magnemoe

My thought to and you are shooting up. I assume the railing on warships at the time was timber not planks to stop shotgun charges from the enemy main guns shooting up be effective. Same for pirates who tend to use ships as above, having an frigate made you powerful.

Think wooden catamarans has an structural size limit well below frigate as in two half sized bolted together but idea is fun. also no idea how two sets of masts and sails would handle. Talking about ships with an lower deck for storage, a gun deck and upper deck, perhaps an poop deck at the rear so putting the mast in center would not work unless you go for an trimaran there the outriggers is just gun deck with balsa below. Have fun sinking that My only experience with catamarans is two canoes connected to two branch and tied together. Its was some very unstable homemade canoes on an trip for young teens by the church. Or dear god don't let us roll over again theory for finding god, offset by all the swearing then it happened The catamarans was obviously very stable and we even rigged makeshift sails on lakes at the end I think most of the canoes with seats was catamarans, I assume sitting on seats not the bottom added to the unstably as it raised the center of mass but the seats was also that we used to tie the branches to

Square cube law is sails enemy. Above 10.000 ton displacement it become very hard to use sail power only as the sail area become inpractical. Yes you have larger sailing ship but they tend to be Great Eastern or smaller modern cruise ships who often don't have to go far island hopping. And they are sail assisted, granted an cruise ship island hopping don't need much speed and they have an huge crew Going up to 50.000 ton and above and sails don't add much while crew count and fuel cost / ton carried goes down. This goes both ways, you can cross the pacific in an pretty small sailboat but an motor boat has to be more of an ship to do this.

If the switching frequency is fast as in MHz you don't need an large capacitor. You need an large one converting from AC to DC but if smart and only needing 12 V out you could adjust the pulse length to the incoming voltage who is known and predictable. And yes its easier solutions, for an led indicator light you simply add an resistor so voltage over led is correct.

Most common is to change the high voltage into high frequency pulses. To go from 12 to 5 you have 5/12 of pulse being on. You then use one or more capacitor and coils to even out the power so its constant. Power supplies for stuff like computers does the same for AC, I assume they turn it into DC first before doing this tricks to avoid the 50 Hz interfering with the fast pulsing.

Yes they held on to them longer so they could drop in drop zone. I say they got lucky, this could easy ended as an rud.

Say that if you launch more than say 6 times a year you will need to pay an fee to FAA, It might also be an idea with an separate organization for rockets and space.

You can fire single engines horizontally for an full mission duration. Not full stages as it would require an significant larger test stand. and magnitudes more cooling water. And its not very relevant, you do static fires of stages to check for start up issues and vibrations, later to check that everything works. An full duration static fire would not give that much more useful information, it might have cached the ice buildup because using exhaust from turbopump to pressurize, but this was during the landing burn.

Yes so you get steam engine start up times. I'm not sure how you regulate the fuel flow with this, like the gas pedal, seen some WW 2 busses with gas bags on the roof, I assume to have ready to use gas accelerating.

They are more efficient than steam, then I can see them becoming very common, ethanol would be the performance fuel I say.

Probably because they was designed by engineers to be functional rather than designers to look good, functionality is not very important. And the information you want to find, google it. And google if I type in an url I have to add https or the first 10 hits is for sponsors.

Steam engines can run on anything including wood. Now IC engines has an oil sump for lubrication. Yes some parts not in contact with oil like cylinder rings might be a bit harder. Might work to add some oil to the fuel as on 2 stroke engines. More of an issue is that bio ethanol as in moonshine would be more expensive than fossil fuel.

This but scaled up 10 times. Cube square law works in you advantage here.

Yes, I get that the teachers do not want the trend of questions to be know. Like the teacher who only used 7 different questions but at our university student organisations collected exams questions and then published them well before next exam, This is that to focus on, Like history class who is general history but don't question anything before 1930 or programming who was all about databases and not front end.

