Today's Message Index:
----------------------
1. 01:41 PM - Re: Sky Scout Plans (taildrags)
2. 02:12 PM - Re: Re: Sky Scout Plans (Steven Dortch)
3. 02:53 PM - Re: Re: Sky Scout Plans ((null) raykrause)
4. 06:49 PM - Re: Re: Sky Scout Plans (Richard Schreiber)
5. 08:20 PM - Re: Sky Scout Plans (taildrags)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sky Scout Plans |
Just measured the deck angle of my airplane with it sitting on the ground in 3-point
attitude: almost exactly 11 degrees. Knowing now that my wing is set with
about 1 degree less incidence than it should have, I think I need to get the
nose a bit higher. I had already been thinking about getting some slightly
fatter tires (does anybody happen to know what size tires are on NX13691, "The
Allen Rudolph Piet"?)- mine are 6.00x6 and I'm looking at some 8.00x6 weenies.
Somewhere or the other I have a comparative analysis of the Piet airfoil vs. the
Cub's USA35B and I'm curious as to what the lift looks like vs. the Piet at
the same angle of attack. Jack wrote that the Cub has a 13 degree deck angle
and that puts the wing close to the critical AOA, so I should be able to get
some good info out of that comparison.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=473170#473170
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sky Scout Plans |
Oscar, to get 15 degree deck angle, I had to jack my Pietenpol up quite a
bit. I will check the angle when I go out next.
Blue Skies,
On Wed, Sep 27, 2017 at 3:41 PM, taildrags <taildrags@hotmail.com> wrote:
>
> Just measured the deck angle of my airplane with it sitting on the ground
> in 3-point attitude: almost exactly 11 degrees. Knowing now that my wing
> is set with about 1 degree less incidence than it should have, I think I
> need to get the nose a bit higher. I had already been thinking about
> getting some slightly fatter tires (does anybody happen to know what size
> tires are on NX13691, "The Allen Rudolph Piet"?)- mine are 6.00x6 and I'm
> looking at some 8.00x6 weenies.
>
> Somewhere or the other I have a comparative analysis of the Piet airfoil
> vs. the Cub's USA35B and I'm curious as to what the lift looks like vs. the
> Piet at the same angle of attack. Jack wrote that the Cub has a 13 degree
> deck angle and that puts the wing close to the critical AOA, so I should be
> able to get some good info out of that comparison.
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power, 72x36 Culver prop
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=473170#473170
>
>
--
Blue Skies,
Steve D
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sky Scout Plans |
Oscar,
So at what deck angle do most Piets stall? Did I miss something? My SkyScou
t's 3-point deck angle is 14-14.5 degrees. Seems pretty steep. My 7AC is ab
out 12 degrees and I don't know where it stalls power-off. But it seems quit
e a bit higher that the 3-point angle.
I will have to deflate my tires a bit....since the brakes might be pretty lo
usy! I will test taxi as soon as I patch a hole in the wing. Damn antenna o
n the Waiex!
Does anyone remember the pounds of pull on the "Official Fish Scale" that ha
s been ruled to be adequate? I don't have the "Official" scale. But one simi
lar! Could not be too far off!
Ray Krause
Sent from my iPad
> On Sep 27, 2017, at 2:10 PM, Steven Dortch <steven.d.dortch@gmail.com> wro
te:
>
> Oscar, to get 15 degree deck angle, I had to jack my Pietenpol up quite a b
it. I will check the angle when I go out next.
>
> Blue Skies,
>
>
>> On Wed, Sep 27, 2017 at 3:41 PM, taildrags <taildrags@hotmail.com> wrote:
>>
>> Just measured the deck angle of my airplane with it sitting on the ground
in 3-point attitude: almost exactly 11 degrees. Knowing now that my wing i
s set with about 1 degree less incidence than it should have, I think I need
to get the nose a bit higher. I had already been thinking about getting so
me slightly fatter tires (does anybody happen to know what size tires are on
NX13691, "The Allen Rudolph Piet"?)- mine are 6.00x6 and I'm looking at som
e 8.00x6 weenies.
>>
>> Somewhere or the other I have a comparative analysis of the Piet airfoil v
s. the Cub's USA35B and I'm curious as to what the lift looks like vs. the P
iet at the same angle of attack. Jack wrote that the Cub has a 13 degree d
eck angle and that puts the wing close to the critical AOA, so I should be a
ble to get some good info out of that comparison.
>>
>> --------
>> Oscar Zuniga
>> Medford, OR
>> Air Camper NX41CC "Scout"
>> A75 power, 72x36 Culver prop
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=473170#473170
>>
>>
>>
>>
>>
>>
>> =========================
>> br> enpol-List" rel="noreferrer" target="_blank">http://www.matronics
.com/Navigator?Pietenpol-List
>> =========================
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> =========================
>> WIKI -
>> errer" target="_blank">http://wiki.matronics.com
>> =========================
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contributio
n
>> =========================
>>
>>
>>
>
>
>
> --
> Blue Skies,
> Steve D
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sky Scout Plans |
Oscar,
There was some discussion at Brodhead this year about this very thing.
The few builders I talked to all agreed that the critical AOA on a Piet
should be around 12.5 degrees for the deck angle. That being said , many
Piets are much less than that. On mine, my deck angle is 12.5 degrees.
With all the stuff I have under the tail post ---"A" frame, spring and
tail wheel, I had to make my gear legs a little longer to go that high.
NX478RS flys well, but there is no way I can step into the rear pit
without an attached step.
Rick Schreiber
NX478RS
Valparaiso, IN
On 9/27/2017 3:41 PM, taildrags wrote:
>
> Just measured the deck angle of my airplane with it sitting on the ground in
3-point attitude: almost exactly 11 degrees. Knowing now that my wing is set
with about 1 degree less incidence than it should have, I think I need to get
the nose a bit higher. I had already been thinking about getting some slightly
fatter tires (does anybody happen to know what size tires are on NX13691, "The
Allen Rudolph Piet"?)- mine are 6.00x6 and I'm looking at some 8.00x6 weenies.
>
> Somewhere or the other I have a comparative analysis of the Piet airfoil vs.
the Cub's USA35B and I'm curious as to what the lift looks like vs. the Piet at
the same angle of attack. Jack wrote that the Cub has a 13 degree deck angle
and that puts the wing close to the critical AOA, so I should be able to get
some good info out of that comparison.
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power, 72x36 Culver prop
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=473170#473170
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sky Scout Plans |
Steve D.- never said I wanted to get 15 degrees. Others have said that anything
over 13 is probably excessive. That sounds like it's been echoed by several
others, including Rick's comment about a general agreement from others about
12.5 degrees being the target.
Rick S.- my airplane has a step for getting into the rear cockpit... never tried
"giant stride" stepping into it! And since my deck angle is at 11 degrees,
my airplane is about 1.5 degrees nose-down from optimum for full-stalling it in
the 3-point attitude. However, my wing is also set at 1 degree *less* incidence
than the plans call for, so now my wing is about 2.5 degrees nose-down from
optimum. I'm going to try some larger tires (wanted to anyway), but just studying
it in AutoCAD, I'll probably only get 1 to 1.5 degrees more deck angle,
so I'll still be short of optimum but should be better. This is experimental
aviation!
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=473176#473176
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|