telnar1236
Master member
I wish - maybe 20% of my designs never even end up working at all and another 20% I abandon before I resolve all the issues
FTFC26: Build-ruary by Telnar1236
- Thread starter telnar1236
- Start date
telnar1236
Master member
A lot of progress yesterday and today. I got almost all the remaining electronics installed in the Ghost. My scale is acting up a bit but the weight is somewhere between 2300 g and 2900 g. The sum of the projected part weights is 2758 g so I think it's probably about that. I needed to add 150g of nose weight to get it to balance even with all the changes, so I'm very glad it has the swept wings.
The retract units were a bit different than those I designed for (I pulled them out of a Freewing F9F I found in the trashcan at my club field) and the nose unit was a bit damaged, so I needed to jury rig a steering arm since the 3D printed arm didn't quite fit.
I also have the nose of the 4s F-106 assembled now. Nothing too crazy and the design is identical to the 3s version where I already fixed the printing issues, so they print quickly and flawlessly.
And finally, I printed the nose gear for my MiG 15. Again, a pretty simple design. It's pretty short for a normal nose gear strut but it has about enough room to do everything it needs to.
The retract units were a bit different than those I designed for (I pulled them out of a Freewing F9F I found in the trashcan at my club field) and the nose unit was a bit damaged, so I needed to jury rig a steering arm since the 3D printed arm didn't quite fit.
I also have the nose of the 4s F-106 assembled now. Nothing too crazy and the design is identical to the 3s version where I already fixed the printing issues, so they print quickly and flawlessly.
And finally, I printed the nose gear for my MiG 15. Again, a pretty simple design. It's pretty short for a normal nose gear strut but it has about enough room to do everything it needs to.
Piotrsko
Legendary member
@telnar1236 you're definitely in the wrong profession if not associated with the making of special effects
telnar1236
Master member
Thanks, been a crazy few weeks and might a crazy few more but I will eventually get these things in the air
telnar1236
Master member
Only a month after the end of the competition, but I finally was able to progress the build of my MiG 15 a bit.
And I also finally did the maiden flight of the Ghost, though no video yet. Overall, it's superb and performs better than I expected, but there are some minor fixes and repairs to make
And I also finally did the maiden flight of the Ghost, though no video yet. Overall, it's superb and performs better than I expected, but there are some minor fixes and repairs to make
telnar1236
Master member
Got the MiG 15 pretty much done. As always, it's a bit heavier than I'd like, but it balances perfectly and should still have plenty of power.
Wind was gusting up to 30 mph this weekend, so no video of the Ghost yet unfortunately
Wind was gusting up to 30 mph this weekend, so no video of the Ghost yet unfortunately
Houndpup Rc
Legendary member
Looks good!👍
telnar1236
Master member
A few months too late but I flew the MiG 15 and got some video which I'll upload when I get the chance. Overall, it flies well, but I think it needs a cheater inlet to get a bit more air to the fan since it feels a bit underpowered.
telnar1236
Master member
MiG 15 flight video:
Overall, it flies great and is super easy to fly for an EDF and probably easier to fly than most warbirds. It's very difficult to stall and mostly just experiences wing rock when you do partially stall it. There is no pitch up tendency, and it slows down very easily. It can do basic aerobatics like loops and rolls but it's not able to do anything too aggressive since it's set up to respond to inputs quite gently. You can sort of snap roll it, but it's not a pretty maneuver. Roll rate is a bit slow on the setup I'm going to end up recommending, but I did move the linkages to inner holes on the control horns and for one flight and that does help it roll a good deal faster but makes it a bit more twitchy which I didn't like.
The biggest issue is it felt underpowered, which I don't think really shows up too clearly in the video interestingly. It was also weird in that it felt like about 50% of the power was in the last maybe 20% of the throttle, so I was cruising at a quite high throttle setting, but then still had enough power to climb well if I increased the power just a bit. I'm guessing it's some weird effect in the inlet ducting so I'm going to add a cheater inlet and hope that fixes it. Part of it may have also come from me going from the Ghost which is a bit of a rocket to this which firmly is not.
Overall, it flies great and is super easy to fly for an EDF and probably easier to fly than most warbirds. It's very difficult to stall and mostly just experiences wing rock when you do partially stall it. There is no pitch up tendency, and it slows down very easily. It can do basic aerobatics like loops and rolls but it's not able to do anything too aggressive since it's set up to respond to inputs quite gently. You can sort of snap roll it, but it's not a pretty maneuver. Roll rate is a bit slow on the setup I'm going to end up recommending, but I did move the linkages to inner holes on the control horns and for one flight and that does help it roll a good deal faster but makes it a bit more twitchy which I didn't like.
The biggest issue is it felt underpowered, which I don't think really shows up too clearly in the video interestingly. It was also weird in that it felt like about 50% of the power was in the last maybe 20% of the throttle, so I was cruising at a quite high throttle setting, but then still had enough power to climb well if I increased the power just a bit. I'm guessing it's some weird effect in the inlet ducting so I'm going to add a cheater inlet and hope that fixes it. Part of it may have also come from me going from the Ghost which is a bit of a rocket to this which firmly is not.
