Showing posts with label aircraft. Show all posts
Showing posts with label aircraft. Show all posts

Saturday, October 1, 2016

Lies, Damned Lies and Statistics: A Lesson In Lateral Thinking

I want to relate a true story that I came across recently because, as I see it, it serves as an excellent example of the importance of lateral thinking, or "thinking outside the box" as some put it.


During World War II, the American B17 bomber fleet was suffering heavy losses, on account of all those Luftwaffe pilots who took exception to Americans dropping high explosives on their cities, their families and, potentially, their Führer. 


So, the USAF decided that they needed to beef up the B17's armor in order to improve its survivability.  Trouble is, unlike the knights of old, you can't just encase an airplane in cast iron.  It (the cast iron) tends to weigh a lot,  which negates the aircraft's ability to, you know, fly.  So additional armor had to be applied sparingly, in strategic places. 


The next obvious problem was, how to identify where those "strategic places" were.  Simple.  In order to figure out where the returning bombers are taking the most battle damage, you start keeping detailed records of where on the aircraft you're seeing the most bullet holes.  Those, surely, are the areas that need additional armor protection.  Makes sense, right?


"Wrong", said a mathematician by the name of Abraham Wald.  You want to figure out those places on the aircraft where you never, ever see any bullet holes.  Those are the areas you want to better protect.  Why?  Because the bombers that you're examining did return from their missions, in spite of being bullet-riddled.  The ones that you want to worry about are the ones that don't make it back; the ones whose bullet holes you never get to inspect.  So it follows that, if there are areas where you never see bullet holes, it's not so much because no bombers ever get hit there; rather it's probably because the ones that do get hit there don't come home.


And so it was that additional armor was applied to parts of the B17 that never, or almost never, seemed to show any battle damage, such as certain angles of the cockpit or at the base of the vertical stabilizer.  And in so doing, countless bombers and their crews were likely saved.


Hats off to Abraham Wald.  Now that's thinking outside of the box!

Saturday, September 15, 2012

There Will Never Be An Arrow

The Canadian Conservative government's decision to choose Grumman Northrop's F-35 joint strike fighter as the (recently reinstated as "Royal") Canadian Air Force's next-generation combat aircraft has been controversial, to say the least.  Many have criticized the aircraft as being too costly and, more importantly, unsuited to the Canadian air force's needs.  Combine that with the the ongoing technical problems that Northrop is having with the aircraft, it's apparent failure to meet projected performance specifications thus far and the fact that production and delivery are well behind schedule and there is arguably cause for concern.  So it didn't come as much of a surprise when I read in the news this past week that a Canadian group has suggested that an alternative aircraft should be considered.  What did come as a surprise is that the proposed alternative was the CF-105 Avro Arrow.

In case you're one of the approximately three people on the planet who have never heard of the Avro Arrow, I'll recap very briefly here by explaining that the Arrow was a next-generation long-range interceptor designed and built for the Royal Canadian Air Force by the now-defunct Avro Aircraft Company back in the nineteen-fifties.  It was generations ahead of its time and boasted performance not thought possible during that era so, after pouring millions of dollars into R&D and successfully building five viable, flying prototypes, the Conservative government of the day took the next logical step (in their minds, at least) and canceled the program entirely, masterfully decimating an industry, writing off all the money spent on the program to that date, to say nothing of the potential revenue from sales to foreign interests, destroying Avro Aircraft along with the jobs of all of its employees and opening the sluice gates for Canada's best and brightest engineers and technicians to be flushed southward across the Canadian/American border where they were immediately scooped up by American organizations such as Rockwell, Boeing and NASA.

All that notwithstanding, and as big an aviation buff and admirer of the Avro Arrow as I am, my initial reaction was still to chuckle when I first read the headline announcing the suggestion to reinstate it.  I mean, seriously?  Return to 1959 aviation technology?  Sure it was advanced for its time, but the electronics ran on vacuum tubes for crying out loud!  Surely this was the pipe dream of some Arrow fan-boy club.

As I read the article, I learned that my so-called "fan-boy club" included a company called Bourdeau Industries and the likes of retired Major General Lewis MacKenzie, one of Canada's top soldiers, and the group wasn't by any means suggesting that Canada rebuild the Arrow as it was (we couldn't anyway, since all plans, blueprints, drawings and technical documentation were destroyed along with the five aircraft that were built).  No, they were suggesting a new, modern aircraft, based on the Arrow design; a 21st-century Arrow, if you will.  As I read on, my chuckling stopped and gradually morphed into an unbroken chant of "DO-IT-DO-IT-DO-IT-DO-IT-DO-IT...." 

