How would a Wing Chun fighter defend against a Brazilian Jiu-Jitsu fighter or grappler?

I'm in an interesting position because I regularly run pummeling/takedown drills against two Wing Chun guys from two unrelated schools.

Their pummeling skills are on par with most of the grapplers, but instead of using it to close distance, they're using it to create distance. They're also pretty good at using their body positioning to turn our force aside and vacate the space we're moving in to. But, sooner or later, we're able to collapse the distance and get into a good clinch. Consider these guys outweigh us by 30lbs or so, generally.

The most successful takedowns have been, for me, a low single leg. I have a friend who's very skilled in Judo who unbalances them with repeated foot sweep attempts. The final option is to go for a leg scissors motion; I'm pretty good at leg locks, so I'm OK with this, but I'd rather get a good takedown that will put me in a top position instead of trying to slide-tackle a guy.

Finally, on the "chain punching" thing, it's actually not particularly effective. They're not knockout punches, just "bother me" punches. Moreover, the reaction to being punched in the face is to shell up, leaving a nice, solid top of the skull for a Wing Chun guy to punch. That's not going to do anything but hurt their hand.

I say neither. If both are proficient at their art, then both would avoid fighting the other man's fight.. hence neither could actually "engage." Wing Chun is very quick, very powerful, and works well in close range. The way WIng Chun utilizes "bar" arm and jamming techniques would prevent a lot of control and grab attempts. BJJ is primarily a ground style, so they would have to close the gap, enter, and take down to be effective. Why would a wing chun practitioner go to the ground to fight, when they are so dominant on their feet. Vice versa, why would a BJJ practitioner stay on their feet, when they are so dominant on the ground. I'm also understanding that almost ALL traditional arts (even TKD) when taught properly. Have locks, takedowns, and joint manipulation techniques. They are usually hidden in kata and forms (explains why most instructors aren't aware of them.) So just like a BJJ fighter would have some striking ability, a Wing Chun guy will have some "grappling" ability as well.

Depends on the Wing Chun fighter, If the Wing Chun fighter trains in grappling also then he would fair better. Pulling hair or poking a grappler in the eyes won't stop a grappler if they have you on the ground. Remember a grappler can do those things to you also, and they have the advantage on the ground. There is more to grappling then just single leg or double leg take downs. If you don't want to be taken down to the ground or worry about what you would do if you end up there, then train in a grappling art along with your Wing Chun plain and simple. Just like Wing Chun, you'll need to train in grappling arts on a regular basis. Its not something you'll learn in a couple months then declare yourself grappling trained.

I am wing chun fan but unlike 90% wing chun fans I look on things objectively. BJJ is trained to get someone down. It is what bjj is all about- getting someone on ground and continue from there. WingChun is trained how to avoid that, but all so they are trained to do many other things.

Boxers are trained to use only fists. Kick boxers are trained to use all so legs. In boxing mach kick boxer will loose. Same with wingchun.

Art, which is more universal will loose in one particular category to other art which mastered that category.

WingChun guy spend only 10% of theyr time learning how to avoid takedows while bjj guy spend 80% time on learning takedows. BJJ guy will be better at takedows than wing chun guy at deflecting takedows.

But if you want to know how to try to defend, I would say simple chain punches. Look how they usually try to take down you at mma. They go low and try to grab your waist or legs. At this moment they are off-guard, since they need arms to take you down. When they reach for your waist or legs start chain punching with steeping forward.

When opponent is moving at you and you punch him with MOVING forward yourself, there will be bigger damage. If opponent simply stands when you punch him damage will be two times less than if he would move at you. It means, that if you can punch guy in moment, where he comes at you, damage will be 2 times bigger (but you allso mus be moving at him, like 2 cars when they both crash in each other) + doing takedows they are off-guard and looking/concentrating at your legs not arms. Analyzing all this, the BEST and most PRACTICALLY salutation is to chain punch guy when he try to do takedown.

Bil gee wing chuns thrusting fingers to eyes and then stomp him. BJJ loves to lay on there back, so football kick them.

Using Chin na.

-_-

He would punch him.