I read your previous comment about how the TK-1 gear didnt work out well for your S-21 and that you should build a cub if you want to do back country flying. Can you expound on this? I was looking to build an S-21 in a year or so, but im worried its not the back country plane that i think it is...
A cub will land shorter and is more robust but slower. The S-21 with factory gear is capable to land on 500’ with a clear approach. I’ve landed on baseball sized gravel bars with a backcountry instructor so my opinion has shifted a bit. If you want shock gear (gunna make the S-21 slower) you need to consult RANS and be careful with the tailcone as it is thin aluminum structure. The S-21 is a good compromise for cross county flying with some off field capability.
thanks for the response, i was pretty dead set on the S-21 because of its back country capability, but ive heard from several other owners now that it is simply not the mission it was engineered for. Would you say the traditional tube and fabric planes are the ideal backcountry design?@@SkyRayden100
Tube and fabric will always land shorter and be a bit more robust, but any airplane abused too much will break. Don’t throw out the S-21 too fast, I like the speed of mine and can live with not landing in 100’. First define your mission and what you mean by backcountry. The S-21 is an awesome airplane and relatively easy build.
The 78” is best matched for the S-21. I only had the 78” a few days, but Catto’s cruise pitch is comparable to the WW with a slightly better climb. If you pitch them both down for climb, the Catto makes it a rocket ship. The WW at a flatter pitch is inferior. I’m hoping to get more time on the 78” at some point for more data.
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
good lookin prop !
Nice! Thanks for sharing, those shims make a lot of sense.
I read your previous comment about how the TK-1 gear didnt work out well for your S-21 and that you should build a cub if you want to do back country flying. Can you expound on this? I was looking to build an S-21 in a year or so, but im worried its not the back country plane that i think it is...
A cub will land shorter and is more robust but slower. The S-21 with factory gear is capable to land on 500’ with a clear approach. I’ve landed on baseball sized gravel bars with a backcountry instructor so my opinion has shifted a bit. If you want shock gear (gunna make the S-21 slower) you need to consult RANS and be careful with the tailcone as it is thin aluminum structure. The S-21 is a good compromise for cross county flying with some off field capability.
thanks for the response, i was pretty dead set on the S-21 because of its back country capability, but ive heard from several other owners now that it is simply not the mission it was engineered for. Would you say the traditional tube and fabric planes are the ideal backcountry design?@@SkyRayden100
Tube and fabric will always land shorter and be a bit more robust, but any airplane abused too much will break. Don’t throw out the S-21 too fast, I like the speed of mine and can live with not landing in 100’. First define your mission and what you mean by backcountry. The S-21 is an awesome airplane and relatively easy build.
Woww looks amazing! You already do a fligth test?
What sort of climb/cruise performance changes have you seen with the change from WW to a CATTO prop?
Cheers Greg
The 78” is best matched for the S-21. I only had the 78” a few days, but Catto’s cruise pitch is comparable to the WW with a slightly better climb. If you pitch them both down for climb, the Catto makes it a rocket ship. The WW at a flatter pitch is inferior. I’m hoping to get more time on the 78” at some point for more data.