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Exchange Autopilot options for a TB20

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I’ve question to the experts,
I’d like to get an autopilot like KFC 225 with Vertical Speed operating.
My present equipment is KC191, GNS 550, Sandel 3308 without
VS- operating mode.
Is it possible to exchange the AP?
Is there a better way to get VS-mode?
How much is it for a TB 20? Is it worth to do it?
Can I take a used item ?
Thanks in advance , Thomas

Training / total hours ratio

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Dear all,

I just had a good week (hope everyone did!), flying hard IFR or at night with kids and such and I was reflecting on how it happened as I felt completely rusty a couple of months ago. Then I realized that I had done 2 IFR training sessions and one sim session in the past 15 days, which brings my ratio training / total hours to about 25% over the last 2 weeks.

Going through my logbook, that ratio seems to hover around 20-25%. (800TT including 70hrs PPL, 40hrs IFR, 16hrs CPL, 30hrs insurance-mandated dual for the twin and 50 hours tailwheel/ultralight/bfrs/ipcs).

What’s yours?

PS: the “good week” includes miserably missing out a NOTAM closing an airfield for non-based aircraft (to my defense it got published between the flight preparation & the flight, but still), so let’s never lower our guard!

Mathematics of flying

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I am having to brush up on Principles of Flight and finding that as I dig deeper there are various competing theories – and if I understand correctly we do not have complete equations that explain flight.

I have ordered a Calculus refresher (nearly forty years since I had to look at a differential equation, and they are still quite strange organisms), with the title Calculus without limits, by J Sparks – hopefully gets me beyond the rote learning of integration rules of my youth.

Whether this will arm me with a little knowledge to understand Navier Stokes or Kutta Zhukovsky, only time will tell.

Having had to carry out a few projects in Romania, I have always had a soft spot for Coanda, so hopefully will come across his equations as well. If I understand correctly the weight of the boundary layer control technology on the Buccaneer, neatly cancelled out the benefit!

Any way purpose of the thread starter is to get a debate going on which theory of flight do people subscribe to: Newton’s second law, Bernoulli, free stream tube, Coanda, Kutta, the weight of the paperwork, pilot skill/prayer, etc

Fast(ish) multirole 4 seaters..

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Afternoon all,

I’m currently in the market for a fast 4(ish) seater and have been doing quite a bit of homework over the last few weeks on a variety of options.

Main criteria would be:

- Cruise 130kts upwards
- Good range when loaded (at least 2hrs + reserves)
- Stable IMC machine with some automatics is always nice
- Sensible maintenance costs and no parts with a 2 year lead time..
- Able to live outside in Scottish weather for circa 12-18 months until I can get another space in the hanger…(always a big waiting list!)
- Home base has 850m hard runway available but being able to operate off the 620m one with say 10kts+ on the nose when light helps not screw up the busy circuit having to ask for a different runway…..

Would expect to do circa 100hrs per year via a mix of the following uses:

- Circa 1 hrs flight each way to an airport where I have another aircraft share based.
- Circa 1-2hrs each way trips with the family which would ideally include grass strips like Glenforsa (one of our faves, 780m grass)
- Longer trips into S Europe with the family probably twice per year.
- Business trips couple of times per month up and down the UK with 1, maybe 2 colleagues.

For family trips it would be me, the wife and our 10 and 8 year old daughters, they are all pretty light though Im 200lbs at 6’2".

Budget is somewhere in the GBP 60-80k range and I’m really looking for something which ticks as many of the boxes as possible and ideally likely to bring me the least downtime or significant maintenance surprises. Also something a bit more modern than your usual flying club hack would be nice….

So far looking at some nice examples on the market currently I’ve been giving the following serious consideration:

TB20 – Ticks most of the boxes & look gorgeous but grass is a risk due to prop strike and I’m told corrosion can be a real issue which I suspect would be made worse by a couple of years living outside in the Scottish climate. Also parts lead time I keep hearing can be a real headache. Appreciate any real world views on this? TB10 better for grass I believe but looks a bit light on speed and power and obviously the same corrosion / parts issues.

Cherokee 6 300 – Will certainly cover all the above trips with as much as we can load into it. Bonus of extra seats is we can probably bring grandad also as babysitter ;-) Not that quick though and looks thirsty, is 130kts at 15gph fairly realistic or is it likely to be worse? Pending FAA wing spar AD issues is worrying me here though…

Comanche 250 – Goes like stink and looks nice if a little dated, really no idea on running costs / parts here and its ability to live outside for prolonged periods?

Rockwell 112A – Let face it they do look stunning but from what I can see they ant that fast and struggle with any kind of load. Looks very comfortable and I’ve had a hankering for one for years…

What I’m basically looking for is any real world feedback from anyone who has owned the above types or indeed been through the same decision making process as myself? Any other options I’ve missed would also be greatly appreciated though I’ve spent enough time flying high wing Cessnas to last me a lifetime so have not included them in the list….C182T was the only one I would consider owning for the above and its out of my current price range.

Feedback the the above very much appreciated!



Deepl translator

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Has anyone tried it?

Google translate is really bad sometimes…

It isn’t a browser plug-in, and like google translate it sends the text to some remote computer for the translation. To use it you highlight the text and press control-c twice.

Not sure I would have chosen that key combination but you need to be of a certain age to appreciate the funny side

Img 6493
Snoopy: thanks. As expected, not so much beef there. And you have to pay for shipping, which you don‘t if you order from Bose.

Peter: thanks. Eager to know.
Tmo: oh, thanks a lot. A thought that th…

Screen shot 2017 12 28 at 22.37.48
That’s the same link I posted
I agree that individual trade show visitors risk little. For exhibitors the risk is somewhat higher. We did a show at the Birmingham NEC ten days ago – but that was ten days ago…

The problem is the…


Excess money in the bank (specifically) is a waste, but in terms of using money to fund flying I think it’s better to use money to make money than spend it on something that isn’t actually necessa…

Yes, it is no longer temporary by NOTAMS or special request, it went permanent in the AIP now and there is no other way around it !

They even don’t allow booking approach for practices on weekends …


This bit is not logical.
But rules are not always logical.
I think something get misinterpreted in the discussion between LAC and MAnchester ATC or the text wasn’t proof-read correctly.
There is …

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Helpfully casting aspersions on the American regulators