|
Post by concretedonkey on Mar 12, 2017 16:00:42 GMT
I think there was a detailed explanation on this thread: link
|
|
|
Post by gedzilla on Mar 12, 2017 16:32:55 GMT
I mean, I heard you guys attached MPDs right in the middle of the NTR engines. I don't know how. So I strapped the MPD right at the butt of the ship and they somehow works. 16 km/s, 200 micro-gee of acceleration. 400 MW of power. Cool. Just be aware of one important thing: if you have an MPD and NTR on your ship the acceleration the sidebar shows is with the NTRs burning, not the MPD. To find out the true thrust the ship has with just the MPD duplicate the ship and in the duplicate remove the NTRs. And on the topic of Dv, what happened to the user Deltav ? Is his ban up ?
|
|
|
Post by darthroach on Mar 12, 2017 16:35:27 GMT
If you mean you don't know how to add an MPD to your ships, it's literally as simple as going into ship design and adding an MPD of the same propellant type to your ship. I believe Astro has problems engineering efficient MPDs. Anyhow, MPDs are almost completely useless in tactical. :/ You were saying?
|
|
|
Post by The Astronomer on Mar 12, 2017 16:36:36 GMT
I mean, I heard you guys attached MPDs right in the middle of the NTR engines. I don't know how. So I strapped the MPD right at the butt of the ship and they somehow works. 16 km/s, 200 micro-gee of acceleration. 400 MW of power. Cool. Just be aware of one important thing: if you have an MPD and NTR on your ship the acceleration the sidebar shows is with the NTRs burning, not the MPD. To find out the true thrust the ship has with just the MPD duplicate the ship and in the duplicate remove the NTRs. And on the topic of Dv, what happened to the user Deltav ? Is his ban up ? 1. I knew that. It's just impossible for MPD this size to drive ships at milli-gee level of acceleration. 2. "Username: deltav Last Online: 1 Feb 2017 at 18:46"
|
|
|
Post by Enderminion on Mar 12, 2017 16:49:17 GMT
yes Deltav was banned
|
|
|
Post by gedzilla on Mar 12, 2017 17:18:12 GMT
I know, but I think its up
|
|
|
Post by newageofpower on Mar 12, 2017 18:05:53 GMT
I know, but I think its up IIRC his ban got extended for the fake accounts
|
|
|
Post by vegemeister on Mar 12, 2017 19:31:46 GMT
I like RP-1 NTR/MPD hybrids. It's the densest hydrocarbon fuel, and it makes for very efficient MPDs compared to methane, because of the lack of covalent disassociation voltage (might be unrealistic).
For small drones using pure MPD propulsion, I've found sodium actually works pretty well. That, plus potassium electrodes for low work function, is the best way I've found to get acceptable efficiency out of sub-megawatt designs.
|
|
|
Post by goduranus on Mar 13, 2017 14:27:30 GMT
I use several different sizes of MPDs, with lower powered MPDs optimized for acceleration, and high powered MPDs for deltaV.
|
|
|
Post by The Astronomer on Mar 13, 2017 15:52:51 GMT
For sake of clarity let's use 'delta-v' for physics and 'delve' for user: deltav.
|
|
|
Post by RiftandRend on Mar 13, 2017 19:24:42 GMT
Chemical Rockets are the most viable engine type for drones under 10 kg. At that scale NTRs are too costly and have poor power density compared to Fluorine H2 combustion rockets.
|
|
|
Post by Enderminion on Mar 13, 2017 19:39:04 GMT
even my ~50 ton drones use H-F thrusters, only my 100 ton Torpedo uses an NTR
|
|
|
Post by dwwolf on Mar 13, 2017 19:47:06 GMT
100 ton torpedo ? What is the payload ?
|
|
|
Post by Durandal on Mar 13, 2017 19:49:13 GMT
Isn't Fluorene supposed to be highly corrosive? I'm still leery about using propellants that might eat through their tanks in the 6 months travel to a combat zone.
|
|
|
Post by Hicks on Mar 13, 2017 20:12:50 GMT
Just to increase the sample size, I also run Methane NTR/MPD for my capital ships, but I also run Methane NTR for my missiles. I like to think that I'm keeping the supply chain simple by only using one propellant instead of 2 propellants and an oxidizer, plus Fluorine is just nuts. Fluorine accidents are just the worst, and I can't imagine managing filling/checking a few thousand micro-missiles without spilling some, and multiply that by evey ship using missiles and it just looks safer to use miniaturized and disposable nuclear reactors with a can of Methane than spilling Fluorine anywhere around a weapons platform. Fires and explosions are actually the smallest (if most deadly) problem; it's far more likely the spill will corrode something important and the storage/launcher will fail in transit or at a critical moment in the battle.
|
|