Adarq.org

Nice front squat.
Do you usually dunk on outdoor/concrete courts? Aside from the ring being higher there could be another reason why it's harder to dunk. I think your body gets used to jumping on concrete so than when you jump on hardwood it's harder coz your body isn't used to it. That's what I found even though most people say they can jump higher on hardwood (maybe that's another reason why my knees get fuked up- always jumping on concrete).

Nice one vag, let me plug in the numbers and see what comes out. I am starting to think it's better to work with time t=t* where t* is the time taken taken to reach the peak rather than total airtime. This is because I can get the exact frame where the peak occurs - which saves having to work out which frame is where one lands which is more subject to error.

The other thing i'm not positive about is - do you take the first frame F_0 when you are airborn? Or when the heel visibly begins to rise? Not sure.

First frame airborn, thats when the 'constant linear acceleration' begins, which is actually decelerating with constand acceleration factor -g. When heels start to rise, you are still building up your initial velocity, you are in the previous, undetermined, motion. 2 more general reccomendations:
-For dunks don't use the full hangtime formula, hangtime is distorted ( inflated ) from rim contact. Use that only for 'clean' jumps.
-The hangtime formula calculates the distance you traveled from toes off, what we call verticall is from heels down, you need to do that correction. You need to add that difference, for me its 5''
More info here : http://www.adarq.org/strength-power-reactivity-speed-discussion/about-the-hangtime-based-vertical-jump-calculators/msg2158/#msg2158 , more analysis at the youtube video description.

The initial velocity is being thrown out of the equation because it can be expressed as a function of height and time. It was the equation [2] a few posts above. That's why you have to time from first frame airborn, to make sure that this equation is valid , while on the ground, what is happening cant be determined.
Also , the jump is never actually vertical , that induces a factor equal to the cosinus of the jumping angle ( e.g 10 degrees angle , cos = 0.984 , 1.6% error ).
I don't use the hangtime formula. It just gives you a good estimate.  I only used it when i could not determine my jumps otherwise ( tracking depth jumps performance at home ).
What i use is how higher i got above a measured rim. That can never lie.

Well it looks like you are getting exactly a clean hand above rim at that SVJ.  For your height i would guess a 9'' hand. With your 98'' reach that equals to 31'' of vert if we assume the rim is legit 10'. Calculator gives 26'' so there you go , 5'' correction according to my theory, verified. Measure your flatfooted vs up-on-toes-reach and i bet you will find it at 5''.
Sorry for hijacking your journal, if you find this annoying let me know so i delete the posts and take it to the hangtime thread.

The dunk attempt SVJ is lower but it doesn't count as the ball in the hands ruins the hands windup and the highest reach at peak. Unless we are talking about kingfish but he is not human anyway.
Let's stick to the 1st SVJ video. Around 30'' is my estimation, and i am arrogant enough to say i am the certified eye-vertec of adarq.org! 
Your reach is probably ~99'' in shoes, so wrist at 10' rim is 29''. Now this rim could be a bit lower OR a bit higher , it looks legit compared to your height. Also you won't find gym rims more than 2'' different than 10', you can tell from the first look if they are higher than 10'2'' or lower than 9'10''. So my estimation is 29'', no way lower than 27'', no way higher than 31''.

Training
FS 1x90, 1x100, 4x105 (PR), 4x97.5, 5x90
BS 3x90, 6x97.5, 6x92.5
DBBP 3x22.5, 8x27.5 (PR), 8x25, 10x20
DIPZ 3x15 (PR- b00m!)
JUMPZ 10 SVJ, 5 RVJ (PR - first double hand SVJ dunks)

BW: ?? (I'd say ~76kg or so but I've not been weighing myself)

FS notes:
So here is the thing, at the gym I can only go up in 2.5kg jumps since I don't have my 1/2kg plates from home. So I had to jump to 105 from my 102.5kg PR from last week. I got 4 reps!! I could have ground out an ugly 5th but it's only monday! So i kept a rep in the tanky and will go for it on weds or friday, whichever feels rite. I was surprised because I thought i would be really weak.

Now if you're taking notes you'd realise I have to work super hard to get a 1/2kg pr on front squats. And today I just got a 2.5kg improvement since last week, wtf? I think it's the trap bar dl i did last week. They've beefed up my lower back some, which has helped with my front squat. This tells me what I already suspected, my back is a weak point, i should be trap bar deadlifting over 4 plates with my long ass arms (esp since i've done 170kgx5 with conventional dl a few years bak when i used to dl).
BS notes:
Just putting in the werk. I wanted to go for another set but I thought fuck it i'm gonna save my legs for jumping.

Jump notes:
Got my first double hand SVJ dunks today. Feels good man. I guess i was just too heavy/fatigued last week? I could dunk today even after doing 25 odd squats before hand. Once my fat ass is down to 72kg i'll be jumping much higher... just gotta be faithful to my diet now.

I have video but it was soo  dark i doubt it will work once youtube runs its recompression algorithms over my footage. we'll see if it looks ok i'll update the post.

^ i ran a brightness filter thru the original footage which was too dark. if you watch either video, be sure to put it on 480p setting first because otherwise it pixellates too much.

---

I wanted to do weighted chins but the db bp & dipz killed my triceps and i can't do chinups. so note to self, make sure to do them on wednesday.

Congrats on the SVJ dunks. You make it look so easy.