• Hi Guest! Forum rules have been updated. All users please read here.

Boeing Chinook Projects

hesham

CLEARANCE: Above Top Secret
Joined
May 26, 2006
Messages
25,875
Reaction score
2,852
Hi,


and here is a comparison between Chinook 234UT and 234LR drawings.


Air International 7/1979
 

Attachments

hesham

CLEARANCE: Above Top Secret
Joined
May 26, 2006
Messages
25,875
Reaction score
2,852
Hi,


I don't know if this concept was developed from Chinook or just a hypothetical
design ?.


Вертолеты. Выбор параметров при проектировании - 1976
 

Attachments

bigvlada

CLEARANCE: Secret
Joined
Jun 30, 2008
Messages
369
Reaction score
20
Boeing HLH is mentioned, but the text says it's on the picture 2.55 and this is 2.57.
 

hesham

CLEARANCE: Above Top Secret
Joined
May 26, 2006
Messages
25,875
Reaction score
2,852
bigvlada said:
Boeing HLH is mentioned, but the text says it's on the picture 2.55 and this is 2.57.

Thank you my dear Bigvlada,


and maybe it was unknown version ?.
 

hesham

CLEARANCE: Above Top Secret
Joined
May 26, 2006
Messages
25,875
Reaction score
2,852
Hi,


and a compound Chinook;


http://www.slideshare.net/ChristianFranciscoMe/12112218-rotorcraftbacktofuturedavis
 

Attachments

Grey Havoc

The path not taken.
Senior Member
Joined
Oct 9, 2009
Messages
11,141
Reaction score
1,425
https://www.flightglobal.com/news/articles/honeywell-pitches-upgraded-t55-engine-for-chinook-430086/
 

fightingirish

CLEARANCE: Top Secret
Senior Member
Joined
Jun 3, 2006
Messages
2,253
Reaction score
419
Gareth Jennings said:
@USArmy briefing slide shows two notional Block 3 concepts for @BoeingDefense #Chinook. One seemingly geared towards increased lift, the other towards high-speed flight. Story on Block 3 timelines and possible tech to come...
Twitter: https://twitter.com/GarethJennings3/status/1024568358430289920
Article: https://www.janes.com/article/82113/us-army-discloses-timelines-for-block-3-chinook
 

Attachments

Colonial-Marine

Fighting the UAV mafia.
Joined
Oct 5, 2009
Messages
662
Reaction score
23
Hmm, seems to me that once you start throwing on extra engines and turning the CH-47 into a compound helicopter that maybe you should just start with a clean sheet large tilt-rotor or something else where less compromises would be necessary.
 

hesham

CLEARANCE: Above Top Secret
Joined
May 26, 2006
Messages
25,875
Reaction score
2,852
Nice find my dear Rolf.
 

TomcatViP

Hellcat
Joined
Feb 12, 2017
Messages
1,574
Reaction score
395
The CH-47 was already tested with a set of wing mounted in the center fuselage and experiments showed that there was no advantages in term of efficiency (with in fact a significant loss during hover and slow speed flight). thanks to the tandem rotors having overlapping discs. See Boeing BV-347




Source (picture):
disneo-art.com
Source (History):
http://www.chinook-helicopter.com/history/aircraft/A_Models/65-07992/65-07992.html
 

Racer

CLEARANCE: Confidential
Joined
Jan 22, 2008
Messages
79
Reaction score
1
That might change with additional propulsion propellers. Unloading the rotors and use most (all?) of power on the propellers would give the additional wings a different perspective. Make them foldable/turnable in hover would solve that issue too.
 

yasotay

CLEARANCE: Top Secret
Senior Member
Joined
Oct 19, 2006
Messages
2,228
Reaction score
339
Racer said:
That might change with additional propulsion propellers. Unloading the rotors and use most (all?) of power on the propellers would give the additional wings a different perspective. Make them foldable/turnable in hover would solve that issue too.
Like most things as they get older, weight. Chinook has been weight challenged for a long time already. Last two mods (I may be wrong here) have done little more than regain the lift weight it Chinook is suppose to have by specification.
 

Mark Nankivil

CLEARANCE: Top Secret
Top Contributor
Senior Member
Joined
Jun 13, 2007
Messages
1,597
Reaction score
355
Recently had a MH-47G drop in for fuel at our local airport. Just look at all the add ons that add to the weight challenge.....

Enjoy the Day! Mark
 

Attachments

AeroFranz

CLEARANCE: Top Secret
Senior Member
Joined
May 4, 2008
Messages
2,209
Reaction score
100
Anyone else having trouble with the picture? Yasotay, can you re-upload please?
[edit: thanks for reupload!]
 

fightingirish

CLEARANCE: Top Secret
Senior Member
Joined
Jun 3, 2006
Messages
2,253
Reaction score
419

TomcatViP

Hellcat
Joined
Feb 12, 2017
Messages
1,574
Reaction score
395
Flatter Fuel tanks reduce the DeltaP loss due High pressure air impacting the airframe body under the disk rotor. That allows for an extra power available for lift, hence ctrl trim ext...
On average up to 8 to 10% of power is lost under the disc.

Move of frwd landing gear give us a hint of the structural changes (from Al to CRFP).
 

galgot

CLEARANCE: Top Secret
Senior Member
Joined
Jul 6, 2006
Messages
742
Reaction score
589
Website
galgot.com
Agreed… the RDF due to the Alpha-R of the compared rotor diameter hyperbolic cosine helps a lot. With full trim , of course.

Btw, Are you sure the tanks are flatter ?
 