Now, as much as I would love to see the Arrow rise out of its own ashes, like the proverbial Phoenix, I know that it will never, ever happen in a million, billion years.  Why not?  One word; politics.  If Stephen Harper's Conservative government were to actually entertain the idea, it would be tantamount to simultaneously admitting that:

a) Their 1950's Conservative forefathers made a huge mistake in canceling the Arrow program, and...
b) Their support of the F-35 program has been so misguided that a cold war era design is a better fit.

Of course, they might have an interesting "out" if they were to point out that John Diefenbacher's Progressive Conservative party has no direct relationship to Canada's modern Conservative party (which is apparently no longer "progressive").  They could declare that that they, the "New Conservatives" are much more forward-thinking than the "Old Conservatives" and, as such, are bold enough to correct the mistakes of their misguided ancestors, but the Harper government has never been known for that kind of lateral thinking.  So it didn't surprise me at all that their response was that the proposal was "not a viable option" because, apparently, the Arrow wouldn't meet the technical specifications required by the RCAF.

Well, let's look at that claim a little more closely.  I was completely unable to find what the RCAF's technical specifications are (I suppose that the government could credibly offer national security concerns as a reason for not making such information public) so let's go with the next best thing and compare the known performance specs of the two aircraft, side-by-side. 

 
Avro Arrow
Grumman Northrop F-35
(Source: GlobalSecurity)
Wingspan
50 ft.35 ft.
Length
85.5 ft.50.5 - 51 ft.
Weight (Empty)
43,960 lbs22,500 - 26,500 lbs.
Weight (Max. Take-off)
62,430 lbs.50,000 - 60,000 lbs.
Engine(s)
Flown:
2 Pratt & Whitney J-75
turbofans rated at 23,450 lbs.
thrust each

Planned:
2 Orenda Iroquois PS.13
turbojets rated at 26,000 lbs.
each
1 F135 Pratt & Whitney turbofan  or
1 F136 GE turbofan
Both rated at 35,000 - 40,000 lbs
thrust
Cruising Speed
701 mph (mach 1.06)Unknown
Max. Speed
1,312 mph (mach 1.98)1,200 mph (mach 1.5 - 1.8)
Climbing Speed
(0 - 50,000 ft)
4 min., 24 sec.Unknown
Operational Ceiling
58,500Unknown

Those are the basics.  I could give a lot more technical details but I won't bore you with them.  The above comparison doesn't tell us much, especially since several of the F-35's specs are either classified or just undetermined.  The F-35 is a smaller and lighter aircraft than the Arrow, making it a smaller target for enemies, but then the Arrow wasn't designed to be a dogfighter; it was meant to intercept bombers.  Also, the Arrow's large size and weight can probably be mostly attributed to the lack of solid-state electronics in its time.  I'm sure a redesigned, modern Arrow could be significantly smaller and lighter.

Individually, the Arrow's engines put out less thrust than the F-35's, even if you compare the never-tried Orenda Iroquois engine.  However, the Arrow featured two engines whose combined thrust would exceed that of the F-35's single power plant, and that manifests itself in the Arrow's superior maximum speed, even using the inferior J-75 engines which were installed in the prototypes.  Also, it has long been argued that Canadian military aircraft need the security of a second engine in case one fails, due to the extreme conditions in the northern latitudes in which they are often required to operate.

In fairness, it should be noted that the F-35 is designed to be a stealth aircraft whereas the Arrow was decidedly not.  However, stealth properties are much more useful for attack aircraft which need to cross enemy borders without being detected and Canada has traditionally played the role of defender, not aggressor.  Again, the Arrow wasn't designed to go and bomb other nations; it was designed to keep them from bombing us.

None of the above addresses the additional prestige, jobs, talent and economic stimulus that would come from reviving a home-grown aircraft industry as opposed to buying something built outside of Canadian borders.

The Arrow program was canceled, ostensibly due to cost overruns, according to the federal government of the day, although there has been much speculation that this wasn't the true reason.  However, if we accept that at face value, our present-day Conservatives should be hard-pressed to support the F-35 purchase, given that both Canada's auditor general and parliamentary budget officer have projected the cost of that aircraft to be almost twice the original figure reported by the federal government.

In 1979, the CBC released a documentary film about the Avro Arrow and its eventual cancellation entitled, "There Never Was An Arrow".  Based on the Harper government's off-hand dismissal of the interesting proposal to revive the program, it's clear that there will never be an Arrow; not as long as Conservative politicians have any say in the matter, anyway.

Sunday, September 25, 2011

How To Save Money Harper Style

Someone once said that a consultant is someone who borrows your watch, tells you what time it is, pockets the watch and bills you.  Whoever said that must have had experience with consulting firms like the one recently hired by the Canadian government.

Global News reported this past week that Prime Minister Stephen Harper's conservative government is paying consulting firm Deloitte Inc. the sum of $90,000 per day to ... are you ready for this? ... advise them about how to save money.

