CARF-Models Mig 17 build thread
09-18-2022, 10:16 AM
#176
Thread Starter
Two Migs flown today at the U.K. home of model jets Abingdon. Now identical in set up with RB owner swapping to Core before the test flight, I set the model up exactly as mine and both flew without a single peep of trim. The JetCat P-220 Rxi set ups give 9+ minutes and perfect scale power. Landing roll in the 12mph wind we had today was 45’ or less!
Anyone without assistance the model needs little to no expo and as much movement you can get.
Our gear is both running small low C 2s Li-Po batteries and we need to slow up and stol climbing to reliably get the gear away. I’ll try a 3s Li-Fe next time.
Awesome models though.
Anyone without assistance the model needs little to no expo and as much movement you can get.
Our gear is both running small low C 2s Li-Po batteries and we need to slow up and stol climbing to reliably get the gear away. I’ll try a 3s Li-Fe next time.
Awesome models though.
The following 4 users liked this post by Dave Wilshere:
Canadian Man (09-26-2022),
David J Ruskin (09-19-2022),
jcterrettaz (09-24-2022),
Skunkwrks (10-17-2022)
09-18-2022, 11:35 PM
#178
Thread Starter
David
I will put together some notes, but the easy thing is you want as much control movement you can get. These are both at the natural mechanical maximum for Aileron and elevator and are very smooth and soft. It’s an incredibly smooth flying aeroplane. Anyone who has flown the larger models (1/4 scale plus) will know they are never twitchy.
Balance was done on both of these with fuel in the main tank 1” below the fuel line fitting (almost half a tank) as again the fuel in just in front of the balance point and I wanted an average. It’s 28cm from the wing trailing edge with this fuel. I trapped a cord in the joint and lifted, no electronic variable figures! The RB Mig was originally balanced a different way and the builder had glued weight into the tail cone! Luckily I queried it and he redid it with string and ended up having to add lots of nose weight!
The aeroplane flies so light it could be 30kg wet and still would not care!
CARF build a super straight aeroplane, neither needed one peep of trim on any surface!
Dave
I will put together some notes, but the easy thing is you want as much control movement you can get. These are both at the natural mechanical maximum for Aileron and elevator and are very smooth and soft. It’s an incredibly smooth flying aeroplane. Anyone who has flown the larger models (1/4 scale plus) will know they are never twitchy.
Balance was done on both of these with fuel in the main tank 1” below the fuel line fitting (almost half a tank) as again the fuel in just in front of the balance point and I wanted an average. It’s 28cm from the wing trailing edge with this fuel. I trapped a cord in the joint and lifted, no electronic variable figures! The RB Mig was originally balanced a different way and the builder had glued weight into the tail cone! Luckily I queried it and he redid it with string and ended up having to add lots of nose weight!
The aeroplane flies so light it could be 30kg wet and still would not care!
CARF build a super straight aeroplane, neither needed one peep of trim on any surface!
Dave
The following 2 users liked this post by Dave Wilshere:
David J Ruskin (09-19-2022),
Skunkwrks (10-17-2022)
09-19-2022, 04:08 AM
#180
Thread Starter
Danny
Presuming you are building as with all the detail I think it comes down to wire you use on the Afterburner set up, heavier wire pulls it back a little. It can definitely be built without weight, you can see my set up, if I had used the 5000 PB Rx packs I could remove the small amount of weight I have in the nose. It’s an aeroplane with a small tail, so it can fly like it’s nose heavy, but it’s just the lack of ‘stabiliser’ balanced front of the rear wing tube is 27cm and I would not go further back than that, when you stall it it needs flying out at this position. 28cm with half a main tank is the sweet spot.
Dave
Presuming you are building as with all the detail I think it comes down to wire you use on the Afterburner set up, heavier wire pulls it back a little. It can definitely be built without weight, you can see my set up, if I had used the 5000 PB Rx packs I could remove the small amount of weight I have in the nose. It’s an aeroplane with a small tail, so it can fly like it’s nose heavy, but it’s just the lack of ‘stabiliser’ balanced front of the rear wing tube is 27cm and I would not go further back than that, when you stall it it needs flying out at this position. 28cm with half a main tank is the sweet spot.
Dave
09-19-2022, 04:12 AM
#181
Thread Starter
This was my final solution to my ‘short’ van. The plate on the bulkhead has 4x carbon pegs and the bracket folds down when the Mig isn’t been transported. The Velcro strap is just for support when I remove the bracket to take the fuse out.
The following users liked this post:
Ron S (09-26-2022)
The following 2 users liked this post by JP-1:
jcterrettaz (09-24-2022),
Viper1GJ (09-24-2022)
09-26-2022, 12:03 PM
#190
FWIW, confirmed live and in person this weekend that the one I referenced is flying with a Dragon (133mm diameter per spec), and has the stock center tank. It's tight, but it's there.
The following users liked this post:
Bob_B (09-28-2022)
The following 3 users liked this post by Dave Wilshere:
The following users liked this post:
CostasV (11-18-2022)
The following 3 users liked this post by Canadian Man:
