England to Australia Race

Roger55

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http://www.youtube.com/watch?v=bN-YhiNdchs

This is an instructional/review video for the DC-2 "Stork" that KLM entered in the 1934 Race to Austraila. It points out taxi and take off dfifficulties that have to be dealt with. It's not as complete as the video for the fancy DC-3 that's out there. But it is at least a begining resorce. (I think I'll get it once I get $20 ahead.)

Now if you have ever Flown the DeHavalland 88, you notice similarities. The Comet must use diferental engine power to taxi (a hard proposition even with a Throttle Quadrant for me to pull off with any grace), and the plane is a bear to take off while holding the runway. The torque of those engines may be the problem . . . maybe.


Does any one know of a similar video for the Comet. I do know its hard to get the plane down (boy did I have trouble practicing in 2005:redf:) and the Sybex guide gives some information. It is a stock plane in FS2004 so maybe nothing exists, but I thought I'd try.

I remember some pretty good flyers here from years past. Any sage advice would be appreciated. ("Don't Crash," I know already)

The race started At RAF Middenhall, with required stops at Bagdad, Allahabad, India, Singapore, Darwin, Charleville and Melborn. Any other stops were up to the team flying.
I've been staring at a National Geographic Atlas thinking about routes. :running: And that running out of gas thing as always bothers me. Have to land where you could historically count on 100 octain.

Amy Johnson who made the epic flight solo in a beat up Gypsy Moth years before. had her pilot husband get lost and land where he could only get 80 octain in India, and then burn out the Black Magic's engines. Always seemed less than a coincidence that she divorced him not long after. Since she was a qualified mechanic (she had to keep overhauling the Gypsy's worn out engine on her trek), one can imagine that family dialogue!


Roger55

Beware the Stork!
 
Periodically we recreate the MacRobertson London to Melbourne air race here at SOH as one of our multiplayer events. Last time was on the 75th anniversary of the race. Next year will be the 80th anniversary and there is some talk of our doing it again then. Personally I look forward to it as it's one of my favorites of the FS racing events held online.

BTW, I have the FS9 DC-2 and need to fly it more often.
 
I am not sure about the Comet needing 100 octane fuel. My Fathers Proctor in the 50's & 60's used 73 Oct, then 80 Oct when 73 was stopped. When he had to use 100 oct in an emergency it meant checking the valves & seats for wear & cracking. It is possible that Amy's Gypsy had bronze cylinder heads, but not sure about the Gipsy Six R's of the Comet.
Keith
 
The Gypsy and the Comet

Dev One,

Amys Gypsy Moth was beyond its rated life when she bought it. She overhauled the engine before she left England and had to service it herself along the route. I believed twice she overhauled it enroute. The estimate was that she slept 2-4 hours a night. The plane's cargo was critical spare parts. When she landed the last time in Australia I think her gear collapsed. She did not break the record. Close but no Cigar.

In 1934 the DH 88s that flew used souped up engines. They ran on 100 octane. Amy was copilot in the Black Magic, piloted by her husband. The story goes because of lousy maps he got lost over India and put down to get fuel. There was no 100 oct aviation fuel available so he (emphasis on he:male:) decided to substituted 80 octaine. The limped back hours later with damaged engines (not specified). Why would an engine over heat on 80 octane? Damage report is sketchy in the stuff I have.

The Engines are supposed to have been built special for the race, Gypies with bigger bores and higher compression ratios i.e. racing engines that ran hot in several ways. Since they were basically one offs, there were no spares or parts any closer than the DH plant in England. So Black Magic, that I believe was leading at the time. was effectively out of the race, and Amy with her mechanic's licence in addition to a pilot's license could do nothing.



Roger55

Beware the Stork!
 
Black Magic D-88 take off fun

Time to ROTFLOL. Crashed four times while taking off! Wow! What I forgot!

Lock the tail wheel! LOCK THE TAIL WHEEL!

Take off looking at the plane from behind!

You have to S turn constantlly while taking off to stay on the concrete even with the tail wheel locked!


The geer hand crank up!


The Cruise speed of 188 MPH is given without RPM settings or Mixture settings. They call this an official guide?:banghead: Geez Louise, you have to try to find this stuff online?

That was two lousy take offs that I finally made. I remember this plane was a problem. Not as bad a the Spirit, but wooh hooh what a re-introduction to a aircraft!


Hot pilot:cost1:Roger55

Beware the Stork!
 
:gameon:Took off reasonably well. Much less hairy than the first six. On course for Bagdad in British Iraq.

