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I hyper focused on 3D cad in school. I know details on how to manufacture stuff. My contacts list in my phone could probably get any part a human could possible design in the right place to get made...especially gun parts. I really like sheetmetal parts. I really like riveting. I spent 20...

Hey! Cessna 340 tanks!

Blue Origin New Glenn. Talk to the dinosaurs re: Chicxulub

building on previous: If going remote with a rod isn't available Curie temp magnets in the 900c range do exist like Hiperco 50 $$$ Coppers conductors resistance at that temp is going to be up there. no insulators other than ceramic that are going to handle it. Thermal expansion will be...

Anyone here from SpaceX... They are doing something absolutely wild no one has had the balls to try. They are strapping rockets to industrial fluid tanks and trying to put them in orbit... Adjusted for inflation: 1:US nuclear Arsenal 10 Trillion 2:WWII 5 trillion. 3: Iraq Afghanistan 5...

None of the profiles in DO-160 are going to be applicable to eVTOL environments. It's neat when you're in the lab the Turboprop profiles sound like you're in a turboprop. Helicopter profiles sound like helicopters. eVTOL profiles sound like... they don't exist yet. You could do the random...

1st off, not like anything I've seen/I don't recognize the formatting. BUT It sure feels familiar. Looking at -A- I'm guessing a Datum simulator/gage tooling, is installed into the associated bolt circle to establish a central axis from which A1 dimensions are pulled. Basically saying hey this...

300 amp 28v DC starter generator. Last I checked that's 8.4kw... DC. Off grid as it gets. -------------------- I'm fairly impressed too. There are sensors in the battery to help monitor if they do decide to catch on fire. But I promise I watched it hit 15.2 volts at the peak inrush... then...

I promise we started with basic physics and worked up. Gas driven generator is the only way. A turbine would be arguably better, but development costs are way too high.

I'll second MIL-R-47196A. They have a fantastic table for tolerance that requires a minimum diameter, then a fairly strict height tolerance (about .010 tighter than where that table OP posted came from). Very easy to inspect and flow down to manufacturing without requiring anyone to realize D is...

Okay I wrote this as a forum post, but ignore that. Lets sus out the main question at the end. "Sorry to leave you hanging... took a minute to come back to this project. So I just looked... the batteries are closer to $10k. But like I said We’re making an engine driven generator. I was joking...

I know. Has to be a gas generator. That part of the design is above my pay grade.

You're not wrong. but... that would require an infrastructure to support loaner batteries that doesn't exist. These batteries are about $5k.

Hey so I'm building a generator system with an existing 300 amp 28v DC starter generator. For most of it's use it's going to be driven by gas engine to make about 200 amps. But I need it for starting a large engine, that pulls north of 500 amps spike on inrush. The system currently uses a large...

Fantastic. Glad to do something helpful! I'm glad you brought this up. Making me rethink how I do some stuff.

You want to see some incredible stuff... visit Gulfstream in Savannah. The "panels" or "units" (I forgot what they call them) that they make on those giant machines that literally do everything is straight out of star wars.

Wow. I feel like this is one of those Mandela effect situations. I generally think of it as poor practice... but figured someone taught it at some point. I pulled everything from WWII all the way to every bit of Boeing technician training (that I helped update a few years back), Boeing Process...

rb1957, sorry to mislead totally understand... I'm aft of the pressure bulkhead, in the aft equipment bay. wouldn't touch the actual pressure bulkhead with a 10ft pole no JAL123 for me please. The 6.8" circle I need is going to blow out at least one stringer... and honestly that hand calc is...

So round two... I'm clear of the first group, getting ready to hire another set of DER's but want to guide where this is going. part 23 turboprop. aft of pressure bulkhead. I have the OEM FEA analysis results for the area. -previously mentioned there is an existing hole done by the OEM near...

But you were the manufacturer. You were unable to rework the part... it's no longer a part per GD part definitions. "rework" is not a FAA term. It is only internally defined by a manufacturer or PMA holder per their approved QMS. EDIT: True. The catch all there is "article". But I assume...