[gurps] Ver 1.1 TL6 Small Zeppelin

[Tracy Ratcliff]

On Jul 1, 2008, at 1:28 PM, Onno Meyer wrote:

>>
>
> According to VE40, ballast cost is subsumed in the gas price. Weight
> is not mentioned, but I'd assume that VE40 lists a 'net useful lift'
> (see below).
>

The WWII design system calls for ultralight tanks for ballast, so I  
put some in, then ignored filling them. BTW, the ballast tanks should  
be 1300 gal, which is close enough to the historical figure.

>> 384 or 388 kW for the aft prop?
>

388.


> Lifting gas is a propulsion/lift component ...
>

Noted, I'll change that.
>>
> As per VE75, the 'rigger' needs no crew station. The rules also
> require more riggers, but fewer maneuver crew, so it evens out.
>
> The stewards can work in the galley, too.

The crew rules for riggers are not good at all, and I knew I'd ignore  
them.

>
> That leaves power for a bit of electric lighting, etc.
>

In photos, there appear to be a few light bulbs scattered around the  
passenger gondola.

>>
>
> I would assume that ballast, including tanks, is subtracted from  
> useful
> lift. The balonets, otoh, are purchased as a sealed body.
>
>>
> Technically pods need no access space.
>

These do have access space, historically.

>>
>
> If your design is by any chance light, you could consider different
> material strengths for the body and pods.
>

I'm fairly tight on lift, and historically the pods at least were  
built very light.

>> Armor PD2 DR2 metal advance (Po1-Po4). PD1 DR1 nonrigid Bo.
>
> You need a seal. "advanced metal".


The rules on sealing and lifting gases are both confusing and produce  
absurd results.

"Lifting gas can go in a gasbag subassembly outside the vehicle, or in  
a sealed body or pod." I'm trying to model a gasbag inside a body. I  
can see requiring a sealed body for a "metalclad" where a gas-tight  
metal shell is both body and gas container. Applying a seal to the  
main body of the Bodensee would cost $20 million, 99.9 percent the  
cost of the vehicle.

I should probably do one more version with rules-as-written costs and  
an explanation of why to ignore them.