These are very impressive...

If you want to say something that doesent fit anywhere else!
MAIN WEBSITE: http://www.wheelchairdriver.com

These are very impressive...

Postby Scooterman » 16 Oct 2018, 17:02

and expensive I would imagine...?

https://youtu.be/ae3ju4rEGgQ
User avatar
Scooterman
 
Posts: 1751
Joined: 03 Jul 2016, 10:11
Location: SE England

Re: These are very impressive...

Postby Burgerman » 16 Oct 2018, 19:45

I have a few turbojet motors. They are now becoming so common that around half my local flying field are now jets, and even a turbine helicopter now and again. Cost? Lets say a all singing all dancing powerchair is about the same cost as one of the jets in your vid. And a hell of a lot of work.
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: These are very impressive...

Postby Scooterman » 17 Oct 2018, 09:43

Burgerman wrote:I have a few turbojet motors. They are now becoming so common that around half my local flying field are now jets, and even a turbine helicopter now and again. Cost? Lets say a all singing all dancing powerchair is about the same cost as one of the jets in your vid. And a hell of a lot of work.

I suppose if it's someone's hobby and they have the time and money, then it's okay. And you must learn a lot building/maintaining them.

For yourself what came first: RC aircraft or powerchairs? There must be a lot of crossover in knowledge between the two.
User avatar
Scooterman
 
Posts: 1751
Joined: 03 Jul 2016, 10:11
Location: SE England

Re: These are very impressive...

Postby Burgerman » 17 Oct 2018, 11:59

RC aircraft from about 10 years old or before. Although it was control line and free flight early on. Thousands of home designs, and tons of experiments! I was also building pulse jet engines and my own turbojets using turbocharger parts etc long before you could buy these things over the counter. So every time I see an "expert" that is new to this hobby that just bought everything I despair!

i BUILT RC systems from kits in the 70s. I scratch built planes from 69 till today. I scratch built pulse jets from the early 80 and 90s and built turbojets from scratch in the early 90s. Along with a lot of experimental superfast planes. Scale stuff never interested me. Then in the 90s, til today batteries, electric power etc. Along with drag racing, race engines for bikes with turbos, fuel injection systems, rolling roads for mapping and graphing the power systems, nitrous injection systems, (all home built systems) etc etc. Too much tech stuff to list. But its all related.
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: These are very impressive...

Postby Scooterman » 17 Oct 2018, 17:47

Burgerman wrote:RC aircraft from about 10 years old or before. Although it was control line and free flight early on. Thousands of home designs, and tons of experiments! I was also building pulse jet engines and my own turbojets using turbocharger parts etc long before you could buy these things over the counter. So every time I see an "expert" that is new to this hobby that just bought everything I despair!

i BUILT RC systems from kits in the 70s. I scratch built planes from 69 till today. I scratch built pulse jets from the early 80 and 90s and built turbojets from scratch in the early 90s. Along with a lot of experimental superfast planes. Scale stuff never interested me. Then in the 90s, til today batteries, electric power etc. Along with drag racing, race engines for bikes with turbos, fuel injection systems, rolling roads for mapping and graphing the power systems, nitrous injection systems, (all home built systems) etc etc. Too much tech stuff to list. But its all related.

Wow! What you've done is way above my tech level. I did a 4yr C&G EITB electrical apprenticeship. It was a good apprenticeship and taught me all I needed to know regarding electrical installation, electrical theory, IEE wiring regs etc. But nowhere near your technical level. I haven't the intelligence.

My older cousin who would be about the same age as yourself also used to fly control line planes back in the '70s. He had one or two which were no more than a flying wing with a motor. He also had a (what seemed big to me at the time) a control line flying boat.

I had a few balsa wood gliders I built myself, they were great fun! I was always repairing them with net curtain and wall paper paste? And kites, I used to make them out of split bamboo and a plastic bin liner. I never kids today doing anything that we used to do. They wouldn't even know what a bolt bomb was, we used to make a few of them too!
User avatar
Scooterman
 
Posts: 1751
Joined: 03 Jul 2016, 10:11
Location: SE England

Re: These are very impressive...

Postby Scooterman » 17 Oct 2018, 18:00

EDIT: In case anyone else reads this, a bolt bomb is two bolts joined in the middle by a nut that acts as the combustion chamber. You scrape off match heads into the chamber, gingerly tighten the bolts, tie a bit of string between the bolts (so you don't lose them) and chuck it up in the air hoping it'll land on one of the bolt heads.

It's not a terrorist's pipe bomb
User avatar
Scooterman
 
Posts: 1751
Joined: 03 Jul 2016, 10:11
Location: SE England

Re: These are very impressive...

Postby Burgerman » 17 Oct 2018, 20:12

We used to do the same thing - sort of. Buy a 3 inch threaded cast iron "nipple" and 2 screw on threaded cap ends.

Fill with shot gun cartridge powder. And fit with a fuse wire "fuse" and leave two wires hanging out. Set off electrically. (extension lead and your cars battery). Dont be anywhere near it. Make sure you grease threads, as spark or trapped powder might be a bad thing. And connect caps and nipple to each other with a wire to be sure no spark from static! We did them in a field in the rain. Throws earth as a cloud as high as you can see, and is very loud. Theres never any bits of iron left to find. Just a bigger hole. This was before the days of terrorism. Doing so today, would likely see you arrested for some terrorist activity. We just did it for fun. And relatively safely.

