Houndpup Rc
Legendary member
Yep, I have to get it done soon though!
FTFC’25 MS Design SR - 71 Blackbird by Houndpup Rc
- Thread starter Houndpup Rc
- Start date
Flying Cherokee
Elite member
Been a while, but I happened to see your SR71 Houndpup, man you did good! Nice job!
L Edge
Legendary member
Did you do any video?
I would do a calculation of CG to see if it is correct. If it is, the problem is it doesn't take long with the long nose to go into high alpha and then into stall. Might be the elevator deflections might be too much. It rolls and pitches up quickly.
Why does HH use the gyro?, watch the video were the plane wobbles, it is approaching stall and the elevator is working hard to prevent nose up. and rollover. That's why no rudder, they use differential to prevent many crashes.
Read in SR-71 pilot stories that when the SR refuels, slow speed as they add fuel, pilot adds left engine afterburner (low, they also have high which I didn't know) and with that, the tanker has to make a very large left turn to finish topping off. It is flying in stall mode.
Did you have differential thrust? If you have only yank and bank, roll over you go, once the nose catches the positive air.
By the way, how do you know a stall is approaching?
Houndpup Rc
Legendary member
Thanks! Did you ever get to try your design?
Houndpup Rc
Legendary member
Yeah I am trying to make it fly gyro free.
Houndpup Rc
Legendary member
I was videoing...I thought......Yes I had differential thrust.....How I know that it stall is I pull up just a little bit and the nose whips up until the plane is vertical, and then because I have Edf's it stall and comes down!
Flying Cherokee
Elite member
Not yet, I need to fix it and then remaiden it. I've just been busy with other stuff lately.
Houndpup Rc
Legendary member
Yeah, so has my brother....Not yet, I need to fix it and then remaiden it. I've just been busy with other stuff lately.
Houndpup Rc
Legendary member
I am too, but I just work really late to get my stuff done! 🤣
Houndpup Rc
Legendary member
So I got one motor in the Blackbird last night and boy, that has a LOT more punch then those EDF's!
Houndpup Rc
Legendary member
I am hoping to get time to get the rest of the nose glued/taped on and the other motor put on tonight so i can take it out tomorrow.....I would have done it last night but the incident with the radjet sorta took a LOT of my time, and then there was work ect....
Mr Man
Mr SPEED!
Cool, no worries on the searching for parts stuff, I’ve had my fair share…
Mr Man
Mr SPEED!
Sweet!
Houndpup Rc
Legendary member
Yeah, lol But did you have to sneak on to the neighbors land at 11pm?! LOL
I think she was on her back porch when it CRASHED! 🤣
Houndpup Rc
Legendary member
Welll.....She's ready..... 🤣 🤣 🤣
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Mr Man
Mr SPEED!
Yes….. Just not at night.
Houndpup Rc
Legendary member
Mr Man
Mr SPEED!
Was actually retrieving an Eflite apprentice stol 750mm, Which I no longer have, because I gave it away to a friend.🤣
