Groundspeed

[stiknruda]

What is the highest g/s that you've had in a piston single?

[Lister Noble]

Stik,
L4 grounspeed was down to 45 mph at one point yesterday!
Ask Maurice ,that P-51 will take some beating.

I was using the chainsaw yesterday but caught a glimpse of you.

Lister:)

[FullyFlapped]

I was using the chainsaw yesterday but caught a glimpse of you.

Lister
Do you often see these images of Stik when you're using a chainsaw ? ;)

FF :ok:

[stiknruda]

Lister - it's fun but it's not a Pitts!
Cruises at 170mph 25square, which I think is quite impressive for a 200hp biplane!
Lakenheath clocked me at 170kts eastbound above the A14.
My strip is almost nearly useable, so hopefully see you over here in the next week or so.
Stik

I stipulated piston single 'cos I could bore you with Mach 0.9 in a twin jet last week!!

[Mungo Man]

A while back I had a GPS groundspeed of 176kts whilst cruising at FL100 in a crappy old PA38! IAS was just over 80kts. I kept the F215 for that day - quite something. Like stiknruda I now get a 440kt groundspeed at work even with no wind but thats cheating!

I think the biggest gs relative to cruise speed is better than outright gs, it sort of feels more exciting!

[WorkingHard]

Many years ago in a humble 172 clocked 186 from Birmingham DME. Controller asked me to confirm type! BTW I was at FL55 only and had a most interesting arrival at Shobden that morning. Never want to do it again though.

[S-Works]

205kts in my 172 a few weeks ago coming back from Guernsey and 280kts a couple of years ago in the baron. Slowest was the same Cessna flight out to Guernsey when I had a 46kt ground speed at one point!

[Lister Noble]

Fully Flapped
Do you often see these images of Stik when you're using a chainsaw ?
Almost every time!;) ;)
In fact I heard him above the noise of the saw,so looked up ,and there he was.

Stik,
I did think to pop in today but Priory is still quite wet and I reckoned I need to check with you before I drop in.
By the way GS today was down to 40 mph upwind.
Lister:)

[Hour Builder]

It cracks me up hearing of SEP's such as 172's PA28's etc doing a +180 GS.

Cessna 172 @ 205 kt :ok:

[IO540]

Any 150kt plane can clock up 210kt GS easily. The TAS gain at FL150 (in a descent, if necessary) plus a 50kt tailwind...

[WorkingHard]

Your point HourBuilder?

[S-Works]

It cracks me up hearing of SEP's such as 172's PA28's etc doing a +180 GS.

Actually I got it wrong the fastest is actually 264kts. Below is the extract from my Garmin GPS Flitebook. Feel free to PM me for the original file. I think if you check the weather for that day you will know where the GS came from. So don't be such a smart arse.


5/03/06 C172 XP G-DAVD EGTC EGBK 1 0.1 0.1 0.1 0.1 17:19 17:27 CRANFIELD SYWELL N52 04.686 W0 36.606 N52 17.326 W0 37.615 18.2 nm 264 kt 2784 ft

[Hour Builder]

My point? MMM do I sence some attitude?

My point was when I look at a small SEP aircraft, it just amazes me that it can do 200kts GS.

Nothing more or less, and I wasn't implying that I didnt believe the figures quoted above.

HB

[S-Works]

