✈️𝐀𝐮𝐱𝐢𝐥𝐢𝐚𝐫𝐲 𝐏𝐨𝐰𝐞𝐫 𝐔𝐧𝐢𝐭✈️
🛩️An Auxiliary Power Unit or APU allows an aircraft to operate autonomously without reliance on ground support equipment such as a ground power unit, an external air-conditioning unit or a high pressure air start cart
🛩️The APU is a small jet engine which is normally located in the tail cone of the aircraft but, in some cases, is located in an engine nacelle or in the wheel well. The APU can be started utilizing only the aircraft battery(s) & once running, will provide electrical power to aircraft systems as well as bleed air for air conditioning and for engine start
🛩️When the APU is certified for use in flight, the APU can be used, as required, to provide an additional source of electrical power in the event of the loss of an engine generator. It can also be used as a source of bleed air for starter assist for an inflight engine relight or to power the air-conditioning packs in the event conditions
🛩️Aircraft APUs generally produce 115 V alternating current (AC) at 400 Hz(rather than 50/60 Hz in mains supply), to run the electrical systems of the aircraft; others can produce 28 V direct current (DC). APUs can provide power through single- or three-phase systems
✳️On the Ground: supplies bleed air for starting the engines & air conditioning systems. Provides electric power to electrical system
✳️During take off: provides bleed air for air conditioning thus less use of bleed air from engine so increase aircraft performance
✳️In flight: backs up the electrical system & air conditioning systems. Start engines in some conditions
🛫Visit Link mentioned in bio for detailed facts and knowledge🛫
Airline: FlyBe (Loganair)
Aircraft type: Saab S340
Manufacturer: Gemini Jets
Notes: I own three. The first one was intentional, then it arrived in my hands. One extra was ordered online and the third came from an old model shop int he UK called Modelzone. Really miss that place, always good prices and staff who were genuinely interested in what they were selling!
Airline: British Airways
Aircraft type: Boeing 737-400
Manufacturer: Gemini Jets
Notes: One of my favourite models, I bought two of them and just couldn't help myself, even though they were on their way out of the fleet! Yet another example of the old Gemini and shows just how truly excellent they can be if they try
Aircraft type: Airbus A320
Manufacturer: Aeroclassics (greenbox)
Notes: Unofficially released by Aeroclassics under greenbox branding due to licencing or lack thereof, this aircraft represents the 200th airbus ever delivered to easyJet, and so wore and inverted fuselage livery, pretty cool huh?
Aircraft type: Boeing 747-8F
Manufacturer: Gemini Jets
Notes: Made during a period of collaboration between Gemini Jets and Phoenix models, a match made in heaven perhaps? Unfortunately it didn't last long and they went their separate ways, one flying high and the other skimming the treetops
I'm Jaden. It was a little difficult but I was able to make the paper airplane✈. It all started today. I told mom I wanted to make paper planes. The 1ST step was easy. It was the 2ND step I had trouble with. But mom helped me, & soon I got the hang of it. Mom helped me on the rest of the steps 3rd....4th.....5TH*.....6th..... 7th & 8th. Soon I made it & we had fun with our planes. The lesson is, no matter how hard it seems, there is always a solution. .
Back in the 1950s, a guy named Merle Larson designed and built an airplane that would have been very well-suited to the dusty High Sierra Fly-in.
Merle had been working as a crop duster, flying old Stearman biplanes, and he designed the machine you see here…the Larson D-1…as a Stearman optimized for agricultural work.
To prevent dust build-up in the tail section, he left the rear portion of the fuselage completely uncovered.
He redesigned the forward fuselage, as well, elevating the cockpit in an effort to improve over-the-nose visibility and apparently also providing for a pesticide tank between the pilot and engine.
In an effort to make the airplane as affordable as possible to acquire and also to maintain, he stripped the airframe down and eliminated as many parts and as much complexity as possible, ditching the fabric wing covering for metal while he was at it.
Proper aircraft tires were apparently an expensive consumable back then (as they are now), so Merle utilized standard automotive wheels and tires instead.
Otherwise, details are extremely scarce.
Only one or two photos seem to exist…but fortunately, this one is an absolutely exquisite study in photography, remarkably crisp with beautiful composure and exposure.
There appears to be no record of the D-1’s fate, although given the demanding conditions in which it was designed to work, we can surmise it might have ended up being written off in a crash.
So, fellow aviation researchers - here’s one to keep en eye out for.
As you’re browsing old webpages with poorly-categorized photos or even rummaging through stacks of old dusty photos at estate sales, watch carefully for Stearman-like airplanes with naked, birdcage-like rear fuselages.
And then be sure to share your findings with us! ⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀ ⠀ ⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀ #avgeek#aircraft#aviation#pilot#avpic#avpics#instaplane#instapilot#instaaviation#flight#flying#plane#planes#airplane#instagramaviation#biplane
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