REastwood

I have a Subaru Forester Diesel and according to the manual the "peak" torque is from 1800 to 2400 rpm. The power at those revs ranges from 80-90kw (107 to 120hp). Peak power is 108kw (145hp) at around 3500rpm. It is a nice smooth engine that revs quite freely for a diesel. Richard.

As Blackrod said: Force = Mass * Accel., therefore Force is proportional to Mass. The greater the Mass the greater the force required. There is also a time component (as indicated by Acceleration - change of velocity over time) the greater the mass the longer it will take to change given the same force. Flywheels are a good example of inertia. The heavier and faster the flywheel the greater the stored energy and the greater the force required to change (slow down or speed up). I guess with aircraft you mainly notice the time component, i.e. things take a little longer to happen with a heavier aircraft than a light one.

Restarting the engine... I thought the reason (in Jabiru's) you have to either slow down enough to get the prop to stop windmilling, or go fast enough that you are close the Vne was because of the electronic ignition. In other words a Jabiru engine will not auto restart when the prop is windmilling anywhere between 60 and 120 knots because it is not windmilling fast enough for the ignition to work, is this true? Has anybody had the experience in a Jabiru where the engine has quit (fuel, ice, mags), and once the problem fixed the engine has restarted? Cheers, Rick.

At YGWA we recommend AMACE Industries at McLaren Vale (sorry haven't got a number on me). They produce a kit and have a builder, or you can put it up yourself. A 15.6x15.6 hangar can hold upto 5 aircraft (depending on size of course), fully erected with concrete slab is about $55,000 to $60,000. a 12.6x12.6 is around the $40-$42K mark. Hangar rent will depend on the aircraft footprint. RV4's and 6's are around the $185, Cessna's 172,182 etc and Piper PA-28's around the $230 to $240 mark. Jabiru 170's and 230's take up a fair bit of space so they are around the $200 mark. Please do check your lease conditions, some places keep the hangar once the lease has expired. Cheers, Richard.

Bill, are those numbers MON (Motor Octane Rating) or RON (Research Octane Rating)? There is quite a difference between the two. AVGAS is MON, so 100LL is (roughly) about 115 or so RON (maybe higher, I haven't got the figures here), where Premium Unleaded 95 is RON, so about 85 or so MON. The main reason for engines like the Jabiru needing a higher octane rating than their compression suggests is the slow burn characteristics, i.e. a low octane give a short bang while a higher octane gives a long bang, putting less stress on crankshafts etc. Rick.

James May said in his show on the flying car, if cars had not been invented and someone came along today and proposed a metal box weighing a tonne, capable of traveling well over 100kph, being controlled by a person operating the contraption with nothing but a wheel and some pedals it would never happen! How hard it must be these days to bring any unique invention into production, I guess you need a lot of determination and squillions of dollars. Let's hope this doesn't die a silent death so that in time it can be refined, copied, improved etc. Rick.

That's the joy of flying! No two landings are the same, the wind speed/direction, weight of the aircraft, turbulence etc, all changing to give you a challenge and thrill each time you come in to land. For me it starts after the downwind checks and just before the turn onto base, I'm in landing mode and my brain is busily calculating, judging and feeling all the way until I'm either clear the runways or push the power for a touch n' go, that's when I'm back to take off mode which is a whole different thrill!

Having been a software developer for 20 years I can tell you that having a system architecture that allows you to do anything and lets programs do anything is very flexible and cheap way to rapidly build up an application base (i.e. the IBM PC, DOS and Windows) BUT it also creates a world of pain, unstable systems, unsecure code and lack of consistent interface. Apple have always controlled their systems and the software written for them. This approach has made the Mac and associated software more expensive initially but because it is more robust and consistent it has been shown to be cheaper to maintain and easier to use. Of course society doesn't always embrace the best idea's, a simple factor such as cost, availability, market saturation, or a killer app can determine which company/technology gets adopted by the majority. As for the phones, time will tell which platform becomes the dominant technology. I have recently purchased an iPhone, simply because I have an iPod and it was easy to plug it into iTunes and required no additional installations, it is simple to use and well supported. P.S. I have never owned a Mac and my first Apple product was an iPod. I have developed software for Unix mainframes and mini's, and PC based systems (Dos, OS/2 & Windows). Cheers, Richard.

Hi Monty, thanks for the welcome. Goolwa is in S.A. next door to the Murray Mouth. Lake Alexandrina is 5 minutes away. It's a great place to fly and with the whale watching season starting it's great to fly over Victor Harbor and spot the whales. Cheers, Richard.

Hi, I thought I'd better get my act together and post on "Just Landed". I have been avidly reading the forums since the start of this year and soaking up the great info and insights into flying. I am in my mid 40's and I'm the last in the family to take up flying. My Dad, two uncles and both brothers are pilots so I thought I'd better stop being the black sheep and learn to fly. I stared in December last year, went solo late January, passed my pilot certificate in March and cross country early April. So after 20 years as a Software Engineer I have moved into the family business and now manage the Goolwa Airport and handle the administration for the Goolwa Rec. Flying School. My goal is to go through instructor training and one day hopefully become CFI. I really enjoy reading the forums each day and hope to contribute more in the future. Cheers, Richard.

Hi, Goolwa Rec. Flying school has two J230D's available for hire & fly. One is fitted with Garmin 495 + transponder. Check out Goolwa Airport S.A. for more info. Cheers, Richard.