter parameters. We did quite a lot of real testing, and sometimes data stated by manufactures is simply speaking, poetry and fairy tales. We did all of the testing according to most accurate test standards (internal loggers, 500m 50m calibrated test lanes, standardised drag of diver and standarised diver), however... it seems would be best to make a
http://www.tahoebenchmark.com/ valid for 2019
Some answers for your questions/observations:
1. Time lock- a feature of "dropping the gear" to 0 after a predefined time. It can be programmed 3-60 seconds, and it's intention is runout prevention, in case of emergencies (and not switching off the scooter). I personally keep it low- on 5s. As no DPV has such feature, many people don't love it at start, but with some hours start to appreciate it much. Just mind, that double tap in 0.6s (fast) gets you back to previously driven gear.
2. "Slow ramp up". With magnetic drive we use (engine full in the water, no transmission), it's steering is somehow not trvial and need to be developed by ourselves. Up to mid 2019, there was only "smooth" ramp available, but in software 2.0 (compatibile with all previous scooters) we implemented new driving mode with almost immediate full thrust output.
More info:
Model 2020 released!
Depending which unit you test, all can be upgraded- you might have had it, or not.
3. Reverse can be easily turned off in settings
4. There unfortunatelly were no chances for side-by-side tests on last event. Seacrafts were never built for speed (this is mostly a "fancy" part- once you get above 80m/min, "burning a lot of Watts" to move non-hydrodynamic optimised object through the water. Actually, Seacrafts are still one of the fastests DPV's, but for speed we built:
Most key-goal was drive efficiency, and keeping a lot of burntime and power in small scooter (not hardest to build biggest scooter on the market
)
3. Comparing range's with Genesis what some of you speak about. (cool construction! And only one around which is built with some more modern engineering and thinking behind)
In 15,9kg Future 1000, there is 1000Wh of battery. In 15,2kg Genesis 600 there is 675Wh (website data), and this is more less same weight class.
Future 2017 series was burning ~171W to move 2x12l backmount diver in drysuit with 46m/min speed
Genesis from Tahoe report (Jon- let us know if this is already upgraded) was burning ~165W for 45m/min speed, with single-tank diver.
As drag of single/double tank is different, hard to compare, but in the same weight class Seacraft simply has 40% more battery inside, and i believe a bit smaller power intake.
Also, we need to do 2020 model through tests, as there will be some further improvement there.
4. As post-swirl stator is made on airfoil shape, it's "counterforce" (actually it is gentle direction of water flow, which also add more thrust) is always equal to torque at all speeds. It is actually zero torque (
)
Any topics more i might know the answers and help- let me know