Image

Image
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: These are very impressive...

Postby Mechniki » 15 Jan 2019, 13:11

Burgerman wrote:We used to do the same thing - sort of. Buy a 3 inch threaded cast iron "nipple" and 2 screw on threaded cap ends.

Fill with shot gun cartridge powder. And fit with a fuse wire "fuse" and leave two wires hanging out. Set off electrically. (extension lead and your cars battery). Dont be anywhere near it. Make sure you grease threads, as spark or trapped powder might be a bad thing. And connect caps and nipple to each other with a wire to be sure no spark from static! We did them in a field in the rain. Throws earth as a cloud as high as you can see, and is very loud. Theres never any bits of iron left to find. Just a bigger hole. This was before the days of terrorism. Doing so today, would likely see you arrested for some terrorist activity. We just did it for fun. And relatively safely.

Image

Image

you watched Terminator and decided to make a pipe bomb. I am stupefied

Nowadays you need a gun licence or a fireworks permit to even get gunpowder UK (except you can still buy blanks without a licence and cut the blanks open). Though lots of sites will tell you the basics to make it
potassium nitrate, powdered sugar = smoke
potassium nitrate (got from human waste), sulphur, charcoal and water - make a paste you can guess the rest
there are other combinations of things.
Similar to this is wrapping CO2 cylinder in visco fuse wire, available from pyrotechnic suppliers and some garden centres
User avatar
Mechniki
 
Posts: 238
Joined: 22 Oct 2013, 21:59
Location: Dorking, Surrey

Re: These are very impressive...

Postby Mechniki » 15 Jan 2019, 13:14

or over charging a Lithium Polymer battery
User avatar
Mechniki
 
Posts: 238
Joined: 22 Oct 2013, 21:59
Location: Dorking, Surrey

Re: These are very impressive...

Postby Scooterman » 20 Jan 2019, 22:46

BM - Have you ever dabbled in rocketry? I would imagine that would be right up your street. I.E. Technical and goes like stink. ;)
User avatar
Scooterman
 
Posts: 1751
Joined: 03 Jul 2016, 10:11
Location: SE England

Re: These are very impressive...

Postby Burgerman » 20 Jan 2019, 22:54

I tries to build a liquid fueled (diesel) and nitrous oxide rocket engine several times. All melted. All worked. I was using water cooling on the last one, made from iron pipes. It didn't care. Also tried nitrous oxide in pulse jets. It works, but very wasteful.

you watched Terminator and decided to make a pipe bomb. I am stupefied


Why? Far less fuss about such things in the 70s. Anyway that was before terminator.
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: These are very impressive...

Postby martin007 » 21 Jan 2019, 23:37

https://youtu.be/ae3ju4rEGgQ

Guau! :bravo :bravo



You're a very complete man Burgerman.
You know how to do everything.
User avatar
martin007
 
Posts: 933
Joined: 03 Jun 2015, 23:55
Location: Spain

Re: These are very impressive...

Postby Burgerman » 21 Jan 2019, 23:59

Putting gunpowder in a pipe was not very complicated. Esp when you already have some, and a van full of plumbing fittings... We just dug holes and put them in so it was safe. Model plane flying hobby at the field. Just a bit of fun.
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: These are very impressive...

Postby martin007 » 22 Jan 2019, 00:13

Looking at it from here, Spain looks like a third world...
User avatar
martin007
 
Posts: 933
Joined: 03 Jun 2015, 23:55
Location: Spain

Re: These are very impressive...

Postby Burgerman » 22 Jan 2019, 00:22

Those planes?

There are plenty of those at my local flying site. I even have some but fast, not scale as I think scale stuff is boring to fly. Slow and heavy. But those are also quite common in Spain. But Spain's gov banned public shows etc. So all out of sight in private clubs. Spain is a little poorer. But people somehow find the money for their hobbies. Its just harder.

https://www.modelflying.co.uk/forums/po ... p?th=43423 you may find interesting.
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom

Re: These are very impressive...

Postby martin007 » 22 Jan 2019, 00:25

Those planes?


Yes.

But Spain's gov banned public shows etc.


It must be because of that...
User avatar
martin007
 
Posts: 933
Joined: 03 Jun 2015, 23:55
Location: Spain

Re: These are very impressive...

Postby Burgerman » 22 Jan 2019, 00:28

No they still fly at their private model club sites, its just that they do so in private.

These places will sell you turbines, airframes, servos, RC etc https://www.google.com/search?client=fi ... -6.5830315

And tell you where your nearest club is. The only thing you are not allowed is big model plane shows, as we have all over the EU, and US in summer.

UK list:
https://www.modelflying.co.uk/events/

We also have competitive events, from pylon racing, gliding, combat with streamers, and many more than you can imagine. Hundreds of classes. There are frequently Spanish competitors. You just live in a quiet place.
User avatar
Burgerman
Site Admin
 
Posts: 44357
Joined: 27 May 2008, 21:24
Location: United Kingdom


Return to Anything

Who is online

Users browsing this forum: No registered users and 18 guests

 

  eXTReMe Tracker