BodyVelocitys won't make model hover, wut da hek? [SOLVED]

for i, p in pairs(model:GetDescendants()) do
    if p:IsA("BasePart") then
        local Vel = Instance.new("BodyVelocity")
        Vel.Velocity = Vector3.new(0, 0, 0)
        Vel.Name = "Velocity"
        Vel.MaxForce = Vector3.new(4000, 4000, math.huge)
        Vel.Parent = p
        _S.CollectionService:AddTag(Vel, "VelocityObject")
    end
end

So...

I have a train for going into the glitchlands (blab blab blab)

So this portion of a regular script creates BodyVelocitys on all of the parts in the script, of which are meant to keep the train mid-air when the support is removed, and to later propel the train into the Glitchlands...

But for some reason:

The train just goes flop!

And that's even if I replace the code there with this!

for i, p in pairs(model:GetDescendants()) do
    if p:IsA("BasePart") then
        local Vel = Instance.new("BodyVelocity")
        Vel.Velocity = Vector3.new(0, 50, 0) * p:GetMass()
        Vel.Name = "Velocity"
        Vel.MaxForce = Vector3.new(4000, 4000, math.huge)
        Vel.P = 500000000
        Vel.Parent = p
        _S.CollectionService:AddTag(Vel, "VelocityObject")      
    end
end

And I can confirm the BodyVelocitys function later on in the script (partially): when the BodyVelocitys are set to propel the train, they do propel it.

So yea, what the heckies?

Shouldn't the BodyVelocitys keep the train mid-air?

(FYI, the train is kept in a Model, and has multiple folders for organization.)

EDIT: nvm just needed to increase max force