Okay, let's get the obvious sarcastic retort out of the way.  "You want to save money?  Here's an idea; stop paying consulting firms $90,000 per day!"  Whew!  I feel better now.

The opening paragraph of the news story reads "The Harper government defended paying almost $90,000 a day to a big consulting firm for advice on how to save money, saying it can't do the job properly by itself."  Apparently not.  That has to be the most self-validating statement of all time!

All sarcasm aside, let's grant that there may be some validity to the concept of spending money in order to save money.  Ninety thousand dollars a day is an awful lot of money to spend.  That's $450,000 a week, $1.8 million a month.  What value will the Harper government be getting for this money?  What will Deloitte be doing that's worth $90,000 a day?  Writing reports?  It had better be some report!  What are the odds that Deloitte would have accepted the contract had they been offered $45,000 per day, or even $10,000 per day?  That's still pretty good revenue by most business standards.  How did the Harper government and Deloitte arrive at $90,000 per day?  Did the conservatives approach any other consulting firms?  Was there any sort of tender or competition?

Until recently, the Harper government had a knowledgeable, experienced consultant who provided many sensible suggestions for cutting waste and saving money.  Her name was Sheila Fraser.  She was Canada's Auditor General up until her recent retirement and, while she was no doubt well-paid, I suspect she didn't make anywhere near $90,000 a day.  Unfortunately, the Harper government chose to ignore pretty much everything she ever suggested.

I wonder what will happen should the ultimate irony unfold and Deloitte advises the Harper government not to throw away $30 billion for stealth fighter jets that aren't even suited to the Canadian Forces' requirements, or that there's no need to spend $4.4 billion on expanding prisons when stats show that the crime rate is diminishing, and there is no evidence that longer incarcerations are any sort of deterrent to the criminals that are out there.  Both of these projects are near and dear to the conservatives' hearts, and they've clung to them stubbornly despite strong public opposition and hard data showing both to be questionable initiatives at best.  What if their expensive new consultants agree that these are bad, financially wasteful ideas?

I started this post with a quote.  I'll end it with another from George Bernard Shaw who said "Democracy is a device that insures we shall be governed no better than we deserve."  The Harper government has validated that observation as well.

Saturday, February 5, 2011

Chinese Air Force: The New Top Gun

There has been increased speculation since the turn of the century that China is fast closing the gap between itself and the United States and may be emerging as the world's next great super power. The Chinese have their own space program, their military power is growing in leaps and bounds, and their economy is growing, even as America's economy falters. In fact, Secretary of State Hillary Clinton recently referred to China as "America's Banker".

So it would be understandable if a recent Chinese state-sponsored video depicting China's state of the art J-10 fighter obliterating some hapless enemy aircraft caused concern at the Pentagon. That is, it would be, if the video hadn't been ripped off from a Hollywood movie.

For all its political and economic clout, China has apparently not yet learned that you never, ever try to put one over on internet users. Believe me, this blogger has long since learned his lesson about the folly of trying to fool the online community! It wasn't long before several sharp-eyed web surfers, bloggers and Comic Book Guy type geeks noticed a suspicious similarity between the fireball resulting from the J-10's fearsome missile and a fireball from the Hollywood movie, "Top Gun". In fact, the two appear to be identical.

Needless to say, the incident has left China a bit red-faced. (Get it? Red! China! Red China! I made a funny!) But, you know, they may just be on to something here. Perhaps other governments, even the United States, could make themselves seem more intimidating by passing off Hollywood footage as their latest military arsenal. Here are some modest examples for your consideration:

To begin with, Russia could follow suit with footage of their own next-gen fighter jet:


As an added bonus, the pilots all look like Clint Eastwood. Who wouldn't be intimidated by that?


The U.S. might unveil its latest "Star Wars" anti-missile defence satellite:

After that, they won't need their bureaucracy any longer. Fear will keep the local countries in line. Fear of this killer satellite!

The Afghan troops might show off their latest all-terrain troop transport:


Heck, if it can withstand a nuclear holocaust, it can certainly withstand the occasional IED.

How about the latest military attack helicopter?


I understand it's equipped with a forward-mounted, twenty-millimeter electric cannon. Its six barrels are capable of firing four thousand rounds of ammunition per minute. And that, gentlemen, is one hell of a shit-storm in anybody's language!

Or they might claim that they're taking soldiers out of harm's way entirely and replacing them with new robotic soldiers:


Or strike fear into the enemy by threatening to use their latest heavy artillery guns:


This idea needn't be limited to the military. Police forces might demonstrate their newest tactical armored vehicle:


You get the idea. The list could go on and on. Why squander military and/or law enforcement budgets when Hollywood has already spent the money for you? It's faster, cheaper, and will probably get more peoples' attention in the long run.

Those Chinese, they're not so dumb!