Read the forum code of contact
By: 19th November 2015 at 20:11 Permalink - Edited 1st January 1970 at 01:00
-The first one. If one wing tip fan fails then control would be rather labour intensive. The Kestrel/Harrier series had the thrust-lines close to the centre-line to reduce assymetry. Even then, they could be a handful at times.
By: 19th November 2015 at 21:41 Permalink - Edited 1st January 1970 at 01:00
-what's new
By: 19th November 2015 at 22:13 Permalink - Edited 1st January 1970 at 01:00
-The top picture, I think the fiscal number is a bit of a clue.
By: 20th November 2015 at 07:15 Permalink - Edited 1st January 1970 at 01:00
-the difference is the amount of propulsive energy compared to the weight of the aircraft and the comparative dead weight on the fans
[ATTACH=CONFIG]242079[/ATTACH]
http://aviationweek.com/nbaa-2015/xti-trifan-600-moving-preliminary-design
A well supported design with momentum
By: 20th November 2015 at 10:28 Permalink - Edited 1st January 1970 at 01:00
-There are two new lift fan designs. One is the Boeing Phantom Swift, which uses two internal lift fans and two wing tip ducted fans.Here is the picture:Another one is an annular ducted lift fan VOTL aircraft, which uses one annular duct:
http://www.mdpi.com/2226-4310/2/4/555/htm
Which design is better?
i rather like the simplicity of the 2nd design, i hope its built so we may see how it perform, and how it can be improved
By: 20th November 2015 at 11:19 Permalink - Edited 1st January 1970 at 01:00
-Well what's the requirement ? that's when things can get fair.
---
Design wise though im not really a fan of "In body" ducted fan as it's awkward and somewhat limiting payload.
The second design, well.. Hiller VZ-1 anyone :3 ?
[ATTACH=CONFIG]242082[/ATTACH]
Control for 2nd design might be similar as VZ-1
By: 20th November 2015 at 14:26 Permalink - Edited 1st January 1970 at 01:00
-It has 'pop-up'and 'look-down' features.
By: 20th November 2015 at 16:49 Permalink - Edited 1st January 1970 at 01:00
-i'm in awe, i didnt know it was built already
By: 20th November 2015 at 18:36 Permalink - Edited 1st January 1970 at 01:00
-Imagine what Hiller's design would look with three axis tilting ring rather than its two dimensional paddles. Can't be any less efficient than a one-man helicopter.
By: 25th November 2015 at 14:24 Permalink - Edited 1st January 1970 at 01:00
-Hiller's design can go up and down. It cannot fly forward quickly.
The TriFan has three fans. How to balance the torque of the third fan?
By: 25th November 2015 at 14:50 Permalink - Edited 1st January 1970 at 01:00
-make it double counter-rotative and you have no torque to fight against
By: 25th November 2015 at 15:19 Permalink - Edited 1st January 1970 at 01:00
-Don't forget the Airmule:
By: 25th November 2015 at 15:30 Permalink - Edited 1st January 1970 at 01:00
-the first design is junk from start to finish, Osprey already exist and does it better,
however i want to see how the 2nd design perform, with the outer frame counter balance the propeller.
By: 25th November 2015 at 21:22 Permalink - Edited 1st January 1970 at 01:00
-The 2nd design has a double counter rotative fan in the annular duct. The turbofan jet engines on the outer frame provide forward thrust.
By: 27th November 2015 at 22:24 Permalink - Edited 1st January 1970 at 01:00
-There are two new lift fan designs. One is the Boeing Phantom Swift, which uses two internal lift fans and two wing tip ducted fans.Here is the picture:Another one is an annular ducted lift fan VOTL aircraft, which uses one annular duct:
http://www.mdpi.com/2226-4310/2/4/555/htm
Which design is better?
Definitely the first one:
[ATTACH=CONFIG]242224[/ATTACH]
Posts: 13
By: Flyinghawk - 19th November 2015 at 16:30
There are two new lift fan designs. One is the Boeing Phantom Swift, which uses two internal lift fans and two wing tip ducted fans.Here is the picture:
Another one is an annular ducted lift fan VOTL aircraft, which uses one annular duct:
http://www.mdpi.com/2226-4310/2/4/555/htm
Which design is better?