barrel roll in 172

The issue is recovery from a botched barrel roll, such as in
inverted stall followed by a high speed dive and too strong
a pull on recovery.


"Big John" wrote in message
...
| Andrey
|
| As has been said in all the posts, the short answer is NO.
172 is not
| certified to do barrel rolls.
|
| However I can barrel roll a 172 only pulling 1 G which
puts no more
| load on airframe than straight and level flight. I have
thousands of
| hours to back up my statement.
|
| A corollary.
|
| Is a 707 certified for barrel rolls? Short answer is NO.
|
| Did a Boeing Test Pilot barrel barrel roll a 707 over the
boat races
| on Lake Washington without any damage to aircraft. YES.
|
| I'm also sure Dudley can barrel roll the 172 without any
problem or
| exceeding any limits.
|
| Long Long answer is don't try to B-roll the 172.
|
| My 1971 172/Skyhawk Owneers manual shows:
|
| Normal Cateory Maneuvers
|
| Max pos G' = 3.8
| Stalls and turns not to exceed 60 degrees of bank.
|
| Utility Caategory Maneuvers
|
| Max pos G's = 4.4
| Chandelles
| Lazy Eights
| Steep Turns
| Spins
| Stalls (Except whip stalls)
|
| Acrobatics that may impose high loads should not be
attempted.
|
|
| Big John
| `````````````````````````````````````````````````` ``````
|
|
| On 20 Jul 2006 04:34:44 GMT, Andrey Serbinenko
| wrote:
|
|
| If kept within the normal category load limits, is 172
certified to do
| barrel rolls?
|
| Andrey
|

Big John schrieb:

However I can barrel roll a 172 only pulling 1 G which puts no more
load on airframe than straight and level flight. I have thousands of
hours to back up my statement.

No, you can't do a barrel roll without pulling more than 1g.

Did a Boeing Test Pilot barrel barrel roll a 707 over the boat races
on Lake Washington without any damage to aircraft. YES.

No, it wasn't a barrel roll, it was an aileron roll. (At least this is
what I've been told, and it makes a lot of sense.)

Stefan

Did a Boeing Test Pilot barrel barrel roll a 707 over the boat races
on Lake Washington without any damage to aircraft. YES.

No, it wasn't a barrel roll, it was an aileron roll. (At least this is
what I've been told, and it makes a lot of sense.)

Someone correct me if I'm wrong, but isn't an aileron roll a negative 1 G
maneuver? You spin on an axis, through the plane's center of gravity. For
an instant, the pilot is upside down, hanging by the belt.

Mr. Boeing would not be pleased if all of the gas and oil was on the top of
the tank, away from the fuel and oil pickups.

The 707 roll was indeed a barrel roll. Check it out on Jay's webpage.
--
Jim in NC

In article ,
"Morgans" wrote:

Someone correct me if I'm wrong, but isn't an aileron roll a negative 1 G
maneuver? You spin on an axis, through the plane's center of gravity. For
an instant, the pilot is upside down, hanging by the belt.

Inertia, centrifugal force. Think three dimensional. You do not have to
maintain level flight. Pick a down-line. Altitude and gravity are your
friends, put the nose down. :-))

Morgans schrieb:

Someone correct me if I'm wrong, but isn't an aileron roll a negative 1 G
maneuver? You spin on an axis, through the plane's center of gravity. For
an instant, the pilot is upside down, hanging by the belt.

No. This is called a slow roll or simply a roll.

The 707 roll was indeed a barrel roll. Check it out on Jay's webpage.

Hardly an authoritative source.

Stefan

Morgans wrote

The 707 roll was indeed a barrel roll. Check it out on Jay's webpage.

Again....check the definition of a "barrel roll" at the web site posted
by Peter and my previous post. Big John, dispite his thousands of hours,
simply doesn't know what a "barrel roll" is. I'll put my Navy training and
22,000 hours and ATP/CFI ratings up against his anyday. :-) I've been
waiting for two years for John to post an authoritative source for his
concept of a "barrel roll".

http://www.iac.org/begin/figures.html#Aileron%20Rolls

Stefan

I'm glad your the expert.

I used to do half of a barrel roll at one G and give to student under
the hood upside down to recover.

Bird of course was acro rated but student couldn't tell we had rolled
inverted and we were pulling 1 G positive when handed over.

Big John
`````````````````````````````````

On Thu, 20 Jul 2006 21:35:26 +0200, Stefan
wrote:

Big John schrieb:

However I can barrel roll a 172 only pulling 1 G which puts no more
load on airframe than straight and level flight. I have thousands of
hours to back up my statement.

No, you can't do a barrel roll without pulling more than 1g.

Did a Boeing Test Pilot barrel barrel roll a 707 over the boat races
on Lake Washington without any damage to aircraft. YES.

No, it wasn't a barrel roll, it was an aileron roll. (At least this is
what I've been told, and it makes a lot of sense.)

Stefan

Big John schrieb:

I'm glad your the expert.

I'm far from being an expert, but I have an idea, yes.

I used to do half of a barrel roll at one G and give to student under

If you can actually do a barrel roll without exceeding 1g at any point,
then you should immediately inform your local university. Or, better
yet, directly the nobel commitee. Because you've just proved that some
very basic physical laws are wrong.

Stefan

Stefan

Have done many in real life.

Go to Google and research Barrel Rolls. You will find links that show
you can do them between 0.5 G's and max G's bird is certified for.

Beside these 'experts' who posted, all I can say is fly the airplane.
If you want 1 G then fly it that way. If you can't fly it that way
then don't get in bird as you are an accident waiting to happen.

Big John
``````````````````````````````````


On Fri, 21 Jul 2006 11:10:53 +0200, Stefan
wrote:

Big John schrieb:

I'm glad your the expert.

I'm far from being an expert, but I have an idea, yes.

I used to do half of a barrel roll at one G and give to student under

If you can actually do a barrel roll without exceeding 1g at any point,
then you should immediately inform your local university. Or, better
yet, directly the nobel commitee. Because you've just proved that some
very basic physical laws are wrong.

Stefan

Big John wrote:
Andrey

As has been said in all the posts, the short answer is NO. 172 is not
certified to do barrel rolls.

However I can barrel roll a 172 only pulling 1 G which puts no more
load on airframe than straight and level flight. I have thousands of
hours to back up my statement.

No you can not.

It's not possible to even start the roll without going greater
than 1G.