Sig Smith Miniplane build
08-13-2014, 05:48 AM
#1177
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#1 Son has jumped on his birthday gift with Pop's wonderful scroll saw and amazed everyone with his saw skills.
And another SMP begins it's journey.
Nick
And another SMP begins it's journey.
Nick
08-13-2014, 12:27 PM
#1180
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We had a really good day at the field today.
After 45 minutes of break in time on the ground, we put the Magnum Blue head in the air with the rpm richened down from 9800 to 8800 and she ran and idled great.
PS. I wasn't flying that bad, the wind was pretty gusty.
Nick
https://www.youtube.com/watch?v=OdKuJ9lImD0&feature=youtu.be
08-13-2014, 01:00 PM
#1183
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Hey guys you really want to have fun with the smith, I have had about 7 of these and sold most of them after a gazillion flights and i just love it. So about 20 years ago i built the one you see in the photo
it is a replica of my dads full size, it is about 40% and let me tell you i have flown many a biplanes and this is the most fun plane, very very very forgiving and i will tell you why, my first flight with this plane
was VERY tail heavy and that is because I increased the fuse about 6" longer and opps forgot about CG I flew this plane and new right off the bat it was tail heavy and came home with the same plane
over 20 years ago I added 21oz to the nose that is how tail heavy it was but still flew of course a little tail down and very glad the engine stayed running, here is a picture of it now 20 years later it is scratch
built and a beautiful flyer now with a 50cc in it.
just get your plains and blow them up.
my dads full scale was exactly like this, just a little bigger not much
here is a picture of it with my mom 1964.
and here is a link to what it looks like today and still flying https://www.flickr.com/photos/mdl_ph...n/photostream/
it is a replica of my dads full size, it is about 40% and let me tell you i have flown many a biplanes and this is the most fun plane, very very very forgiving and i will tell you why, my first flight with this plane
was VERY tail heavy and that is because I increased the fuse about 6" longer and opps forgot about CG I flew this plane and new right off the bat it was tail heavy and came home with the same plane
over 20 years ago I added 21oz to the nose that is how tail heavy it was but still flew of course a little tail down and very glad the engine stayed running, here is a picture of it now 20 years later it is scratch
built and a beautiful flyer now with a 50cc in it.
my dads full scale was exactly like this, just a little bigger not much
here is a picture of it with my mom 1964.
08-13-2014, 01:35 PM
#1186
I really hate to admit this, but #1 son just turned 37. As for me, I'm a little older.
We had a really good day at the field today.
After 45 minutes of break in time on the ground, we put the Magnum Blue head in the air with the rpm richened down from 9800 to 8800 and she ran and idled great.
PS. I wasn't flying that bad, the wind was pretty gusty.
Nick
https://www.youtube.com/watch?v=OdKuJ9lImD0&feature=youtu.be
We had a really good day at the field today.
After 45 minutes of break in time on the ground, we put the Magnum Blue head in the air with the rpm richened down from 9800 to 8800 and she ran and idled great.
PS. I wasn't flying that bad, the wind was pretty gusty.
Nick
https://www.youtube.com/watch?v=OdKuJ9lImD0&feature=youtu.be
08-13-2014, 05:05 PM
#1187
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Your runway looks a lot like mine, even the notch in the tree line.
Being we have Stone mountain about 4 miles to our WNW, we get some interesting turbulence, but it keeps you in practice.
Nick
08-13-2014, 06:45 PM
#1188
Built one of the Sig Miniplanes back about 1980. Gave it away for about 50 bucks as I recall since I was moving to larger planes. Then found a plan for a larger version - twice the Sig size at 88" wingspan. All the wood was properly sized and so on. It was not just the Sig plan enlarged.
Still have that one in my stash. Will dig it out and give you guys the source.
Still have that one in my stash. Will dig it out and give you guys the source.
08-13-2014, 08:32 PM
#1189
Built one of the Sig Miniplanes back about 1980. Gave it away for about 50 bucks as I recall since I was moving to larger planes. Then found a plan for a larger version - twice the Sig size at 88" wingspan. All the wood was properly sized and so on. It was not just the Sig plan enlarged.
Still have that one in my stash. Will dig it out and give you guys the source.
Still have that one in my stash. Will dig it out and give you guys the source.
08-14-2014, 06:16 PM
#1191
OK, here's the info, straight off the plans.
First though, 2.4, you are partially correct. Osborne inked and put out the plans. The design credit, as noted on the plans, is for J.A. South
Here we go:
88" span, 2600 square inches area, weight 25lbs. Quadra 35, fully cowled, side mounted shown.
