Womenslayer69 commented at 2022-01-20 22:00:07 » #2681794

Is the top right helicopter using a Intermeshing rotor or a coaxial rotor?

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Oppai_chan commented at 2022-01-20 22:07:00 » #2681796

Looks like a coaxial rotor, given that there is only one shaft visible.

Assuming those pods with the front intakes are indeed the engines... I have to question their placement at the BOTTOM of the helicopter.

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Womenslayer69 commented at 2022-01-21 05:25:57 » #2681868

I assume they might be jet engines (it's not unheard of for a helicopter to have jet engines)

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Oppai_chan commented at 2022-01-21 11:42:30 » #2681936

Most helicopters use turboshafts, not jet engines. They look similar, but a turboshaft converts its power into torque via a transmission to spin the rotor(s), whereas a (turbo)jet converts its power into plain hot thrust simply shot out the back. A small minority of helicopters use piston engines, but they are limited to very light civilian airframes.

Placing your turboshaft powerplant at the bottom of the helicopter is a problem because you need a longer driveshaft to turn your rotor—this adds weight, complexity, and takes up space in the center of the fuselage. Bottom-mounted engines also have a greater risk of sucking up debris when landing and taking off. Look at any modern helicopter (like the Apache in the image) and you'll notice that the engines are mounted at the top to avoid these problems.

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Womenslayer69 commented at 2022-01-21 23:14:40 » #2682085

I know about turbo shafts but since the design is supposed to be "sci-fi" I thought that it having a jet engine wouldn't be that odd since it's real thing that has been added onto helicopters before (very rarely but it has been done).

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Womenslayer69 commented at 2022-01-21 23:19:50 » #2682087

I'm talking about jet engines for propulsion like the s-72

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LivingCorpse commented at 2022-01-22 02:56:36 » #2682121

The box things could be internal weapons bays. The U.S. had built and tested two prototype stealth helicopters (the RAH-66 Comanche) that had internal weapons bays along with external weapon pylons on little stubby wings.

en.wikipedia.org/wiki/Boe...3Sikorsky_RAH-66_Comanche

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Oppai_chan commented at 2022-01-23 18:54:49 » #2682543

Womenslayer69:
There have been some experimental helicopters with jet engines like the S-72, as you said, but note that these hybrid designs still had separate turboshaft engines to power the rotor. The jet engines only supplied thrust for forward movement. If the top helicopter does indeed have jet engines at the bottom instead of turboshafts, there is still no visible powerplant for its coaxial rotors—there is no other air intake or exhaust on the fuselage.

LivingCorpse:
If those pods are internal weapons bays, then where is the powerplant for the main rotors?

In the end, I don't think we need to overthink the design of the top helicopter. It is a fictional aircraft, and the artist clearly wanted to draw something that looked cool without thinking about or understanding how it would work practically.

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LivingCorpse commented at 2022-01-23 21:13:09 » #2682564

Good point. Heck there might come a day Ion engines will be put on helicopters and if I was an artist and asked to draw that as a concept this would probably be my interpretation for what those engines would look like on a helicopter.

Though we are making things more small, sleek and streamlined so if and when we do put Ion engines on helicopters they'll probably be less boxy looking than this.

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Womenslayer69 commented at 2022-02-06 02:33:22 » #2686333

by the time we have working ion engines helicopters will probably be obsolete

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