Safety of wheel in vertical dropout?

I used the search and could only find threads about chain tension relating to vertical dropouts but what i'm worried about is, will my wheel be likely to pop out of the dropout? The way i see it, if i lock up or resist pedals it's the bottom run of chain doing the pulling and that would be trying to pull the wheel down as well as forward no?

The bike is a Trek District (sliding vertical dropouts) which i'm thinking about making fixed by using a mtb rear disc hub. (I will use a bolt on cog and chain for fixed duties and i'l keep the pulley on the freehub side so that if i want to change back to belt drive it's an easy job)

I could get a converted hub from velosolo which would use a nutted axle or i could convert a hub myself but if possible id like to keep the allen key skewer that the bike uses just now.

Obviously the nutted hub would be more secure but if anyone is running a skewered wheel in a vert dropout and can tell me that they have no problems with the wheel moving then il probably go for that.

Lots of people use a WI ENO with vertical dropouts. I've not heard of any problems.

If Sheldon can do it.. so can you..
http://sheldonbrown.com/fixed-conversion.html#vertical

Lots of people use a WI ENO with vertical dropouts. I've not heard of any problems.

I thought of that but was concerned that the shape of the axle on the ENO might prevent it from rolling out the dropout if you see what i mean?

Yes, but you'll note that Sheldon and I'm sure a lot of others out there have run various bodges to get around this.

Your weight is on the bike holding the wheel in too. And as you skid over the ground isn't that opposing your foot resistance? Anyway I don't do physics.. I'm just saying I've not heard of many/any people popping wheels out of vertical dropout fixed setups.

Tighten bolts, STFU.

I used the search and could only find threads about chain tension relating to vertical dropouts but what i'm worried about is,** will my wheel be likely to pop out of the dropout?**

No.

Next!

Chain tension is about 10 times (depending on sprocket size) the horizontal reaction at the tyre/road contact, normal load at the contact patch is about 3 times the horizontal reaction (for μ=0.33, a tolerable approximation), the resultant of these 3 forces plus the (unknown) dropout reaction is zero if the wheel is not accelerating. It's an elementary problem in mechanics which anybody with O level maths will be able to solve. You don't even need to have a clue about the absolute magnitude of the forces, just their ratio.

'Coefficients of friction range from near zero to greater than one – under good conditions, a tire on concrete may have a coefficient of friction of 1.7.'

Just sayin'

Not when it's sliding, although it will briefly transition through the maximum as it reaches the adhesion limit. Doesn't affect the outcome of the calculation though, the dropout reaction is still much smaller than the wheel pull out force.

Yep. I agree. Just liked the 2 decimal placees! Most of the push pull is lateral not vertical. Track bolts plus gravity will suffice to keep it in place. As long as the dropout is in good nick.

It wasn't really two decimal places, it was 1/3 and idleness preventing me from writing it as a fraction.