Aurora 4x
New Players => The Academy => Topic started by: formicae on March 18, 2016, 03:28:08 PM
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I'm having some trouble using a jump-capable tug to tow an engineless ship through a JP: it tells me that "at least one ship is larger than the ship with the highest jump rating", but I'm not seeing it. For some reason, this 29,000-ton ship with a 29,000-ton commercial jump drive (which I've confirmed can jump on its own) isn't able to jump a 25,750-ton commercial construction ship:
Liberty class Tug 29 000 tons 235 Crew 848 BP TCS 580 TH 1920 EM 0
3310 km/s JR 2-25(C) Armour 1-84 Shields 0-0 Sensors 8/8/0/0 Damage Control Rating 6 PPV 0
MSP 110 Max Repair 100 MSP
Intended Deployment Time: 3 months Spare Berths 0
Tractor Beam
JC29K Commercial Jump Drive Max Ship Size 29000 tons Distance 25k km Squadron Size 2
240 EP Commercial Ion Drive (8) Power 240 Fuel Use 3.54% Signature 240 Exp 4%
Fuel Capacity 685 000 Litres Range 120.1 billion km (419 days at full power)
Thermal Sensor TH1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
EM Detection Sensor EM1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
This design is classed as a Commercial Vessel for maintenance purposes
Velociraptor class Construction Ship 25 750 tons 44 Crew 726.6 BP TCS 515 TH 0 EM 0
1 km/s Armour 1-77 Shields 0-0 Sensors 8/8/0/0 Damage Control Rating 1 PPV 0
MSP 18 Max Repair 8 MSP
Intended Deployment Time: 3 months Spare Berths 1
Jump Gate Construction Ship: 360 days
Thermal Sensor TH1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
EM Detection Sensor EM1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
This design is classed as a Commercial Vessel for maintenance purposes
Is there something I'm missing?
Edit: After playing around in SM mode a bit, I've found that adding a commercial engine makes the combination able to jump normally, without (to my surprise) it complaining about having no fuel:
Velociraptor class Construction Ship 27 050 tons 56 Crew 770.5 BP TCS 541 TH 150 EM 0
277 km/s Armour 1-80 Shields 0-0 Sensors 8/8/0/0 Damage Control Rating 1 PPV 0
MSP 18 Max Repair 37.5 MSP
Intended Deployment Time: 3 months Spare Berths 2
Jump Gate Construction Ship: 360 days
150 EP Commercial Ion Drive (1) Power 150 Fuel Use 10.61% Signature 150 Exp 5%
Thermal Sensor TH1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
EM Detection Sensor EM1-8 (1) Sensitivity 8 Detect Sig Strength 1000: 8m km
This design is classed as a Commercial Vessel for maintenance purposes
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Detach before you jump. Because you are towing it combines the weight so you have a single 55,000 ton ship instead of 2 ~25,000 ones.
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Detach before you jump. Because you are towing it combines the weight so you have a single 55,000 ton ship instead of 2 ~25,000 ones.
That didn't seem to help.
Since adding a commercial engine did do the trick, and that combination (where the towed ship has a commercial engine--it does need fuel, though) can jump while linked, I suspect the actual check to see if a jump is possible with a commercial jump drive is whether the ship has commercial engines, rather than checking for the absence of military engines like the wiki and technobabble imply.
I've discovered some other interesting towing behavior, though, which I'm also not sure is a bug or works as intended. I made a ship to have low fuel consumption per unit time, using a 25 HS conventional engine:
Freight Barge class Freight Barge 28 300 tons 142 Crew 340.4 BP TCS 566 TH 2 EM 0
3 km/s Armour 1-82 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 5 PPV 0
MSP 38 Max Repair 10 MSP
Intended Deployment Time: 3 months Spare Berths 0
Cargo 25000 Cargo Handling Multiplier 50
Stabilizing Engine (1) Power 1.5 Fuel Use 2.59% Signature 1.5 Exp 3%
Fuel Capacity 5 000 Litres Range 1.0 billion km (4021 days at full power)
This design is classed as a Commercial Vessel for maintenance purposes
I thought this would last for 11 years being towed around, burning just over a liter a day, but instead it lasts for only about a billion km before needing refueling. It seems like the towed ship uses fuel based on the distance it travels, not how much time it takes.
I think the next step is to try out a tug equipped with a military jump drive (though I'm not looking forward to the cost), attached to an engineless ship, to see whether that works.