This plane is hard to fly in the VC so the Snapper snaps show the 2D.

That's Neal:female: in the copilot's seat. You remember her the woman trying to get away from a psycho boyfriend who was headed to Chicago at the airporst in Oklahoma when I was on my way to to Northern Indiana along the old US66 route in a Red and white Stearman. So Neal hitched a ride She was the one who turned out to have a trust fund and a taste for my old relatives scattered around the MIdwest.

She can fly an ultra light and has a taste for adventure. She decided to join this expedition because as she said, "it sounds like a blast." I bet she's asleep in an hour.

The NY to Paris Sheep was hanging around but I told those RAF guys to keep the mutton of the AC, and they inspected the plane pretty thoroughly.

Mixture leaned out to 20% at this altitude. Running at 1850 RPM. Guessing. I hope the storms aren't as bad over the balkans. Probably be needing gas about then. Have to get over the Alps a couple of Lows out there. Turbulance over England.


Roger55
 
One of your take off & taxi problems could be the wrong position of the main wheels contact point! In the aircraft.cfg they are shown at +/- 4.0 ft, but note that the engine dimensions are +/- 5 ft. I have just scaled a 3 view on the web & I calculate the engine/wheels are 9.5 ft apart assuming that the drawing is in scale & that the wingspan is 44.0 ft. As for the cruise speed of 188 mph, note that Wiki quote 220 mph.

I am now off to try those dimensions as I have not flown it for ages because of the taxi/take off problem.
Hope this helps.
Keith

P.S. Testing has gone well, much more controllable on the deck & further improved if one changes the 180° tailwheel angle & reduce it to 30°. Can now take off & land without tailwheel lock engaged, & taxying much improved as long as one keeps the speed down so that it does not dig a wing in.

I'm still doubtful of the availability of 100 Octane for the 1934 race as it didn't get the experimental go ahead in the USA (the only producer before 1940) until 1935! Found a .pdf file describing the history of the fuel.
K
 
I don't Know either

"I'm still doubtful of the availability of 100 Octane for the 1934 race as it didn't get the experimental go ahead in the USA (the only producer before 1940) until 1935! Found a .pdf file describing the history of the fuel.
K"

Well you know the story often gets changes.

Amy Johnson flew for the Air Transport Command during WW2. The official story is that she crashed in the Thames and her body was never fround. Years later a a nightfighter pilot said when she showed the wrong color of the day on his signal, he shot her down. What's the real story?

What happened in India in 1934, I doubt anyone can know for certain. There is one old biography and her own book. And I've never seen a book about the race.


I will seach my disk and see if I still have a copy of AC Containment Manager. All I can say is that on the field the plane pulls hard left the only thing I could think of was to modify the Rudder scaler to 1.5.

I have 220 mph as the max safe structural speed.

It looks like the mixture of 15% and a throttle setting of 1825=30 RPM might be right at 10,000 ft. The Carbs are at -12 degrees but turning on the heaters makes the engine efficiency drop quite a bit.
"nice shot!!"

That's just old Snapper, but thanks.​
 
A good little site about the Comet,

http://dh88.airwar1946.nl/

I have the book listed by David Ogilvie, it mentions Black Magics fuel swap, but states that instead of normal petrol (later known as AVgas) they ran low on fuel after getting lost due to a faulty compass. They landed and had to refuel at a bus Garage with (now) Mogas, this being unsuitable for the high-compression Gypsy Six R's. The inevitable thus ensued. I'm not sure of the Octane differences between the two types of fuel, no mention of it in the book.

I did a quick and dirty ACMan/Airwrench tune up for the Comet and also added Var pitch airscrew to simulate the one shot Ratier prop, I just use it once to not cheat.

The book replicates the BRIEF pilot notes given to the pilots pre-race and also flight test notes, I'll look up any figures you want it it has them.

Jamie.

PS. Nice sig pic below ;¬) if you like it click on it.
 
If you study the aircraft.cfg in the propeller section you will see an unusual entry for the one shot pitch change which goes from 25° to 35° at 130 knots, so no need to make it a CSU engine.
If you study even further using AFSD the engine gives more HP than the published figures, but one is unable to achieve the 2350 rpm for max HP as quoted. My models maxes out at about 230 mph at about 1000' with - 1 psi boost, but with the 'R' type intake manifold one should achieve a zero or even positive boost pressure at sea level. The Cross modified Mew Gull has a similar intake & that gets positive boost I understand. I made my Miles Hobby (over at flightsim) have a zero boost by adding a false supercharger - the RAE report on the aircraft I think said it achieved Zero boost at 1000'.
I will see if my ACM confirms dimensions - had not thought of that.
As for bus petrol in India in 1934 - it was probably as bad or worse than 'Pool' petrol available during WWII for cars & bikes, so maybe 60 - 70 Octane at best! So bags of pre-ignition I should think which would burn holes on pistons & Aly cylinder heads!
Keith
 
Handling trials state possible 300mph (ASI) dive with exceptional stability. No sign of Flutter even with coarse handling. Tail unit is vibrationless and no visible sign of any movement.

