Airframes that bridged Jet and Turboprop

[speedrestriction]

While reading Eric Brown's wonderful "Wings on my Sleeve" I encountered the photo of a Meteor fitted with an early turboprop engine. It got me thinking about aircraft which have flown as both TP and Jet. The Dornier 328 is the only other aircraft I could think of but have there been others? The more obscure the better! It would be great to hear from anyone involved in such a project and the technical obstacles involved in adapting an aircraft from one engine type to the other.

[paulc]

How about the HP7 Herlald for bridging the piston to turboprop gap. Originally designed with 4 Alvis Leonardes engines but got 2 RR darts

[LynxDriver]

The Saab J21 piston powered aircraft was morphed into the 21R jet powered version.

[Haraka]

If you also included post-production variants I think you are looking at a very long list indeed.

[DaveReidUK]

If you also included post-production variants I think you are looking at a very long list indeed. You could make the list a lot smaller by only including aircraft that flew simultaneously with both. :O

http://i.kinja-img.com/gawker-media/image/upload/s--wANwSMu0--/c_fit,fl_progressive,q_80,w_636/mhs623szxr6lycipfjun.jpg

[Haraka]

Then make it longer again by including test beds :)

[speedrestriction]

If you include piston to TP is comparatively commonplace hence the question being TP to jet and vice versa which seems slightly more exotic. Thank for all the contributions so far.

[FlightlessParrot]

XF84-H Thunderscreech, perhaps?

Although it never entered service, it seems low-level passes over enemy troops might have been damaging in themselves.

[Mr Oleo Strut]

Yes, and there was a proposal to redesign and engine the HPR7 Herald with jets, but it never got off the ground. I seem to recall an Avro Lancastrian flying round with a jet fitted on test, was it a Sapphire?, but I might be wrong, and didn't the Noratlas have both petrol props and jets?

[Dr Jekyll]

B36? Shackelton?

[DaveReidUK]

Yes, and there was a proposal to redesign and engine the HPR7 Herald with jets, but it never got off the ground. I seem to recall an Avro Lancastrian flying round with a jet fitted on test, was it a Sapphire?Yes.

http://www.airteamimages.com/pics/66/66634_800.jpg

and didn't the Noratlas have both petrol props and jets? A few did.

http://www.abpic.co.uk/images/images/1266567M.jpg

[Kitbag]

Didn't the Me262 prototype fly on piston & turbojet due to uncertainty/unreliability of the jet engines.

[TowerDog]

. N15509 - Unknown Fairchild C-119 Flying Boxcar at Chandler Municipal | Photo ID 8034 | Airplane-Pictures.net (http://www.airplane-pictures.net/photo/8034/n15509-unknown-fairchild-c-119-flying-boxcar/)

These were popular in Alaska for hauling fish

[ancientaviator62]

http://i100.photobucket.com/albums/m19/ancientaviator62/THAITOUR1_zpsa2e9cbf8.jpg (http://s100.photobucket.com/user/ancientaviator62/media/THAITOUR1_zpsa2e9cbf8.jpg.html)

A C119 used for a rather different purpose than fish hauling.

[DaveReidUK]

I'm surprised nobody has mentioned this pair yet:

https://upload.wikimedia.org/wikipedia/commons/thumb/5/58/Jet_and_prop_provosts_arp.jpg/1024px-Jet_and_prop_provosts_arp.jpg

[Shaggy Sheep Driver]

The Tay Viscount. Had a look of the 737 about it. Based at Seighford for many years. It was the first ever 'fly by wire' aircraft, pioneering the technology.

Vickers 663 Tay-Viscount - research aircraft (http://www.aviastar.org/air/england/vickers_tayviscount.php)

[Double Hydco]

http://i1297.photobucket.com/albums/ag21/belfast97/10965767_10202304763739639_2058239110_n_zpstfvfwt2t.jpg

What should have been the Mk2 Shorts Belfast.......

