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#1
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Pitts questions
Hi-
I've a few questions concerning S1 types. The -C I know has an AEIO-320, with ailerons on the lower wing. The -S, I believe, has an AEIO-360 along with four ailerons. Must it also have a constant speed prop to be a true S1S? And how does the -S differ from the -T? Lastly, can anyone enlighten me on the differences, if any, between Aerotek and Aviat? TIA- Wendy |
#2
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Hi,
I have a list of Pitts types on-line on my aerobatics website at: http://acro.harvard.edu/ACRO in the section [Other Aerobatics Info]. Aerotek was the name of the company that produced the Pitts for a while. the company changed names a few times, the current one is Aviat. Guenther --------------------------------------------------- Dr. Guenther Eichhorn | ADS Project Scientist | Phone: 617-495-7260 http://ads.harvard.edu | Fax: 617-496-7700 Smithsonian Astrophysical Observatory 1815 Mass. Ave., MS-31, Cambridge, MA 02140, USA In article , "Wendy" writes: Hi- I've a few questions concerning S1 types. The -C I know has an AEIO-320, with ailerons on the lower wing. The -S, I believe, has an AEIO-360 along with four ailerons. Must it also have a constant speed prop to be a true S1S? And how does the -S differ from the -T? Lastly, can anyone enlighten me on the differences, if any, between Aerotek and Aviat? TIA- Wendy |
#3
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As already covered the 'S' has a fixed pitch prop and the 'T' has
constant speed. The S was also the beginning of the longer fuse. The S started with frise ailerons and later had the symetricals which all T's had. The T also came standard with 200hp (and electrical system) and the top wing is further forward to handle the extra weight of the prop and engine. There are a bunch of other little changes. Including, I believe, an angled front on the turtle deck. Martin Morgan Guenther Eichhorn wrote: Hi, I have a list of Pitts types on-line on my aerobatics website at: http://acro.harvard.edu/ACRO in the section [Other Aerobatics Info]. Aerotek was the name of the company that produced the Pitts for a while. the company changed names a few times, the current one is Aviat. Guenther --------------------------------------------------- Dr. Guenther Eichhorn | ADS Project Scientist | Phone: 617-495-7260 http://ads.harvard.edu | Fax: 617-496-7700 Smithsonian Astrophysical Observatory 1815 Mass. Ave., MS-31, Cambridge, MA 02140, USA In article , "Wendy" writes: Hi- I've a few questions concerning S1 types. The -C I know has an AEIO-320, with ailerons on the lower wing. The -S, I believe, has an AEIO-360 along with four ailerons. Must it also have a constant speed prop to be a true S1S? And how does the -S differ from the -T? Lastly, can anyone enlighten me on the differences, if any, between Aerotek and Aviat? TIA- Wendy |
#4
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There are a few other differences.
The T has a pressure cowl. That is the air exits from the bottom only. On the S, the cowl is open behind the cylinders to let air escape. The T does not have a bow/cutout in the upper wing above the cockpit. Its one straight piece. Presumably this is because the wing is further forward to help balance the engine/prop. Presumably the fuse attach points for the lower wing are different as are the locations of the aileron idler and bellcrank to accomadate the more forward position. Ihave not flown an S but I imagine the visibility is a bit better in the T due to a more forward wing. The T ailerons have spades. There are structural differences also. One of the easiest to see is the cabanes. On the S's the diagaonal cabane attaches to the upper forward vertical cabane but on the T it attaches to the rear upper cabane. Also, the T's incorporate a solid bar between the forward and rear cabane attach points to stop them from flexing. There are probably a lots of other sturctural beef ups many of which were later incorporated into uncertified S's. Peter Ashwood-Smith As already covered the 'S' has a fixed pitch prop and the 'T' has constant speed. The S was also the beginning of the longer fuse. The S started with frise ailerons and later had the symetricals which all T's had. The T also came standard with 200hp (and electrical system) and the top wing is further forward to handle the extra weight of the prop and engine. There are a bunch of other little changes. Including, I believe, an angled front on the turtle deck. Martin Morgan Guenther Eichhorn wrote: Hi, I have a list of Pitts types on-line on my aerobatics website at: http://acro.harvard.edu/ACRO in the section [Other Aerobatics Info]. Aerotek was the name of the company that produced the Pitts for a while. the company changed names a few times, the current one is Aviat. Guenther --------------------------------------------------- Dr. Guenther Eichhorn | ADS Project Scientist | Phone: 617-495-7260 http://ads.harvard.edu | Fax: 617-496-7700 Smithsonian Astrophysical Observatory 1815 Mass. Ave., MS-31, Cambridge, MA 02140, USA In article , "Wendy" writes: Hi- I've a few questions concerning S1 types. The -C I know has an AEIO-320, with ailerons on the lower wing. The -S, I believe, has an AEIO-360 along with four ailerons. Must it also have a constant speed prop to be a true S1S? And how does the -S differ from the -T? Lastly, can anyone enlighten me on the differences, if any, between Aerotek and Aviat? TIA- Wendy |
#5
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This post got me curious so I took a look at the fuse diagram of the S