Inked by Harold Osborne, 1932 Conejo Lane, Fullerton CA 92633, dated October 11, 1979
Scale 5.25" = 1' 0"
2 sheets
Noted on the fuselage sheet by the cowl is this: Fiberglass cowl and wheel pants from James Jeffery, 128 Gibralter Dr., Germantown Ohio 45327
First though, 2.4, you are partially correct. Osborne inked and put out the plans. The design credit, as noted on the plans, is for J.A. South
Here we go:
88" span, 2600 square inches area, weight 25lbs. Quadra 35, fully cowled, side mounted shown.
Inked by Harold Osborne, 1932 Conejo Lane, Fullerton CA 92633, dated October 11, 1979
Scale 5.25" = 1' 0"
2 sheets
Noted on the fuselage sheet by the cowl is this: Fiberglass cowl and wheel pants from James Jeffery, 128 Gibralter Dr., Germantown Ohio 45327
Last edited by do335a; 08-14-2014 at 06:53 PM.
08-17-2014, 05:52 PM
#1193
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I just finished mine, Eflight 46 brushless motor with 60 amp ESC, Solartex fabric and Rustolum paint. I have a little tweeking to do on the trim, it wants to climb pretty hard. I added guy wires for a little extra scale detail
Last edited by green river rc; 08-17-2014 at 05:55 PM.
08-17-2014, 07:07 PM
#1195
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beautiful job looks great. yep electric will supply more even torque then any gas engine and you will notice it more, do just what KaP2011 said 2 or 3 degrees down thrust, how does it take off ?? hard left? put some right thrust , also check incidence.
08-18-2014, 03:54 AM
#1198
I agree with 2.4ghs, you will love this plane. I think SIG calls this kit a "craftsman kit" or what the older builders call a "builders kit" meaning it's not a laser cut kit that just falls together, it requires the builder to put some effort in but you will get a beautiful airframe that you won't want to cover. Just take your time, double check every measurement and follow the directions, you'll do fine. There's a ton of info in this thread and we're here to answer any questions that come up.
08-24-2014, 05:58 PM
#1199
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Thanks for the pic of the tailwheel. It came in very handy.
While #1 son was learning to take off my slightly squirrely old Smith (the one with crooked everything) he ground looped it and the original tailwheel bracket broke. Your pic reminded me I had one like yours in the parts box. Now she's ready to go again, hopefully less squirrely now.
Also she's the test bed for HobbyKing's $9 led light set.
I poked a hole thru the bottom of the wing in the servo well and hot glued two landing lights and red/green anti collision lights to the bottom of the bottom wing.
The old geezer eyes have trouble on long final on cloudy days so we thought they may help.
As you can see,a #1 son is taking his time getting all of the joints perfect in his Smith.
Should be real comfortable flying it by the time he gets it finished.
Nick
While #1 son was learning to take off my slightly squirrely old Smith (the one with crooked everything) he ground looped it and the original tailwheel bracket broke. Your pic reminded me I had one like yours in the parts box. Now she's ready to go again, hopefully less squirrely now.
Also she's the test bed for HobbyKing's $9 led light set.
I poked a hole thru the bottom of the wing in the servo well and hot glued two landing lights and red/green anti collision lights to the bottom of the bottom wing.
The old geezer eyes have trouble on long final on cloudy days so we thought they may help.
As you can see,a #1 son is taking his time getting all of the joints perfect in his Smith.
Should be real comfortable flying it by the time he gets it finished.
Nick
Last edited by taildragger1589; 08-24-2014 at 06:00 PM.
09-01-2014, 06:17 PM
#1200
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For those of you planning on using a .91 four stroke on your smith....
We discovered that the Dubro 2" spinner won't have enough room for the 14/6 MAS prop. the sides of the hub hit the posts with the screw holes.
There are two choices:
you can get a TruTurn type spinner with a center screw into an adaptor nut.
or
you can use a 13/6 prop and grind a little off of the screw posts of the Dubro.
Here is a vid of the Magnum .91 flying with a 13/6.
Notice the take off is dead straight thanks to the new CAP2011 style tailwheel.
Nick
https://www.youtube.com/watch?v=d5YXjhIfqYc
We discovered that the Dubro 2" spinner won't have enough room for the 14/6 MAS prop. the sides of the hub hit the posts with the screw holes.
There are two choices:
you can get a TruTurn type spinner with a center screw into an adaptor nut.
or
you can use a 13/6 prop and grind a little off of the screw posts of the Dubro.
Here is a vid of the Magnum .91 flying with a 13/6.
Notice the take off is dead straight thanks to the new CAP2011 style tailwheel.
Nick
https://www.youtube.com/watch?v=d5YXjhIfqYc