[Dr Jekyll]

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTWZ8KKRyc1VomwCmWrAMi24jHMDcsCI7T-GN8jMTyiK9vAhjUf

[Wander00]

DH - what's that - the Bel(slightly)fast(er)

[seafire6b]

Nene Viking (the world's first jetliner)



https://upload.wikimedia.org/wikipedia/en/d/dd/Vickers_Nene_Viking_G-AJPH.jpg (https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRxqFQoTCNe7qrj56sYCFUYI2wodIlkKsg&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FVickers_VC.1_Vik ing&ei=xY-tVZfFK8aQ7AaisqmQCw&bvm=bv.98197061,d.d24&psig=AFQjCNGcerWctirgf-jBKGMx9d7yPIPt7w&ust=1437524130129659)

[seafire6b]

RR Tyne AS.57 Ambassador : test-bed only, the left wing had the standard Centaurus piston engine. The same aircraft was also a test-bed for the earlier Napier Eland turboprop.



https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQNAesfalklUqxOHqOhwLLu9UBv__Y00u2SVaEgcTd-lKS4_LyF

[barit1]

A late production B-17 converted to turboprop testbed. Boeing converted three ships, one each for Allison, Curtiss-Wright, and P&W. Identified as model 299Z.

http://upload.wikimedia.org/wikipedia/commons/6/68/Pratt-Whitney_T-34_B-17_testbed_NAN10-50.jpg

The pictured ship is P&W's with T34 in the nose. This ship was eventually converted back to B-17G configuration, named "Liberty Belle", & operated as a demo aircraft for a few years, but suffered a #2 fuel tank leak and inflight fire, 13 June 2011. Liberty Belle made a successful forced landing near Oswego, Illinois, but was destroyed by fire.

[Art Smass]

Aero Commander and Jet Commander

[MarkerInbound]

Someone said B-36/YB-60. There was also the YB-35/YB-49.

[deanm]

B1 - that B-17 photo is remarkable: only the nose-mounted prop is in action, the conventional other 4 appear to be fully feathered!
Dean

[megan]

Type 445 Wellington used to test the Whittle W2B/23 turbojet engine, the engine was fitted in the tail of the aircraft

Type 470 and Type 486 Wellington fitted with Whittle W2B and W2/700 respectively

Type 602 Wellington Mark X fitted with two Darts

[DaveReidUK]

If you include piston to TP is comparatively commonplace hence the question being TP to jet and vice versa which seems slightly more exotic.

We could be here for a very long time ...

[Double Hydco]

DH - what's that - the Bel(slightly)fast(er)

Ha, ha, great isn't it. Remind you of anything?.....

http://i1297.photobucket.com/albums/ag21/belfast97/Scanned%20Pix%20051_zpsbwmoimuo.jpg

[Mechta]

Avro Tudor 8 anyone? It started life as a Tudor 1 with four Merlins.

IMO it actually looks quite pretty from the front, when that great barn door of a fin is less obvious.

http://www.vicflintham.co.uk/content/post-war-research-aircraft-and-prototypes/tud8.jpg

[Mechta]

There were also the Unducted Fan* testbeds that were tried a few years back. They must surely, at least loosely, fit the description of turboprop.

GE had one on an MD-80 whilst P&W used a 727 for their 'Propfan'.


http://www.propilotmag.com/archives/2009/Feb09/images_2_09/GE36.jpg

*Someone at the time commented, "Unducted fan tells you what it isn't, not what it is."

[Just a spotter]

Coming right up to date and an aircraft that made it off the drawing board, I'm surprised the Dornier do328 hasn't yet made an appearance on the thread. Single airframe available as either a turboprop or jet, production is about to restart.

Turkey To Build Dornier 328 And 328Jet | Paris Air Show 2015 content from Aviation Week (http://aviationweek.com/paris-air-show-2015/turkey-build-dornier-328-and-328jet)

watch?v=EiUEa2gkKiI

JAS

[Haraka]

#31
I'm surprised the Dornier do328 hasn't yet made an appearance on the thread.


#1
It got me thinking about aircraft which have flown as both TP and Jet. The Dornier 328 is the only other aircraft I could think of but have there been others?


