Strafing breath question

[Invader]

If a dragon has a flight speed of 150ft and a 30ft cone breath weapon what are the measurements of the effected area and how does the height from which it breathes effect the size of its using strafing breath?

[Sliver]

If the dragon breathes from 30ft high, he can a 60ft wide 75ft long line, with both sides of that line ending with a 30ft radius half-circle.

http://i.imgur.com/UQLxLiR.png

Every 5ft lower, the width of the line is reduced by 10ft and the half-circles shrink accordingly.

[Invader]

If the dragon breathes from 30ft high, he can a 60ft wide 75ft long line, with both sides of that line ending with a 30ft radius half-circle.

http://i.imgur.com/UQLxLiR.png

Every 5ft lower, the width of the line is reduced by 10ft and the half-circles shrink accordingly.

And if he moves higher would it fail to reach the ground?

[Sliver]

Indeed. 10chars.

[Invader]

Thank you sir

[InvisibleBison]

If the dragon breathes from 30ft high, he can a 60ft wide 75ft long line, with both sides of that line ending with a 30ft radius half-circle.

Every 5ft lower, the width of the line is reduced by 10ft and the half-circles shrink accordingly.

This does seem to be how it would work in reality, but looking through the Monster Manual and the Draconomicon, I can't find any rules to back it up. Using a breath weapon takes a standard action (MM p. 69), so a dragon can't move and breathe simultaneously. Thus, a dragon's breath weapon always takes the same shape, even when the dragon is flying around the battlefield.

If you can show me how this is wrong, please do so - the situation you describe is both more realistic and cooler!

[Invader]

This does seem to be how it would work in reality, but looking through the Monster Manual and the Draconomicon, I can't find any rules to back it up. Using a breath weapon takes a standard action (MM p. 69), so a dragon can't move and breathe simultaneously. Thus, a dragon's breath weapon always takes the same shape, even when the dragon is flying around the battlefield.

If you can show me how this is wrong, please do so - the situation you describe is both more realistic and cooler!

The prereqs for strafing breath are flyby attack and flyby breath.

[Sliver]

This does seem to be how it would work in reality, but looking through the Monster Manual and the Draconomicon, I can't find any rules to back it up. Using a breath weapon takes a standard action (MM p. 69), so a dragon can't move and breathe simultaneously. Thus, a dragon's breath weapon always takes the same shape, even when the dragon is flying around the battlefield.

If you can show me how this is wrong, please do so - the situation you describe is both more realistic and cooler!

Strafing Breath is a feat from the Dragonlance Campaign Setting book.

[InvisibleBison]

Strafing Breath is a feat from the Dragonlance Campaign Setting book.

I see. Thanks for the info!