Why is it bad form to disclose the exact questions? Had an teacher at university who used the same 7 questions on exams , just using random 3 of them. Field was electromagnetism shielding and antennas. A bit relevant as in the 1990's computers tend to run at 100 MHz or the FM sweet spot so have fun with radios next to the pc. But the 7 questions got well known and the teacher more important things to do, might even be related to stealth so he could not talk about it. Anyway poor guy died who was an obvious tragedy for him and his relatives But they got an new teacher with now questions and most failed.

Ran out of power some times like that in KSP. Once on Tylo the rocket was totally destroyed but the probe rover on top was unharmed. Kept the decopler on its bottom as an trophy.

Note that NASA's commercial space station would have an deal there NASA want to probably add 2-3 modules and 4 astronauts to do science, this is making it an safe investment. The operators will do the ship and hotel services. Its like renting an ship, but other actors can join, companies, nation or just tourists. Then some manages to do real manufacturing it would become an separate station. For crystals and other stuff who require no vibrations. Have an free flying module. You could have it dock to an space station to set it up, do maintenance and transfer the product to an lander.

It is, but heating was not the main issue with this it was aerodynamic as in keeping the heat shields in front of the rest. This worked at Duna. On Eve heating was an issue but you could burn into an orbit there Ap was inside Eve SOI and then aerobrake into low orbit. Laythe, no it does not work KSP 2 it also don't work for large ships, it work for capsules. With an 5km/s intercept velocity shields poppe at once. This was also an KSP 2 issue, but at orbital velocites you did not need shields landing at Duna but dont expose sensitive stuff. An lander / rover in KSP 2 had the probe core on the bottom because stupid. It blew up during landing, I could still deploy parachute and used an autopilot for landing burn but could not turn on hand brake so second landing on Duna involved an car chase. Rover from fist lander slowing down the rover/lander from second mission.

At Duna you can come in very hard and fast. Firebird 1 at hardbrake, entry velocity was 3.8 km/s, this is at max Q. burned 1 km/s before final adjustment of Pe, so yes was coming in very hot dropping from Minmus into LKO for injection Obviously putting couple of Km/s dv has to be paid back at entry. Over an week testing and modifying the ship for stability at 8g moving center of drag. Followed by Firebird 2, less mass and a bit slower. I say its the coolest thing I done in KSP. I also simulated some Layte injections and the result was not survivable.

Now its plenty of stuff who is to remote to have cell connection but is also very low bandwidth. IoT has gotten bad press because all the idiot products. But its plenty of smart uses like an cabin, you can call it to turn on the heat before you arrive and tell you if something is wrong. Or simply street light telling then out, or next one is out.

Remember walking home from the buss after an evening on the town. Night, no moon and overcast with forest so visibility was very visible. I was able to differentiate the road from ditch and saw the guard rails on other side. Kicked something soft, before cell phones but had an lighter, it was an badger roadkill. Tangent: My sister got an badger burrow in her garden, son showed the entrance. Meeting her I say: Seen you gotten an badger, congratulation. She was not that impressed and said she now had an shotgun, inherited from our father, but don't think she shot with it

European hedgehog pigs are not very sharp, think duller toothpicks, its like petting an broom, just weird . porcupines looks way more dangerous.

The US made an nuclear artillery shell for the the 16" guns of the Iowa battleships. Before program was finished all the Iowas was mothballed. The 16" nuclear shell was retired before the Iowas was reactivated for the Vietnam war.

Delta clipper main mistake was SSTO, it does not work, yes theoretical but not economical with chemical rocket engines. More looking at current designs. How many decades did we loose? Take something like Superheavy or new Glen first stage but RP1, then using Stoke's hydrogen powered and cooled upper stage. And this is why we are canceling the Apollo program. 30-50 ton to LEO with rapid reuse of both stages on first version. Yes computers was very primitive back then. But pretty accurate ICBM was an thing and you get back control outside of the plasma window.

Only been their once so the buss trip watching the pads and the Saturn 5 facility was an obvious one also as its timed. It was an alligator in the SpaceX pads retention pool. We only got the 39 pads as in 2 and the upper one still had the shuttle setup, this was back before covid. Its an longer trip showing more pads like ULA and Blue Origins ones.