Taildragger
Legendary member
Not a bad bush plane tbh
FT Slow Stick S250
- Thread starter makoman1860
- Start date
skymaster
Elite member
love the background
Yes.
Taildragger
Legendary member
You do have to join but you can be a free member
Hi Everyone,
I have most of my parts printed out but having a problem with the servo holder. One of loops on the end of the servo holder wants to break in have. Has this happened to you ? I see Hoomi has a different idea to hold his servos. I don't know how to beef up the loops on the servo holder. I also don't know how to use TinkerCad.
I have most of my parts printed out but having a problem with the servo holder. One of loops on the end of the servo holder wants to break in have. Has this happened to you ? I see Hoomi has a different idea to hold his servos. I don't know how to beef up the loops on the servo holder. I also don't know how to use TinkerCad.
Taildragger
Legendary member
Hello, I compared and scaled the placement of the parts,
also the camber, from the vid. I glued the wing to the mounts.
the maiden flight was very tail heavy, and have since added 1 oz.
to the nose. Should fly better.
Hoomi
Master member
On mine, the PLA would snap when I tried to remove the supports from the print process. I finally decided if I couldn't manage to even get it cleaned up to install onto the plane, I was probably best not trusting it to hold up in flight. The servos are held into place in typical FT fashion, using hot glue. If I were making another and repeated this modification, I think I would make the servo box a bit longer, so I could move the tail surface servos farther back on the plane, and shorten the push rods for them. As it is, I used two of the wire guides to help make sure I wouldn't have problems with the rods flexing instead of activating the surfaces.
I also had a problem on the original printing of the parts, that the hole for the arrow shaft was just slightly too small for the arrow that I bought. I was trying to balance between small diameter on the arrow shaft, and overall length. The smaller diameter arrows were also several inches shorter. What I finally ended up doing was making a guess, and using the program that came with my 3D printer to resize the part. I used the wire guide, as it's the smallest part, and therefore, the least amount of time and PLA to do an experimental print. For my arrow shaft, I started with 105%. That was large enough to fit the arrow, though still a bit snug, so I printed the rest of the parts at 106%, and that worked fine. Even for the motor mount, the upsizing allowed it to slide over the arrow, but the hole spacing for the motor screws was still close enough to not give any problem in mounting the motor.
For the motor mount and tail mount, I used medium cure epoxy, which gave me about 10 minutes for getting the alignment where I wanted it. The wing mounts I got into the position for the best CG, and the best level alignment with the tail surfaces, and then used CA to secure those. The foamboard for my servo box is hot glued into shape, and then glued to the front wing mount. For the back of the servo box, I used the discarded front wing mount that had a bit too small a hole to slide over the arrow shaft. I reamed out the hole enough to allow it to fit, but didn't want to do that for a part that was as critical as the actual wing mount. The wing is epoxied to both the front and rear wing mounts, as I wasn't worried about having it removable, especially with the aileron connecting rods. The rubber bands add a little extra security to the wing mounting, but I suspect I could probably fly it without the rubber bands.
My other mod was adding the bamboo skewer supports between the horizontal and vertical stabilizers. It probably doesn't really need them, but I figured it wouldn't hurt anything. I wasn't as worried about overall weight at the FT crew was while designing it, since I pretty much only fly at our club field, so the FAA weight restrictions aren't as much of a concern.
jcombs73766
New member
For those of us who only have 9gram servos on hand, I remade the servo holder it can be found Here( https://cad.onshape.com/documents/f...renderMode=0&uiState=64512f0aa81303542d3ff232 )
Is it possible to print this if it is view only?
jcombs73766
New member
fixed!
RickyG
Member
I so wanted to maiden mine this evening, but it is just too windy...
I got some Dubro 3inch wheels and printed my own hubs, they are 2 grams lighter, so not a big weight savings, but I was able to design it so that the axle hole fit the metal rods I used. I also redesigned the front wing mount as I seem to fiddle with the rubber bands too much. I took a Sig #67 and cut it in half to make two thinner bands and used those. I lengthened the catches for the rubber bands so that they have to be stretched to fit in there. That way they stay in place while I try and attach them to the rear (I also lengthened those as well)
The tail skid using a zip tie is genius! I did that as well.
Ricky
I got some Dubro 3inch wheels and printed my own hubs, they are 2 grams lighter, so not a big weight savings, but I was able to design it so that the axle hole fit the metal rods I used. I also redesigned the front wing mount as I seem to fiddle with the rubber bands too much. I took a Sig #67 and cut it in half to make two thinner bands and used those. I lengthened the catches for the rubber bands so that they have to be stretched to fit in there. That way they stay in place while I try and attach them to the rear (I also lengthened those as well)
The tail skid using a zip tie is genius! I did that as well.
Ricky
tomlogan1
Elite member
Excellent very nice landing.
CappyAmeric
Elite member
I used an original FT A motor so I only tried 2s, so it was VERY slow. I would love to try it with a 2206 quad motor and may do that later. Only one pack because the PLA on the motor pod expands just enough with motor heat to allow the hex screws holding the motor to pull through and letting the motor detach. Fortunately, I heard it happen and went to idle to avoid twisting the motor wires and damaging anything. I think a little E6000 in the screw holes on the motor mount may help in the future.
CappyAmeric
Elite member
RickyG
Member
Floaty and slow!
What is the length of your arrow?
My arrow is 32" flying conservatively, I could probably easily get 6 or 7 minutes out of that 2S 850mAh pack. I baby my batteries and land at 50%. After 4 minutes, I still had 3.9v on each cell.
I also designed this little wheel collar I printed in TPU. It's 5mmx5mm with a 1mm hole. I made a cone at the top with 2mm hole so I could get the wire started.
Ricky