v.s. the T. The cabanes have a different diagonal direction and have a solid bar across the top. The T has an extra (angled) bay in front of the front gear attach hinge. On the S, the gear attaches pretty much right where the motor mount attaches to the front of the frame. This makes the bungee arrangment on the T totally different. Probably 'easier' to change on a T than an S. The T has a number of extra diagonal cross braces in the fuse. Most notably behind/under the rear seat there are three extra braces on the floor. Looks like they beefed it up laterally, perhaps for snaps. Also beefier at the front with that extra diagonal bay. Probably far more info than anybody wants or cares about but hey, its crappy weather and looking at the diagrams beats watching T.V. Cheers, Peter As already covered the 'S' has a fixed pitch prop and the 'T' has constant speed. The S was also the beginning of the longer fuse. The S started with frise ailerons and later had the symetricals which all T's had. The T also came standard with 200hp (and electrical system) and the top wing is further forward to handle the extra weight of the prop and engine. There are a bunch of other little changes. Including, I believe, an angled front on the turtle deck. Martin Morgan Guenther Eichhorn wrote: Hi, I have a list of Pitts types on-line on my aerobatics website at: http://acro.harvard.edu/ACRO in the section [Other Aerobatics Info]. Aerotek was the name of the company that produced the Pitts for a while. the company changed names a few times, the current one is Aviat. Guenther --------------------------------------------------- Dr. Guenther Eichhorn | ADS Project Scientist | Phone: 617-495-7260 http://ads.harvard.edu | Fax: 617-496-7700 Smithsonian Astrophysical Observatory 1815 Mass. Ave., MS-31, Cambridge, MA 02140, USA In article , "Wendy" writes: Hi- I've a few questions concerning S1 types. The -C I know has an AEIO-320, with ailerons on the lower wing. The -S, I believe, has an AEIO-360 along with four ailerons. Must it also have a constant speed prop to be a true S1S? And how does the -S differ from the -T? Lastly, can anyone enlighten me on the differences, if any, between Aerotek and Aviat? TIA- Wendy |
#6
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Wendy,
The S-1Cs are homebuilts and so they might have almost any engine on them... but the original idea was for them to use the 85 hp Continental... the 'C' was for Continental. In actual practice a LOT of these things had 125 hp Lycoming O-290Gs on them. The 'G' was for Ground Power Unit. There were lots of these on the market, real cheap when that plan set was released. They needed some crankshaft mods to work, and some guys sprung for the aircraft crank, which held together much better than the modified GPU crank. I've never seen a GPU crank on one myself... I'm pretty sure they all got aircraft parts by now. Besides, the IAC won't allow the GPU cranks in competition. But, remember, you could see almost any engine on a -C, up to maybe a 200 hp Lycoming. BTW, most builders seem to have lengthened these things a bit thru the cockpit area... they were just a bit too tight for most folks. The S-1S was the first type-certified Pitts. The 'S' was for symmetrical, meaning it had symmetrical airfoils on the wings. Note that the wings had symmetrical airfoils, but the ailerons did not have symmetrical sections... they were the Friese type. It's fuselage was a bit longer, there are four ailerons and the engine is the good ol' 180 hp Lycoming AEIO-360, with a fixed metal propeller. (a side note is in order here...The S-1E was the name the factory used on its plans for the homebuilt -S. I believe the main difference between an -S and an -E was the use of wood for the turtledeck and ailerons on the homebuilt -E, metal on the factory airplanes. Of course, a homebuilder could buy the metal parts and use them. The hangup here is, lots of those planes that were built by homebuilders from the -E plans got registered with the FAA as -Ss... confusing? A homebuilder can call his plane whatever he likes, and there are a fair number of -Ss out there that are actually homebuilts) The S-1T was like an -S that had been lenghtened just a bit more, had symmetrical ailerons and a 200 hp AEIO-360, with a Hartzell constant speed propeller. The constant propeller was supposed to be used to meet noise requirements for certification. If you're really looking at the differences, the cabane structure was a bit different from the -S... the two diagonals ran the other way. I think the rudder was a bit bigger. Some folks still think the -S is the best single seat Pitts ever for it's combination of simplicity, low weight and agility and relatively low cost. Aviatt owns the Pitts and Husky lines these days. If I remember right, Aerotek was the company that put the Pitts into production and did the parts and tech support for the Pitts planes, until Frank Christen bought it. Hmmm, that may be a bit garbled. Anybody smart on this? I'm an old A & P that used to make my living wrenching on those funny little dehydrated biplanes. I loved 'em and I still do. I hope this helps, and I hope it's not too much more than you needed to know. Fight Gravity! j. "Wendy" wrote in message ... Hi- I've a few questions concerning S1 types. The -C I know has an AEIO-320, with ailerons on the lower wing. The -S, I believe, has an AEIO-360 along with four ailerons. Must it also have a constant speed prop to be a true S1S? And how does the -S differ from the -T? Lastly, can anyone enlighten me on the differences, if any, between Aerotek and Aviat? TIA- Wendy |
#7
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I'm an old A & P that used to make my living wrenching on those funny
little dehydrated biplanes. I loved 'em and I still do. I hope this helps, and I hope it's not too much more than you needed to know. Fight Gravity! j. Mate, it was just what I wanted to hear. Can anything be done to make them STOL a bit? Or something as much fun that can STOL (1000 feet grass) and be built in the shed? Peter |
#8
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I regularly fly my S1S, which happens to be the first certified (factory
built) Pitts, into and out of an 1800' grass strip that a friend lives next to, and I don't use it all. I like it when they don't cut the grass when I land, but short grass is better going out. I wish I had the photo I have in my hangar to post here. It shows an F-16 in a tractor shed on a farm. Anything can be STOL in the right circumstances. Jim Klick S1S N9JT Mate, it was just what I wanted to hear. Can anything be done to make them STOL a bit? Or something as much fun that can STOL (1000 feet grass) and be built in the shed? Peter |
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