Ive heard of jets being run off of runways as short as 450 feet, Ive seen radios claiming ranges of around 1500 ft in the air, but on the forum, ive seen claims of 2-3 miles!!?? Im looking for opinions of what is minimum AIRSPACE needed with respect to jet run-aways.(sig loss) what do you think?

As far as you can comfortably see it. Any further, and what difference does it make

u miss my point.....for safety sake.... liability sake....... lets say ur planning a site, u need to consider how far others property is away from you in the event of jet runaways.... given what you know about range, jet speed and fuel, you need to have a large enough space to buffer between your site and other's property. get me?

Well, let's see - the average turbine has what - 10 minutes of fuel at most firewalled? 10 minutes is a sixth of an hour. 200 mph / 6 = 33 miles. Where ya gonna find 33 miles of open ground on both ends of the runway? [X(] Guess that's why the failsafe needs to shut the motor off

You need room to comfortably manueover, bearing in mind that both your cruising speed and turn radius is greater, plus you would want a buffer on the other side of your furthest flight path to ensure that you are not flying over someone's back yard, or playground, etc etc. Our club has 10 acres and it is not big enough to avoid flying over the neighbors property (although fortunately, that is not an issue..)

However, if you had something like a Reaction 54 (or Boomer intro, or A -10x) you could fly within the same area as required by a Sig Kadet.

Well, assuming you know about failsafe...... you wouldnt want to fly over schools, parking lots, rv parks or anything like that. couple weeks ago, there was a post where Jets were banned because there were houses a quarter mile away!! so again, i ask....not about failsafes...not about groundspace, or line of site....im talking reasonable AIRSPACE to pre-empt as best you can, this issue of our jets always being banned. starting with a clean sheet of paper, and planning something that is from the beginning, a jet friendly site. Im sure SOMEONE out there understands what im asking... what are your thoughts?

Yes, this is what im getting at..... Your 10 acres, is it a more or less square parcel, or long and thin? is your runway run diagonally?

as for the airspace you will need???? from a point from left to right maybe 1,200 feet?
and from the pit area to straight out in front of you, atleast 900 feet. as for a runway anything from 450 to 700 should be plenty.

but it all depends of the type and size of the jet.

hope this answers your question

mark

Actually, you should not use any more air space than with a fast pattern plane. I have seen people with trainers and the plane was so far away all you could see was a dot. When I first started flying RC 34 years ago, a wise man told me to not fly any further away than I was willing to walk. It still fits. Don't fly over houses, parking lots, shopping centers, etc. A jet just gets there quicker. my 2 cents worth. Bob

I made a loop one time where the top was at 1300 feet... as measured by Eagle Tree.. hope this helps

Bela,
2000 feet left, right, and at least 1500 feet out from the flight-line. That rectangular airspace is large enough for even the highest performance Turbine Jets. Those distances are greater than anyone will care to fly... because of the limitations of most of our eyes. Depending on field altitude above sea level you'll need up to a 1000 ft paved runway the wider the better. Now if you really have the room then keep anything else from being built out another 1000 feet beyond the 2000 feet left, right. A 1000 ft buffer behind the runway left and right for a 3000 feet each way. So that would be a rectangular space of slightly more than 1 mile by about 1/2 mile.

That airspace & structure clear ground area should take care of 99% of any R/F link failure runaway Jets assuming everyone has the two second engine fail-safe properly set.

There are fail-safe settings, that if required would further insure against almost all possibility of an out-of-control flyaway... but there are very few owner / pilots that will fly a high dollar turbine powered Jet with those settings.
Lee H. DeMary
AMA 36099

those are a couple of great imputs. Ive often wondered as well, what, if any qualities that other jet pilots consider important that are different than what the prop guys would want. considering how heated the discussions of jet banning usually become, im wondering what this type of flying site might look like. Ive got quite a few ideas, maybe I should start another thread asking what services would be nice to have.

This was/is a good thread. Great topic.

Even with turbine helicopters things are just different. I want more space, less buildings, less possibility of spectators just showing up in the wrong place.

I have heard that 50 acres of fly over is just about right, rectangular as stated before. Couldn't begin to tell you actual dimensions. 450 feet is pretty short for any fast aircraft.
Jack

Lee's got it right re the dimensions for a fast model's airspace needs/comfort. And his dimensions are really only overfly, IMO...more buffer is needed if populated areas are ajacent. Model/pilot dependant ....certainly any model can be kept slower and in closer if absolutely required.

Runway length is also model-dependant, of course. I fly a Euro Sport and sometimes a Spiderjet 16 off my Club field....420' of smooth, good grass, no obstacles nearby. At sea level, summer temps, 16 is marginal unless having a decent headwind...and being lucky/good on the landing approach! And, it took much practice and too many run-offs into the far weeds to get there....it's always a trick w/ the 16, it seems. Grass makes TOs longer, but helps to slow things down upon touchdown. The ES, Facts/others not bad at all at our field.

Hard top/fast models/high wing loadings.....I'd want 6-700' x 30-50'. That would be a luxury!

Ray

If I may add my pennyworth, my son and I put a GPS in our Super Reaper. On average flying back and forth in front of our runway, our turns were 500 metres away from the pilot in both directions and loops averaged about 350metres high. Our grass runway is 220 metres by 40 metres. Take off requires about one third to one half of the strip. Landings are rarely outside it but the Eurosport, the Hawk, Exocet tend to finish at the far end of the strip. With 14lb engine the Intro can be kept with about 50 mtres. Crosswinds and flat calms tend to put the pressure on. Sorry not to convert the units, (39inches=1 metre approx).

However when push comes to shove a full size runway is much the best!