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NEWS Drop-in wonder engine?

ChuckMK23

Instructor, Flight.
pilot
Print parts at Depot or AIMD? Never! There is too much money to be lost by GE if parts can be made locally.

BTW, are 3D printers really capable of the precision required for turbine engine parts?
Fuel nozzles in the CFM LEAP engines (A320, 737MAX) are 3D printed...
 

hscs

Registered User
pilot
More efficiency and power is generally better for the mission, as long as the existing aircraft can handle the throughput (gearbox, shafts, rotor head, structure, etc.). Those factors all have to be evaluated prior to and during T&E.
This - more power is great until you start tearing up the other dynamic components. I believe some Army 60s had this issue when they put in the 701D engines.
 

busdriver

Well-Known Member
None
The problem came up when "they" started bolting up YT706s. The real ugly problem is when you run out of tailrotor effectiveness.
 

Randy Daytona

Cold War Relic
pilot
Super Moderator
This - more power is great until you start tearing up the other dynamic components. I believe some Army 60s had this issue when they put in the 701D engines.
Having all of that extra power at altitude is great. Decreasing air density affects the engines, not the transmission. Granted, you can't use all of that power at sea level (although it would help in a single engine situation) but it does allow better performance at high altitudes.
 

jtmedli

Well-Known Member
pilot
Having all of that extra power at altitude is great. Decreasing air density affects the engines, not the transmission. Granted, you can't use all of that power at sea level (although it would help in a single engine situation) but it does allow better performance at high altitudes.
This. I'd love to have better engines in the Sierra for the overland/desert heat stuff. It'd be nice to not have to stress out about which bird Mx is giving you to vertrep with in the gulf. The guys in charge and jet guys don't always seem to understand that Pa goes down drastically when OAT/DA start going up the way they do in the desert.
 

hscs

Registered User
pilot
Having all of that extra power at altitude is great. Decreasing air density affects the engines, not the transmission. Granted, you can't use all of that power at sea level (although it would help in a single engine situation) but it does allow better performance at high altitudes.
Yes, but read what bus driver said in the previous post.

Dynamic components include more than just gearboxes - things like elastomeric were getting torn up.
 

SynixMan

Staff Life
pilot
Contributor
Or we could, ya know, not keep recycling a helicopter design from 1970 to save money.
 

RobLyman

- hawk Pilot
pilot
None
High PA/DA is the main reason for the wide chord blades on the 60M. We would over-gross the aircraft before we ran out of power at sea level with our 701Ds. A typical PPCs in the summer here in Florida still gives us 120%+ max torque available each engine (higher w/ contingency power activated). However we can fill our external tanks only half full on our ESSS aircraft due to airframe GW restrictions.

Some special units already have the new engine. Yes, tail rotor effectiveness is an issue for them.
 

Pags

Pope of Chili Town
pilot
Or we could, ya know, not keep recycling a helicopter design from 1970 to save money.
And instead do what? Get a new helo?

Then the 60 fleet would be in the pickle that USMC H-53s and F-18s are in...their budgets would be decreased as money would go to fund the new helo which would then get delayed and therefore require more funds leaving fleet assets even deeper in the hole.
 

SynixMan

Staff Life
pilot
Contributor
Or the 1950s for USMC.......
From everything I've read about the -53K, it shares very little with the older E models. Essentially a clean sheet design internally.

@Pags We've gone around on this before, so no need to rehash. Everything has constraints and the Navy bought all the helicopter they wanted to afford, nothing more.
 

hscs

Registered User
pilot
From everything I've read about the -53K, it shares very little with the older E models. Essentially a clean sheet design internally.

@Pags We've gone around on this before, so no need to rehash. Everything has constraints and the Navy bought all the helicopter they wanted to afford, nothing more.
Was talking about H-1s
 

busdriver

Well-Known Member
None
The big improvement to engines that could actually be used in legacy airframes is better high/hot performance (read that as less/no degradation not an increase in max output) and better fuel economy. I would argue improving the latter by a significant amount would yield better results.
 
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