Author Topic: ysi_maniac's drawings  (Read 209836 times)

Online finsrin

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Re: ysi_maniac's drawings
« Reply #925 on: March 22, 2022, 03:13:16 PM »
Yes  :smiley:

Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #926 on: March 26, 2022, 07:21:29 PM »
MustanGina



Propulsion is not decided yet.

Is it possible to conceive a turbo jet that works as such but a part of its power is derived to a shaft that moves a propeler? Or a turboprop whose exhaust thrust is relevant (more than marginal)?
« Last Edit: March 26, 2022, 07:32:43 PM by ysi_maniac »

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Re: ysi_maniac's drawings
« Reply #927 on: March 27, 2022, 01:18:23 AM »
 :smiley:
All hail the God of Frustration!!!

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Offline Old Wombat

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Re: ysi_maniac's drawings
« Reply #928 on: March 27, 2022, 01:19:45 AM »
MustanGina



Propulsion is not decided yet.

Is it possible to conceive a turbo jet that works as such but a part of its power is derived to a shaft that moves a propeler? Or a turboprop whose exhaust thrust is relevant (more than marginal)?

Yes.
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Offline apophenia

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Re: ysi_maniac's drawings
« Reply #929 on: March 27, 2022, 05:51:20 AM »
...Is it possible to conceive a turbo jet that works as such but a part of its power is derived to a shaft that moves a propeler? Or a turboprop whose exhaust thrust is relevant (more than marginal)?

The key word there is "marginal".  Exhaust efflux from a turboprop generally produces less that 10% of the total thrust. (Exhaust thrust is also further reduced by onboard systems tapping bleed air from the compressor, etc.) You might imagine gearing a turbine in favour of exhaust thrust but you'd probably be better off going with 'mixed-power' - ie: turboprop + turbojet/fan.

BTW, exhaust thrust also explains why you see power ratings listed other than shp - like ehp (equivalent horsepower) or, less frequently, eshp (equivalent shaft horsepower). Shaft horsepower refers only to the thrust generated by the propeller. But ehp and eshp combine the thrust generated by both the propeller and the exhaust.

All that said, you'd need an exhaust pipe for a turboprop anyway ... so your MustanGina's tailpipe is already good to go  :smiley:
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Offline robunos

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Re: ysi_maniac's drawings
« Reply #930 on: March 27, 2022, 06:41:18 AM »
How about a big piston engine driving both a propeller and a motorjet, like the Soviet Su-5 and Mig I-250 ?


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Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #931 on: March 28, 2022, 10:11:00 PM »
...Is it possible to conceive a turbo jet that works as such but a part of its power is derived to a shaft that moves a propeler? Or a turboprop whose exhaust thrust is relevant (more than marginal)?

The key word there is "marginal".  Exhaust efflux from a turboprop generally produces less that 10% of the total thrust. (Exhaust thrust is also further reduced by onboard systems tapping bleed air from the compressor, etc.) You might imagine gearing a turbine in favour of exhaust thrust but you'd probably be better off going with 'mixed-power' - ie: turboprop + turbojet/fan.

BTW, exhaust thrust also explains why you see power ratings listed other than shp - like ehp (equivalent horsepower) or, less frequently, eshp (equivalent shaft horsepower). Shaft horsepower refers only to the thrust generated by the propeller. But ehp and eshp combine the thrust generated by both the propeller and the exhaust.

All that said, you'd need an exhaust pipe for a turboprop anyway ... so your MustanGina's tailpipe is already good to go  :smiley:

Thanks for your explanation.

Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #932 on: March 29, 2022, 06:21:29 AM »
North American Thoroughbred

« Last Edit: March 29, 2022, 11:11:56 PM by ysi_maniac »

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Re: ysi_maniac's drawings
« Reply #933 on: March 30, 2022, 01:12:14 AM »
Take out the nose engine and replace it with some guns
All hail the God of Frustration!!!

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Re: ysi_maniac's drawings
« Reply #934 on: March 30, 2022, 02:00:13 AM »
Take out the nose engine and replace it with some guns
I second that suggestion!  :smiley:
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Online raafif

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Re: ysi_maniac's drawings
« Reply #935 on: March 30, 2022, 05:46:34 AM »
Does it have a nose engine ???  Looks to me like its got a nose-cone with an intake on top.  Agree it needs some 20mm or 30mm cannon in the nose.

Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #936 on: March 30, 2022, 08:10:38 AM »
^^^^
Yeah. I was thinking in a pair of guns firing through that 'intake'.  8) :smiley:

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Re: ysi_maniac's drawings
« Reply #937 on: March 31, 2022, 01:39:54 AM »
^^^^
Yeah. I was thinking in a pair of guns firing through that 'intake'.  8) :smiley:

Oh, ok - I mis-saw a nose engine
All hail the God of Frustration!!!

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But you can make the Bastard work for it.

Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #938 on: April 02, 2022, 05:34:27 PM »
Nakajima Ki-84 with Mitsubishi style tailfin: Japanese perfection


Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #939 on: April 03, 2022, 11:10:14 AM »
New variants of A-36 Apaches


Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #940 on: April 07, 2022, 12:30:58 AM »
Nakajima heavy fighter


Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #941 on: April 08, 2022, 10:09:52 AM »
What if we try to improve Me-109K with the addition of wings and, maybe, tailfin from Me-209?


Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #942 on: April 08, 2022, 01:54:19 PM »
Dora goes to Navy ... in Pirate side  >:D



The green//blue camo is intentional  :o  ???

Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #943 on: April 19, 2022, 04:10:07 AM »
What if Spain goes to Vietnam wearing SEA scheme.


Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #944 on: April 19, 2022, 04:40:43 AM »
Spanish Sabre in Vietnam.


Offline ysi_maniac

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Re: ysi_maniac's drawings
« Reply #945 on: April 30, 2022, 08:39:03 AM »
USAF: A pair of simple radarless fighters to attack in Vietnam War