I interpret the text for Batteries on THB p. 241 as follows:
Originally posted by gentloser:
OK I have a T20 rulebook, calculator, pencil and scrap paper to hand. Let's make a Grav Bike.
Design Philosophy - this Grav Bike is going to be a sturdy machine that might be carried as a 'dirtside runabout' by a Scout.
Chassis - Size 250 (vl), Cost 250cr, Build time 2 weeks 1 day, Thrust req'd 0.25 per 1kph, Base Armour 2.5 (vl)
Control System space - because the rider is on rather than in the vehicle I have to provide only 25vl space at a cost of 125cr.
Because this vehicle might get a bit of 'rough use' I will put on a bit of Armour (AR 1). I will assume it is being built in a TL 12 facility. So base armour is (2.5vl x 2) x2 = 10vl to get AR 1. Cost is 3000cr + 9x10 = 3090cr.
Chassis configuration - I will use the Standard Chassis to keep the cost down.
Drive Train - Grav. Each DTU provides 100TH per EP and takes up 4vl. I need 0.25TH per kph, so I need to fit 1 Grav DTU at a cost of 46,000cr and taking up 4vl space. The max chassis speed is 320kph and we have enough power to go 400kph, better be careful with that throttle Mr Scout
Power Plant. I'm going to use Advanced Fuel Cells which will provide 1EP, take up 1.5vl space and cost 100cr. I am going to fit a fuel tank 8.4vl which will provide enough fuel for 1 week continuous use (168hours x 0.05)
Battery - I will fit a 5EP modern battery at a cost of 150cr and take up 0.2vl (you never know when you will want a few extra hours power).
Passenger and Crew facilities - I will fit a saddle big enough for the rider and 1 passenger. 10vl x 2 = 20 vl and costs 50cr.
Winch - I will fit a 10 Strength winch for a cost of 100cr and space 2vl.
Weapons - I will not fit any weapons on this bike.
Electronics - I could use some headlights. I will fit 2 light units at a cost of 10cr and space 0.4vl
A radio is going to come in handy. I will fit a 2-way radio with a range of 500km, cost 300cr and space 2vl.
Agility Rating - I don't have any excess EP (the battery is purely a back up in case the fuel runs out) so no adjustment to agility.
AC = 10 + 0 + 1 + 0 = 11
SI = (250-22)/30 = 7.6 rounded to (7 x 1.5) + 10 = 22.5
Max speed 320kph, acceleration 32kph
Range = 160 x 168 = 26,880km
Total Cost = 51,075cr
I could add a few extra fuel cells to give extra EP an increase agility and maybe a weapon mount. There is certainly room to spare for some 'custom mods), I might even fit some fluffy dice
Hope this helps, and if anyone spots any mistakes please let me know. This is my first vehicle design just using the T20 mrb.
No. One vl is 0.01m^3 (see p. 233). One dt is 13.5m^3. Therefore one dt is 1350vl (or 1400vl)
I don't think so. Ship EP should be much greater in power to vehicle EP. I think it is a factor of 10 vehicle EP per 1 Starship EP. page 282 states that when instaling a ships computer (from vehicle scale) to divide EP by 10. Is this
That's easy.
Evening Baron, I think you have got it, and a nicely worked creation too, well done! I see only one possible error on a quick look, the remote control system is I believe too small. The design rules require 10% of the chassis vl, in this case 2,000vl not 200vl, yes?Originally posted by Baron Saarthuran:
Please critique me, My Lords, but,
By Jove, I think I’ve got it!
A few questions…
Is 1000vl a ton, as in Starship displacement ton?
Is an EP for a vehicle the same EP that is generated by a Starship’s power plant?
eh?
The table on P241 differs from the text. I went with the costs from the text, 35cr per unit. Is this in the errata? </font>[/QUOTE]
No. One vl is 0.01m^3 (see p. 233). One dt is 13.5m^3. Therefore one dt is 1350vl (or 1400vl)
I don't think so. Ship EP should be much greater in power to vehicle EP. I think it is a factor of 10 vehicle EP per 1 Starship EP. page 282 states that when instaling a ships computer (from vehicle scale) to divide EP by 10. Is this
That's easy.
[/QUOTE]
I think the best way to think of batteries (or other possible stored power systems) is in total EP. In this case you have a 5.0 EP storage capacity. You can use that as 1.0 EP continuous power for 5 hours, or 2.0 EP continuous power for 2.5 hours, or any other division. You could also use it as 1.0 EP for 1 hour each day and call it a 5 day supply. I think the maximum output is the unit bought, in this case 5.0 EP and it would take an hour to drain at that level of use. The basic batteries listed are not imo capable of a discharge rate faster than 1 hour.
I think the best way to think of batteries (or other possible stored power systems) is in total EP. In this case you have a 5.0 EP storage capacity. You can use that as 1.0 EP continuous power for 5 hours, or 2.0 EP continuous power for 2.5 hours, or any other division. You could also use it as 1.0 EP for 1 hour each day and call it a 5 day supply. I think the maximum output is the unit bought, in this case 5.0 EP and it would take an hour to drain at that level of use. The basic batteries listed are not imo capable of a discharge rate faster than 1 hour. </font>[/QUOTE]
Ah, my befuddled mind missed that. You wanted a specific answer for that design. Yep looks like the design he has is powered with 1EP so the battery should be good for 5 hours operation, more than enough to get home at 400kph unless you're wayyyyy out there