In fact my top speed list....
1/09/04 Arrow II R G-BGKU EGBN EGSF 3 0.8 0.8 0.8 0.8 0.8 14:50 15:39 NOTTINGHAM CONINGTON N52 55.248 W1 04.510 N52 28.060 W0 14.495 97.2 nm 181 kt 2997 ft
8/01/04 BE75 Duchess G-GCCL EIWF EGSF 1 1.9 1.9 1.9 1.9 1.9 13:50 15:43 WATERFORD CONINGTON N52 11.458 W7 05.076 N52 28.122 W0 15.827 262 nm 183 kt 8062 ft
12/28/04 BE75 Duchess G-GCCL EGBG EGKB 1 0.6 0.6 0.6 0.6 0.6 11:47 12:26 LEICESTER BIGGIN HILL N52 36.454 W1 01.620 N51 19.266 E0 02.516 99.4 nm 186 kt 3084 ft
12/28/04 BE75 Duchess G-GCCL EGBG EGSF 1 0.2 0.2 0.2 0.2 0.2 15:24 15:37 LEICESTER CONINGTON N52 36.453 W1 01.623 N52 26.465 W0 12.506 32.3 nm 201 kt 2859 ft
4/10/05 BE75 Duchess G-GCCL EGBG EGJJ 1 1 1.4 1.4 1.4 1.4 1.4 10:09 11:33 LEICESTER JERSEY N52 36.451 W1 01.612 N49 12.540 W2 10.981 223 nm 182 kt 6637 ft
5/03/06 C172 XP G-DAVD SPANHOE EGTC 1 0.5 0.5 0.5 0.5 09:40 10:13 SPANHOE CRANFIELD N52 33.501 W0 37.118 N52 04.439 W0 38.166 46.6 nm 195 kt 4001 ft
5/03/06 C172 XP G-DAVD EGTC EGBK 1 0.1 0.1 0.1 0.1 17:19 17:27 CRANFIELD SYWELL N52 04.686 W0 36.606 N52 17.326 W0 37.615 18.2 nm 264 kt 2784 ft
6/25/06 PA44 G-TWIN LFLP EGTC 1 3.6 3.6 3.6 3.6 3.6 13:18 16:54 MEYTHET CRANFIELD N45 56.021 E6 06.235 N52 03.887 W0 37.439 542 nm 198 kt 12981 ft
8/10/06 BE75 Duchess G-GCCL EGSF LFBL 1 1 2.8 2.8 2.8 2.8 2.8 14:14 17:00 CONINGTON BELLEGARDE N52 28.072 W0 14.798 N45 51.602 E1 10.518 441 nm 212 kt 13635 ft
8/11/06 BE75 Duchess G-GCCL LFBL LEMH 1 1 2.8 2.8 2.8 1.8 2.8 07:23 10:11 BELLEGARDE MENORCA N45 51.611 E1 10.788 N41 21.126 E3 36.537 295 nm 181 kt 13827 ft
9/03/06 C172 XP G-DAVD SPANHOE EGSV 1 0.5 0.5 0.5 0.5 0.5 11:45 12:14 SPANHOE OLD BUCKENHAM N52 33.502 W0 37.093 N52 30.324 E1 04.708 67.3 nm 186 kt 7099 ft

[stiknruda]

Sorry chaps - this was just meant to be a light hearted "see how fast I went in my aeroplane (SEP) S&L....

didn't realise it would become so "competitive/combatitive".


Stik

[Nipper2]

I was easily able to go backwards in my Nipper today! Does that count? It's really cool to look out and see the ground slowly retreating out from under the front of the wing!

Once you know that it stalls around 30 knots, power-on, its not hard to see how. I also had 107Kts on the clock coming home (she cruises at 65).

[Kiltie]

201kts FL175 Piper Turbo Arrow.

[foxmoth]

I was easily able to go backwards in my Nipper today! Does that count? It's really cool to look out and see the ground slowly retreating out from under the front of the wing!

If you get another day like this try "vertical circuits" - take off,climb a bit, reduce speed so you travel backwards down the runway, land. Needs coordinating with ATC or a private strip with sole use (where I did it), but fun to try.:}

[DubTrub]

competitive/combatitive and bose-x in the same thread?

Never!:rolleyes:

[S-Works]

Oi Rob!!! Don't make me wheel clamp you!
:p

[PompeyPaul]

205kts in my 172 a few weeks ago coming back from Guernsey and 280kts a couple of years ago in the baron. Slowest was the same Cessna flight out to Guernsey when I had a 46kt ground speed at one point!
A C172 has a cruise speed of say 100kts. If you were flying into headwind then that suggests a wind speed of 54kts ?!?!? What on earth where you doing in that wind ? Surely the C172 would break apart easily ?

[S-Works]

A 172 XP at a cruise is closer to 130kts actually so wind was closer to 80kyts. 200ish HP, wobbly prop. 17,000ft close on 150kt TAS. I think you are confusing air speed and ground speed.

If you fly at 100kts indicated airspeed at 2000ft and the wind is 50kts up the tail, you are still only doing 100kts through the air but are doing 150kts over the ground. Go to 10,000ft and your indicated airspeed is still 100kts, your TAS is about 110kts. The wind at 10,000ft is now more in the region of 80kts (allthough often the wind aloft can be virtually nothing and it is blowing a gale on the ground) so add the 80kts to your 100+10kts and you have a GS of 190kts but your are still only indicating 100kts. VA is based on indicated airspeed so VA in my Cessna is approx 130kts so I still have a 30kt margin.

Gusty conditions and flying beyond VA are a problem, a constant strong flow is not. When flying in the airways 1000ft can make a difference of 30kts and some times 90d direction, so we choose our cruise based on the most favourable winds. If I get an 80kt tailwind at 14,000ft or only 30 at 8,000ft I am going to get the O2 kit out and climb. I have seen some very strong winds at altitude and try to use them to my favour. The jetstream can get into the 100s of kts range and airliners try to use this to there advantage in fuel and time savings.

[foxmoth]

Surely the C172 would break apart easily ?

If the wind is steady as it can be at height a C172 will not even know it is flying in a 50kt or even a 150 or 250kt wind, and you can get it 50 kts+ at 5000' or so and easily less than 20 on the ground :ugh: