Bullet class transport

[Frostvarg]

This is a 400 tons solomani design. The old Harland and Wulf shipbuilders on Terra designed this as a main cargocarrier between orbit and dirtside. A payload of 250 Tons made it possible for the ship to empty the hull of a Subsidized merchant in one go. It was a popular ship on large spaceports.

four of these ships are aboard the worldbuilder class heavy scoutship. there it has the mission to carry colonyequipment from orbit to dirtside.


Bullet-Class Commercial Transport


General Data
Displacement: 400 tons Hull Armor: 28
Length: 27,5 meters Volume: 5 600 m3
Price: 50,84 MCr Target Size: S
Configuration:Streamlined Box Tech Level: 15
Mass (Loaded/Unloaded): 4 102,95/ 3 975,10




Engineering Data
Power Plant: 265 MW Fusion Power Plant, 1,0 year(s) duration ( 26,5m3 fuel)
Jump Performance: None
G-Rating: 1G HEPlaR (200,0 MW/G) , High-Efficiency CG (40 MW)
G-Turns: 72, 25,0m3 fuel each
Maint: 159

Electronics
Computer: 3xTL-15 Standard (0,6 MW)
Commo: 1xTL-15 10 hex Laser Commo (0,15 MW ,0 Backups)
, 1xTL-15 10 hex Radio Commo (10,00 MW ,0 Backups)
Avionics: Imaging EMS, inertial/gravitational positioning, IGS positioning
Sensors: , 1xTL-15 4 hex AEMS (9,0 MW ,0 Backups)
, 1xTL-15 2 hex PEMS (0,04 MW ,0 Backups)
, 1x5 m Fixed PEMS Antenna
ECM/ECCM:
Controls: Bridge with 2 bridge workstations, 0 normal workstations,


Armament
Offensive:
Defensive:
Master Fire Directors: None

Accommodations
Life Support: Basic Life Support (0,38 MW)
Gravitic Compensation: 6 G. (2,8 MW)
Crew: 2 (1xManeuver, 0xElectronics, 1xEngineer)
Crew Accommodations: 1xSmall Staterooms (0,0005 MW)
Ship's Lockers for 2 crewmembers
, Minimal Galley
Cargo: 3 360 tons of cargo (240 dTons), 10xlarge hatch missiles in magazine
Food Storage:None
Small Craft and Launch Facilities: None
Air Locks: 4

Notes
Total Fuel Tankage: 1 826,5 m3 (130,5 dTons).
Crew requirements are calculated by using 'Original FFS' crew model.
0,2 MW power surplus

 

[robject]

[...] four of these ships are aboard the worldbuilder class heavy scoutship. there it has the mission to carry colonyequipment from orbit to dirtside. [...]

That image alone is worth the entry...

 

[Whipsnade]

That image alone is worth the entry...

Robject,

I'll guess the image you're seeing isn't the one I'm seeing?

A heavy shuttle is undoubtedly useful and this is a very good design, but...

... where is it going to land on a colony world? How is it going to land on a colony world?

There's a current thread on the boards calculating the ground pressures produced by the landing feet of various canonical ships and the types of materials that would then be needed for runways, hardstands, parking aprons, and the like.

This shuttle relies on thrust solely for flight, no contragrav lifters are installed, so where is it going to land? Is the first infrastructure a colony world builds runways, hardstands, and parking aprons suited for a Class A port?


Regards,
Bill

 

[Frostvarg]

ok, so it probably needs some CG lifters. this is the reason i posted this here. i need the feedback on these designs. since im working on the deckplans for the 175000 tons worldbuilderclass ship i started with its carried craft.

back to the drawingboard then

 

[far-trader]

Depends, could be made for water landings. If it floats. Any world worth colonizing should have ample open surface water as a feature and it's where you'll want to build that first settlement as well.

For that matter if it's a single use lander it doesn't even need thrusters or a power plant nor fuel if it's a lifting body glider

So my 2Cr for what it's worth, keep the background of the H&W Shuttle but for the purposes of the colony lander have it bought cheap near the end of it's life, the drives, powerplant, and fuel stripped, and used in a single use role to land even more colony supplies.

Er, somethings not adding up. Just looking at the extra cargo capacity gained I notice you have 130.8dtons of fuel, which with 250dtons of cargo is just over 380dtons, out of a total 400dtons of hull. I think the amount of fuel is high if I recall FF&S though if not then you're really over tonnage I suspect. In any case a starport dedicated shuttle wouldn't need that much fuel as it can easily refuel as required.

I'd also question if 1G of HEPLAR is enough for the shuttle role. Larger planets would mean it can't land or take off, at least not without being an airframe and having a long runway, especially landing heavy.

EDIT: p.s. Whoa! 17,500dtons for the Worldbuilder! OK, re my above musings, if the shuttle were single use you'd probably need a few more than the 4 you were going with to land all the gear. Unless a lot of that is colonists and you have actual (smaller) landing craft (suitable for on world and in system transport as well) dedicated to people and special handling gear.

 

[Whipsnade]

back to the drawingboard then

Frostvarg,

Whoa there Hoss! Don't throw it out so fast.

I noticed something that didn't make it useful for colony missions, but that doesn't mean it isn't useful in other roles. You could have a frontier contragrav version modified from the "flying" version used in the core. On the frontier is carries less cargo but can touchdown on sufficiently firm ground while in the core it uses the long runways and hardstands I wrote about.

Don't throw out the baby or the bath water here. We're just talking about tweaks.


Regards,
Bill

(Edit: Dan's catch will need to be fixed, but that's a tweak.)