Also speed trials (level I guess) reaching speeds of 230.5mph

Test flight summary states:

Max at 10,000ft as 222.5mph
Max at Sea level as 235mph

Economy cruise at 200mph at 10,000ft, throttled for economy (no mention of boost).
Sea level cruise 185mph, -3lb/sq.in. boost.

Jamie
 
If you study the aircraft.cfg in the propeller section you will see an unusual entry for the one shot pitch change which goes from 25° to 35° at 130 knots, so no need to make it a CSU engine.

thanks for that, will look in to it. No mention of pitch angles, but, Test flight 8 atates props adjusted to give 2200rpm static and flight 9 2250rpm at 10,000ft.

As for bus petrol in India in 1934 - it was probably as bad or worse than 'Pool' petrol available during WWII for cars & bikes, so maybe 60 - 70 Octane at best! So bags of pre-ignition I should think which would burn holes on pistons & Aly cylinder heads!
Keith

Indeed, after taking off from Jabalpur and trying to make up time at full throttle, on arrival at Allahabad (only 175 miles away) the heads and pistons were indeed badly burned.

If you study even further using AFSD the engine gives more HP than the published figures, but one is unable to achieve the 2350 rpm for max HP as quoted.

Author quotes from 185/2100 source, 230hp and 2400rpm for take-off. He also states he has seen an unmodified race engine with stamp on the data plate of 223hp.

Climb RPM stated as 2500rpm at 110 ASI, 2350 is the figure quoted for the French machines, which were somewhat de-rated, performance wise.

The figures I quote either come from French tests or from Hatfield archives.

Thanks Keith,
Jamie
 
But Jimmy melrose was a true hero in that race.

Quite true and I have a considerable amount of respect for him.

The reason why I say that is I flew the Puss Moth in the recreation we did a few years ago.

More than one of the legs was over 10 hrs. I think the longest was 14hrs long. With no options to land.

Luckily I had a place to pee he very likely did not have that opportunity. :kilroy:
 
Well some Experts

First the more factual story about the 80 oct AV gas and Mogas makes a lot more sense than what I can remember.

Concerning the prop setting (dangling paticipal there) I understood, but can't remember all the details, that the props had two pitches and that the course setting (as apposed to the fine setting) automatically switched in at a certain altitude not at a specific speed. May have that wrong too.

This afternoon I flew from just short of Bonn to the Austrian Border. Throttles are set at 1820 RPM at 13000 feet. Mixture is 15% and I'm traveling at 184mph. The boost rating on the IP reads -3.2 psi. I've used 20% of the fuel since taking off from RAF Mildenhall.

I've criossed a couple of weather fronts and gotten kicked about a bit. There were TS when I took off I couldn't see trying at dawn. So I set off an hour later.

I used to have AFSD on here but I can't remember how to use it. It's been a long while. I read that at 10,000 feet. 188mph leaned out mixture the fuel consumption was supposed to be 20 gallons (12 pounds) an hour. Wish I could check that.

I printed out The GPS operating instructions for FS9 but where I put that ring binder I don't know. Im trying to follow the map. I don't know whether I can make Bagdad. Any one who knows me from before knows how much I worry about gas. With this hot rod I will need all 2500 ft to get it down and take off. Remember, biplanes are my thing. Maybe I should have tried this in the Vimy, God `Elp Us All?
:icon_lol:
No printer; so, I can't print out the ac.cfg file, no printer. You all have an advantage on me. :toilet:


Roger55

Beware the StorK!
 
From our recreation of the race, if you're going around the Alps via Austria, then stops at Vienna and Bucharest Romania were allowed. After Bucharest, then the next stop on close to a line to Baghdad is Aleppo Syria. That puts you crossing Turkey. I've still got the race package somewheres if you're interested.
 
Willy Pictures

Yes, Lets take a look. My list of required stops is RAF Mildenhall to Bagdad to Allahabad to Singapore to Darwin to Charleville to Melborn. Wien is a bit off the great circle; but about an hour ahead? I wonder where I'll be with 20% fuel.

Roger55
 
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