TomcatViP

Hellcat
Joined
Feb 12, 2017
Messages
1,574
Reaction score
395
Oh God Galgot, forget about me... The Chinook team results made a very good engineering book... worth a read.
 

galgot

CLEARANCE: Top Secret
Senior Member
Joined
Jul 6, 2006
Messages
742
Reaction score
589
Website
galgot.com
Oh God Galgot, forget about me... The Chinook team results made a very good engineering book... worth a read.
:p I just love when you call me "God Galgot".
Where can i get that book please ? (Serious question).
 
Last edited:

yasotay

CLEARANCE: Top Secret
Senior Member
Joined
Oct 19, 2006
Messages
2,228
Reaction score
339
They told us unibrow types, "more fuel good. Like G model, good, good, you buy"
 

RavenOne

CLEARANCE: Secret
Joined
Jun 18, 2008
Messages
237
Reaction score
177
Slightly digressing, newly formed joint venture Coulson-Unical brought their first CU-47 Helitanker (formerly army CH-47D) to Heli Expo back in Feb in Atlanta. Several more being converted as we speak so aiming for five by 2020 summer. My photos below from both static and departing the show.

Cheers

BFDF3C8C-8561-49E5-BDFE-F3F1FCA62DD9.jpeg 0EEDBDF5-C845-4987-BE07-2F365EC348E4.jpeg 189090D3-6DE4-46A9-A262-CBCD1DEC49DA.jpeg 41B2845A-A731-425B-88E1-C3202AAA7EDC.jpeg 41B2845A-A731-425B-88E1-C3202AAA7EDC.jpeg 2E713F3D-CF35-4CF2-A26A-C6CCF8EFED77.jpeg A2CDA2B1-EA08-4926-807B-9167C1DF8C1D.jpeg CC511B7E-CA71-429F-8747-D3F0F5BC7CB7.jpeg AEE98A96-DCF3-49EC-8734-B007F132858B.jpeg 8BAA6065-DAAD-4982-B1DD-E75F8566F413.jpeg
 

Attachments

Mark Nankivil

CLEARANCE: Top Secret
Top Contributor
Senior Member
Joined
Jun 13, 2007
Messages
1,597
Reaction score
355
Slightly digressing, newly formed joint venture Coulson-Unical brought their first CU-47 Helitanker (formerly army CH-47D) to Heli Expo back in Feb in Atlanta. Several more being converted as we speak so aiming for five by 2020 summer. My photos below from both static and departing the show.

Cheers

View attachment 614355View attachment 614357View attachment 614358View attachment 614359View attachment 614359View attachment 614360View attachment 614361View attachment 614362View attachment 614363View attachment 614364
Fine looking Chinook - they have done much the same to their C-130 fire tankers.

Thanks! Mark
 

TomS

CLEARANCE: Top Secret
Senior Member
Joined
Apr 16, 2008
Messages
3,757
Reaction score
654
From L+K 2/1968.
This is a Sea Knight (Boeing-Vertol 107) not a Chinook (Boeing-Vertol 114).


Edit: However, I did find a mention that this aircraft was modified with stub wings, etc in support of the Model 347 program, before being modified back and sold to the Swedes as a Bv.107II-15.

 

Grey Havoc

The path not taken.
Senior Member
Joined
Oct 9, 2009
Messages
11,141
Reaction score
1,425
We may be looking at a 'French' Chinook, though it remains to be seen if it will survive the inevitable domestic backlash, not to mention the mandarins in Brussels:
 

jsport

I really should change my personal text
Joined
Jul 27, 2011
Messages
1,714
Reaction score
116
The US Army seems to be looking at engine options for the CH-47F, partly it seems due to concerns about T-55 production schedules and the age of the basic design.
Honeywell are looking at another T-55 upgrade while the GE T408 is also in the frame.

https://www.flightglobal.com/news/a...s-ch-47f-engine-alternative-after-t55-461546/
The Army should be looking for engine options all right, for a new d..m helicopter. The Gov should find some means to keep employees studying etc and develop /produce a bigger more capable craft. Jeepers stop playing w that little thing.
 

VictorXL188

Former Aviation journalist/writer
Joined
Jul 31, 2013
Messages
263
Reaction score
399
Hi,


I don't know if this concept was developed from Chinook or just a hypothetical
design ?.


Вертолеты. Выбор параметров при проектировании - 1976
I suspect that the last illustration may have been a proposed layout for the CH-47 when in the design stage. The engines being in a higher position seem to lend weight to that idea.
 

Cordy

CLEARANCE: Restricted
Joined
Nov 5, 2019
Messages
34
Reaction score
19
We may be looking at a 'French' Chinook, though it remains to be seen if it will survive the inevitable domestic backlash, not to mention the mandarins in Brussels:
RAF Chinooks have been supporting French counter insurgency troops in Mali against Islamic militants, typical French charged RAF for the fuel used.
 

TomcatViP

Hellcat
Joined
Feb 12, 2017
Messages
1,574
Reaction score
395
And not even traded for Champagne?

A Chinook buy was inevitable. Long time story.

That it hasn't been done before the tragic recent crash in Mali speaks a lot about the noise and jamming surrounding traditional French procurement process.
 

fightingirish

CLEARANCE: Top Secret
Senior Member
Joined
Jun 3, 2006
Messages
2,253
Reaction score
419
I wouldn't be surprised if Germany also hops on the French interest for the Chinook, so that both forces will have a joint fleet just like with the joint Franco-German C-130J Super Hercules squadron based at Evreux, France. But I really want to know, how well the CH-47 performs with the GE T408 engines of the CH-53K.
 
Top