PZL Mielec M-15 Belphegor
1973
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PZL Mielec M-15 Belphegor

Following an agreement between the Polish and Soviet governments for the design and production of a new large agricultural aircraft, allocated the designation P.Z.L. Mielec M-15, design of this aircraft was initiated in late 1971 and the initial LLP-M15 prototype made its first flight on 30 May 1973. One M-15 prototype and five pre-production aircraft followed, and completion of the development programme was signified by the award of a full certificate of airworthiness on 4 April 1979. Of unusual configuration, the M-15 had unequal-span biplane wings, twin tailbooms extending aft to twin fins and rudders united by a high-set tailplane and elevator, and fixed tricycle landing gear. A central fuselage nacelle provided accommodation for the pilot and, to his rear, had a cabin to seat two ground crew during ferry flights between operating areas. The single turbofan power-plant was mounted above the fuselage nacelle, and two streamlined chemical hoppers occupied the full gap between each wing, mounted directly beneath the tailbooms, their combined chemical capacity 2900 litres.

PZL Mielec M-15 Belphegor

Plans had been made to manufacture 3,000 M-15s, which had been given the name Belphegor during 1979, but production ended in 1981 after only 120 had been built because the aircraft was uneconomical in operation, P.Z.L. producing the turboprop An-3 instead.

3-View 
PZL Mielec M-15 BelphegorA three-view drawing (744 x 850)


Specification 
 ENGINE1 x Ivchenko AI-25 turbofan, 1500kg
 WEIGHTS
    Take-off weight5750 kg12677 lb
 DIMENSIONS
    Wingspan22.33 m73 ft 3 in
    Length13.13 m43 ft 1 in
    Height5.34 m18 ft 6 in
    Wing area67.9 m2730.87 sq ft
 PERFORMANCE
    Max. speed200 km/h124 mph
    Cruise speed175 km/h109 mph
    Range480 km298 miles

PZL Mielec M-15 Belphegor

Comments
Jim Bowerman, 07.01.2011

There is one of these mounted on a stand at a grass airport just outside of Szolnok, Hungary.

Waldemar, 05.02.2010

Behind the official agricultural use of this M-15 was plane capable to be used during chemical warfare. At that time Russian didn't care how much fuel plane would burn. They were giving that crazy ideas such as M-15 to Polish engineers to keep them busy and steer away from production of M-18 Dromader and other good independent ideas. I'm not sure how many were build, I was flying one time on a glider cross country flight and have seen well over 30 at the Mielec Airport ready to be shipped to Russia. If I go back to my log book, I may recover the date of that flight over Mielec (I thing it was Sept. 1999)
That was the time when Moscow was telling the PZL factories what they can or can not do do. A friend of mine, Polish born crop duster pilot who flown those planes, may have a first hand and very interested stories on the subject.

Episofique, 11.03.2009

3000 were ordered, but the soviets changed their mind. Only 750 have been made for Russia. It was too expensive to maintain they gave the jets to Hungary, and others satellite Soviet Republics.

kalrin, 17.05.2008

onl;y in cracow you say.... ha i saw one in hungary and in russia so i think you have no idea what you are talking about

tiptop, 06.05.2008

The plane was only a prototype. There was no production. If You'd like to see that airplane , come to Cracow. The only prototype is in Polish Aircraft Museum.

Sgt., 19.02.2008

A jet powered biplane?????
Isn´t the engine too powerful,enough to crack the wings?

Reg Saretsky, 06.02.2008

Actually, in Soviet Bloc three seat cockpit allows collective farm boss & political advisor to ride with ag pilot.
Hmmm- maybe a Forest fire fighting special ?...

wolf, 19.10.2007

Chuck, go see Transavia/australia and if you can coment on Belphegor....

Chuck, 22.09.2007

Hello, friends:
This is indeed the strangest, aircraft-like flying machine I've ever heard of and seen. Are there more larger photos of it, its details, its cockpit and the like. I'd like to know this rare thing in detail. Seems incredible that it can fly. Should you have the material I've requested make it available for me as soon as you get it, please. I will very highly appreciate your effort.
Yours faithfully,
Chuck

Gerd Naydock, 29.08.2007

A jet-powered biplane as well as cropduster? Now I've seen it all. I wonder what the thinking was behind using this as a powerplant given lack of fuel economy. Fairly slow maximum speed to boot for a jet aircraft. I presume that the large container-looking structures inward from the struts must be chemical storage tanks. Unbelievable.

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FACTS AND FIGURES

© The upper wing was equipped with a variety of high-lift devices, while the lower wing had nozzles for the dispensing of granular or liquid chemicals.

© The cabin normally housed a mechanic or two, but could carry up to 21 passengers for ferry purposes. These could have been agricultural workers or perhaps Special Forces troops.

© The chemical hoppers were contained within the large interplane struts. Along with the fixed undercarriage these created a lot of drag and increased the fuel consumption.



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