 

[Frostvarg]

single use are out of the question. this ship should be built to ferry cargo from highport to downport and from ships in orbit to port. its role in the worldbuilder class are a secondary use where the designers of the worldbuilder took an existing design and used it aboard there design.

i used an old excellsheet for the design and that shows a volume of 5600 m3 and when im finished i have used 5560 m3 of those. maybe something are wrong in the calculations. maybe i should test the design by doing it by hand from the book.

 

[far-trader]

Ditto Bill's sentiments

We aren't so much dictating as suggesting. It's your vision that counts and we're just trying to dot the T's and cross the I's. No wait, that's not right...

 

[far-trader]

i used an old excellsheet for the design and that shows a volume of 5600 m3 and when im finished i have used 5560 m3 of those. maybe something are wrong in the calculations. maybe i should test the design by doing it by hand from the book.

Could be. I don't recall ever finding a spreadsheet that didn't have some error or house rule that messed up when I compared to hand built. But it's been a while since I did a FF&S design and it could be you have it worked out right. A check wouldn't hurt though so you know you're good on future builds with the spreadsheet.

 

[Frostvarg]

tweaking is my life so nothing gets thrown out. the draft for my 175 000 tons worldbuildership can be found here http://www.svartmagi.org/traveller/mary.html

but its only in draft mode. i modified a battleshipdesign so much is still not changed.

 

[far-trader]

heh

I was going to run a quick ballpark build of the Bullet, used to be able to knock out FF&S designs on paper easy, had lots of it memorized. But it's been too many years. I got bogged down and gave up after a few minutes.

I guess I should sell the old FF&S book as I doubt I'll use it, but it's kind of comforting just looking through it nostalgically now and then

 

[Frostvarg]

working on the deckplan i noticed that with a lenght of 28 meters i will need around 11 meters hight to fit the cargohold volume. there goes my 6 meter double deckhight in its intended hangar aboard the worldbuilder class.

 

[Frostvarg]

ok, after redrawing the deckplans of the cargohauler, to get the cargovolume into a ship 28 meters long, it no longer resembles a bullet in shape. its more lika a lunchbox with wings. a flying lunchbox?? well if thats what it takes.

i had to redraw part of the hangararea on the worldbuilder class ship to make room for the new height of the lunchbox. had to move the spinalmount up one deck too.

all the drawings are done in Campaign cartographer 2 so its not to hard to move things.

The 1000 tons missionfrigatte Grey Wind are nearly finished too. two of those are also going into the hangar aboard the worldbuilder. more info about the grey wind and black rain ships will be posted later.

 

[Andrew Boulton]

heh

I was going to run a quick ballpark build of the Bullet, used to be able to knock out FF&S designs on paper easy, had lots of it memorized. But it's been too many years. I got bogged down and gave up after a few minutes.

I guess I should sell the old FF&S book as I doubt I'll use it, but it's kind of comforting just looking through it nostalgically now and then

http://www.traveller3d.com/downloads/FFS2XL97.xls

 

[Frostvarg]

i have tried to do the deckplans for the bulletclass. i will have to accept that the volume of my plans will come short of the designed ship.

the plans are more of a box than anything close to streamlined.

http://www.svartmagi.org/grey/slides/bullet.JPG

the pic lost some detail when converting from CAD to jpg, mainly the thin details like the wings and the cargo door but you get an idea about how it looks

 

[far-trader]

That's not bad at all though. It has the industrial ugly but functional with just hint of design flair I like

 

[Frostvarg]

thanks, i will fluff it out some more but first i have to redesign the hangar deck on the worldbuilderclass to make room for 4 of those flying pigs

 

[Frostvarg]

After redrawing the deckplan and trying to get the volume to fit within the 28 meters length that the ship should have according to the FF&S i will scrap that lenght. i cant realy get the volume with that short lenght so i will just ignore the rules there and make my ship a bit longer than that.

for now i will consider the FF&S lenght as a guide only.

 

[far-trader]

After redrawing the deckplan and trying to get the volume to fit within the 28 meters length that the ship should have according to the FF&S...

FWIW I also recall not getting good results from the FF&S1 length calculations, until I fudged a modifier for the LM in the configuration step based on Streamlining. I multiplied the LM by: 1.0 for Unstreamlined, 1.1 for Streamlined, and 1.3 for Airframe. And then rounding (usually up) to even 1.5m divisions.

So in your case a base 28m is for an Unstreamlined hull of the chosen configuration* and would be rounded up to 28.5m. A Streamlined hull of the chosen configuration* would actually be 30.2m rounded up to 31.5m. And an Airframe hull of the chosen configuration* would be 36.4m rounded up to 37.5m.

* if allowed for the configuration

But there's nothing wrong with simply taking the length to be an advisement and just going for close either

 

[BlackBat242]

The Traveller descendant of the C-119 Flying Boxcar!

The C-119 Flying Boxcar, was a twin-engine, twin-boom, twin-tail transport designed to carry cargo, personnel, litter patients, and mechanized equipment, and to drop cargo and troops by parachute (utilizing its "clamshell" cargo doors in the rear cockpit). The first C-119 made its maiden flight in November 1947 and by the time production ceased in 1955, more than 1,150 C-119s had been built. The USAF used the airplane extensively during the Korean Conflict as a transport. In South Vietnam, the airplane once again entered combat, this time in the ground support role as the AC-119G "Shadow" and AC-119K "Stinger" gunships mounting side-firing weapons capable of unleashing up to 6,000 rounds per minute per gun. When acting as a transport, the C-119 could carry up to 62 fully-equipped troops or a 30,000 pound cargo load.

Perhaps the Boxcar's most notable feat happened when it made the world's first mid-air recovery of a capsule returning from outer space. This occurred southwest of Honolulu, Hawaii on 19 August 1960 when it snagged the chute attached to the Discovery XIV satellite at an altitude of 8,000 feet.