Ho Hum....... :)

[Just a spotter]

#31
Quote:
I'm surprised the Dornier do328 hasn't yet made an appearance on the thread.

#1
Quote:
It got me thinking about aircraft which have flown as both TP and Jet. The Dornier 328 is the only other aircraft I could think of but have there been others?

Ho Hum....... :)

D-Oh! :ouch:

:\

JAS

[Haraka]

JAS
It happens to all of us mate! :)
H.

[brakedwell]

I was heading back to Swinderby in a Vampire FB9 when I overtook a Dart powered DC3 at around 30,000 feet. It happened near Nottingham (Hucknall?) in mid 1957.

[barit1]

The GE UDF was not only unducted, it was ungeared. Two interposed, counterrotating (contrarotating across the pond) turbines directly drove the two fan rotors.

I knew Art Adamson, the genius engineer who invented this configuration. He was personable, played tennis into his 90s, always loved to talk about his introduction to aviation as a pre-teen in farm country.

Only disadvantage I could see was - It had four separate rotors. Per FAR 25, each engine required four tachs. . . :rolleyes:

[DaveReidUK]

Only disadvantage I could see was - It had four separate rotors.

The main disadvantage of the GE UDF was one you could hear, not see. :O

[Schiller]

Thanks for the picture of the Ryan Fireball FR1, DaveReidUK. It was the first aircraft to fly onto the deck under jet power alone, a month before 'Winkle' Brown flew the Sea Vampire on to HMS Ocean.

[Haraka]

It was the first aircraft to fly onto the deck under jet power alone
Sure, but only because the piston engine packed up in the circuit and the pilot fortunately managed to get the auxiliary jet fired up in time for an unplanned pancake on to the carrier.

[Schiller]

Oh absolutely, Haraka. But it was still the first jet deck-landing!

[tdracer]

The main disadvantage of the GE UDF was one you could hear, not see. :O
I knew a couple people who went down to Edwards AFB (I think, it's been ~25 years) for the GE UDF testing. They said it was the loudest airplane they'd ever heard - and that included full afterburner fighter jets :eek:

[SPIT]

Hi
I think the KC97L had 4 turning and 2 burning :confused::confused:

[GOLF_BRAVO_ZULU]

Further to the Tudor 8, Messrs AV Roe were rather good at bridging piston to Jets, even on Types intended for sale.

http://i111.photobucket.com/albums/n131/Golf_Bravo_Zulu/Avro%20athena%201_zpsh4fkcsba.jpg

Athena T2, RR Merlin

http://i111.photobucket.com/albums/n131/Golf_Bravo_Zulu/Avro%20athena_zpswocmusf6.jpg

Athena T1, AS Mamba

[Haraka]

AV Roe were rather good at bridging piston to Jets, even on Types intended for sale
Although with the Athena it was a case of a turboprop design having to be modified to accept a piston engine......

[pzu]

Saw this recently on a certain SA Forum

https://www.youtube.com/watch?v=ANuDjDJWdtE

PZU - Out of Africa (Retired)

[barit1]

I think the KC97L had 4 turning and 2 burning

Correct.

I was once flying x-c in a Cessna single and found myself on downwind leg of a KC-97 or two practicing t&g's. Kinda lumpy, it was. :}

[Vzlet]

The C-123 started as a glider (XG-20), but also flew with four turbojets (XC-123A), two radials (C-123B), two radials and two jets (C-123J/K), and two turboprops (C-123T).

http://www.airwar.ru/image/i/glider/xcg20-i.jpg

https://upload.wikimedia.org/wikipedia/commons/5/55/Chase_XC-123A.jpg

http://upload.wikimedia.org/wikipedia/commons/b/b9/C-123-2.jpg

http://farm8.static.flickr.com/7107/7641518712_f7176d405f.jpg


http://www.oldwings.nl/content/c123t/mancro1.jpg

[barit1]

With 4 x J47s, its range was approximately the length of the runway.

[rigpiggy]

https://www.flickr.com/photos/13121445@N03/3644311496/https://www.flickr.com/photos/13121445@N03/3644311496/

King Air 200/290