I watched a video on this fancier, she spoke about the 11 feather Janssen birds from old mam Janssen not the brothers. And still today they breed 11 feather youngsters.
https://winkiepigeons.com/Monick-Nys/en
Distance racing pigeons
I doubt it Neil, birds when moulting don't often throw the same feather in each wing at the same time. Birds can have a dominant wing, or a bias to swerve left or right, so maybe an 11 flighted bird would have that wing more dominant?
Although when having a dropper it's always best having only one wing cut down, as birds with both sides cut can still get up and fly.
A bit of information on the 11 flighted "JULIA" hen of Dave Thrall
"JULIA" is the Dam of the outstanding "BLUE RAY", "BROTHER RAY", "THE 499", "THE 500", "THE 335", "THE 853", "THE 365", "THE 773"
All super racers and winning at club, Federation and NEPC level
"The 499" 20-58499
A Direct Daughter of the No.1 mating of "SUPREME" x "JULIA"
This sister of "BLUE RAY" and "RAY'S BROTHER" is winner of
1st Open NEPC Upper Heyford 1,073 birds
3rd Fed Bovingdon 809 birds
3rd Fed Rugby 1,197 birds
4th Fed Holmsley 236 birds
6th Fed Reading 659 birds
14th Fed Holmsley 531 birds
15th Fed Newbury 519 birds
15th Fed Kettering 402 birds
23rd Open NEPC Kettering 1,182 birds
25th Fed Leicester 891 birds
26th Fed Kettering 360 birds
30th Fed Kettering 274 birds
Beaten on the trap many times by loftmates
"BLUE RAY" 18E20220
Sensational Racer and Dynamite Breeder.
He was a winner of :
1st Open NEPC Newbury 1,042 birds
2nd Fed Abingdon 826 birds
3rd Open NEPC Kettering 1,164 birds (beat by loftmate)
5th Federation Bedhampton 641 birds (beat by loftmates)
10th Open NEPC Buckingham 878 birds (beat by loftmates)
10th Fed Kettering 865 birds
10th Fed Buckigham 950 birds
25th Fed Abingdon 538 birds
"BROTHER RAY" 18E20246
Dynamite Full Brother of "BLUE RAY" Ace Sons of "SUPREME" x "JULIA"
Here's another very special Direct Son of the No.1 pair "SUPREME" x "JULIA"
Retired at 2 years of age as winner of :
3rd Federation Abingdon 826 birds
4th Federation Buckingham 950 birds
4th Open NEC Newbury 1,042 birds
5th Open NEPC Kettering 1,164 birds (beat by loftmate)
6th Federation Kettering 761 birds (beat by loftmates)
11th Federation Littlehampton 420 birds (beat by loftmates)
15th Federation Kettering 865 birds
"JULIA" is the Dam of the outstanding "BLUE RAY", "BROTHER RAY", "THE 499", "THE 500", "THE 335", "THE 853", "THE 365", "THE 773"
All super racers and winning at club, Federation and NEPC level
"The 499" 20-58499
A Direct Daughter of the No.1 mating of "SUPREME" x "JULIA"
This sister of "BLUE RAY" and "RAY'S BROTHER" is winner of
1st Open NEPC Upper Heyford 1,073 birds
3rd Fed Bovingdon 809 birds
3rd Fed Rugby 1,197 birds
4th Fed Holmsley 236 birds
6th Fed Reading 659 birds
14th Fed Holmsley 531 birds
15th Fed Newbury 519 birds
15th Fed Kettering 402 birds
23rd Open NEPC Kettering 1,182 birds
25th Fed Leicester 891 birds
26th Fed Kettering 360 birds
30th Fed Kettering 274 birds
Beaten on the trap many times by loftmates
"BLUE RAY" 18E20220
Sensational Racer and Dynamite Breeder.
He was a winner of :
1st Open NEPC Newbury 1,042 birds
2nd Fed Abingdon 826 birds
3rd Open NEPC Kettering 1,164 birds (beat by loftmate)
5th Federation Bedhampton 641 birds (beat by loftmates)
10th Open NEPC Buckingham 878 birds (beat by loftmates)
10th Fed Kettering 865 birds
10th Fed Buckigham 950 birds
25th Fed Abingdon 538 birds
"BROTHER RAY" 18E20246
Dynamite Full Brother of "BLUE RAY" Ace Sons of "SUPREME" x "JULIA"
Here's another very special Direct Son of the No.1 pair "SUPREME" x "JULIA"
Retired at 2 years of age as winner of :
3rd Federation Abingdon 826 birds
4th Federation Buckingham 950 birds
4th Open NEC Newbury 1,042 birds
5th Open NEPC Kettering 1,164 birds (beat by loftmate)
6th Federation Kettering 761 birds (beat by loftmates)
11th Federation Littlehampton 420 birds (beat by loftmates)
15th Federation Kettering 865 birds