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Why does a flat top equal more stable?

Questatement

Double Eagle Member
Joined
Feb 7, 2013
Messages
1,332
Location
So. Cal.
I finally got my hands on an OS, board flat disc (CE Valk) that has excellent glide and found some wind to throw it into yesterday. I noticed that my nearest equivalent disc (star Orc) flew almost identical down wind and/or down-to-side wind but much less stable into the wind than the Valk.

Could it be the domier disc catches more of the wind due to surface resistance?
 
this applies differently to each mold. Some with dome with be more HSS some will be less. Some will have more LSS other will have less. There is no one rule in regards to dome which applies to every mold but does touch on the last part you mention-- the effects on flight however will be variable.

Depending on the PLH and overall speed of disc-- dome vs flat will impact flight differently.
 
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lol.. nope

Understable molds would appear to fly more OS when flat due to generally lower PLH the flattening actually raises shoulder height slight. I don't find this rule to follow suit with OS discs as some domey bosses do not have the same HSS as flat tops but then domey forces have a ton of LSS compared to flat.
 
I've never seen two discs fly as identical as these two (other than into wind as I mentioned) unless they were the same everything, incl. the run.
 
Yeah different stages of wear is likely the culprit there. Orc and Valks are known to be all over the place in regards to stability so very possible they are twins being similar molds already.
 
if they looked identical they wouldn't fly similar really-- that only would apply with the same molds.

those pictures tell me the Orc has a lower PLH which means it could act more squirlly in a headwind but being a faster disc with more beef to it in general its actually flying more like a valk and your valk is flying more like a beat orc.
 
I think I'm getting it.

Either way, the Orc goes and the Valk stays since the latter doesn't need adjustments for wind.
 
All of my CE valks are pretty flat and a notch more stable, which is not exactly what I like in a valk. Too bad all of the new ones I keep seeing are high plh plus mold feeling duds
 
I have a newer champ Valk that flies like it's suppose to but what a boring line. I still use it but yawn...

Maybe when it beats in to less stability?
 
It differs from one mold to another. Flat Firebirds are more overstable than domier ones. Whereas Destroyers that are flatter. Midranges tend to be more stable when they are domey. Fairways tend to be more stable when flat, and distance drivers tend to be more mold dependent. Prodigy drivers are more stable when flat, Innova drivers are more stable when domey.

But in general its good to just check with others for each individual mold.
 
I'm gonna ruffle some feathers but flat top does not equal more stable
It does mean faster however as the flatter a disc is the more it will reach a high speed

Here's where many get confused

More dome equals more glide so a disc will have a slower longer hang time
Less dome it will fly faster often times into the ground hard fade lol

In a weaker arm an Avery destroyer in all it's domey glory will travel slower due to poor aerodynamics and behave more piggy beefy over stable due to it not getting up to speed and thus not reaching enough speed to reach it's turn and glide potential

Likewise a flat top roc will typically turn late on it's flight compared to a kc pro because it is easier to overpower

Sorry to ruin everyone's paradigm but it really comes down to your arm speed more so than plh
 
I don't disagree with that and was not trying to say flat = OS

Except to say it really comes down to speed over PLH. They do go hand in hand as many discs with a very high PLH and flat tops like resistor, flick, faf FB's, xcal etc all are notoriously OS. Its much easier to decipher the stability with that over dome or flat.
 

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