Cool!!! I really like my T-45... Glad you are back in the air with her !! :Cool:
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Official Freewing 90mm T-45 Goshawk Thread
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Really like the T-45. Keeps you on your toes when she is all dirty... Better fly her like a heavy jet. I almost lost mine on the maiden. Ran out of runway (pavement) and jerked her up to miss the curb. No problems after that until the battery (not Admiral or RT) hit LVC at 2:42!!! Pulled to idle and set up as best I could, then hit the throttle again and had just enough after reset to get her in without a bounce!!! :Whew::Scared: What a ride!!! Congrats to you on your maiden!!!!! :Cool: Glad it was not that eventful!
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I'm a little bumfuzzled at the CG on this plane . I'm measuring from the leading edge of the wing to a point that would be 4 inches back and be close to the recommended 63mm . Everyone says they are sliding the battery forward but I'm having to slide it back as far as I can and still adding weight to the tail . About an ounce on the tube on the plastic exhaust piece .( it's on the vent tube ) It is level with about a inch nose down ,inverted on a balance fixture . Any one else had to do this ? I'm using the Admiral 5000 battery .I'm 66 years old and been flying since a teenager and a retired Aircraft Tech , G-4 mechanic started out at the bottom at a county airport
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Hey there Darrellmims, welcome to Hobby Squawk!
I led the development team for the Freewing 90mm T-45. It's been a while since I flew mine and don't have it in front of me right now, but as I recall the recommended starting CG is easily obtained by gripping the aircraft with two opposing fingers positioned at the front lip of the plastic "bunny ears" on top of the fuselage aft of the canopy. With the model upright and with the landing gear down. I grip the model with my thumb and middle finger, and lift. That's my "quick and dirty" CG spotcheck. Eventually I ended up moving my CG back for personal preference, but the front of the bunny ears is a good start for you to maiden, then adjust from there. Some people like faster landing speeds and further forward CG. I prefer slower landing speeds and further aft CG, at the cost of keeping momentum up during slow turns.
Edit: I'll clarify that I used the older Admiral 6s 5000, and never added any ballast weight anywhere. I used standard epoxy to join the rear fuselage piece, without any additional reinforcement than what was provided in the stock setup.Live Q&A every Tuesday and Friday at 9pm EST on my Twitch Livestream
Live chat with me and other RC Nuts on my Discord
Camp my Instagram @Alpha.Makes
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Originally posted by Alpha.MotionRC View PostHey there Darrellmims, welcome to Hobby Squawk!
I led the development team for the Freewing 90mm T-45. It's been a while since I flew mine and don't have it in front of me right now, but as I recall the recommended starting CG is easily obtained by gripping the aircraft with two opposing fingers positioned at the front lip of the plastic "bunny ears" on top of the fuselage aft of the canopy. With the model upright and with the landing gear down. I grip the model with my thumb and middle finger, and lift. That's my "quick and dirty" CG spotcheck. Eventually I ended up moving my CG back for personal preference, but the front of the bunny ears is a good start for you to maiden, then adjust from there. Some people like faster landing speeds and further forward CG. I prefer slower landing speeds and further aft CG, at the cost of keeping momentum up during slow turns.
Edit: I'll clarify that I used the older Admiral 6s 5000, and never added any ballast weight anywhere. I used standard epoxy to join the rear fuselage piece, without any additional reinforcement than what was provided in the stock setup.
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Originally posted by Darrellmims View Post
Well that's a big difference of about 2 inches if its suppose to be 63mm aft of the front of the scoops . I'm sure it'll be good at the forward CG but seems like it would need a lot of nose up trim and a lot of elevator upon landing , I know fwd CG is better for first flights then readjust it for future flights as you feel the need. I just don't want to be tail heavy ,very touchy at aft CG.I will check further before the first flight though . Thanks
Here is a pic of my Gensace 5000 60C battery placement and the screw I use. Of course your CG placement will change to your flying style. Hope this helps.
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I didn't say "63mm aft of the front scoops", I said "located at the front lip of the plastic bunny ears [front scoops]". DCorsair's alternative method and pictures are good references for a similar CG range.Live Q&A every Tuesday and Friday at 9pm EST on my Twitch Livestream
Live chat with me and other RC Nuts on my Discord
Camp my Instagram @Alpha.Makes
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Originally posted by Alpha.MotionRC View PostI didn't say "63mm aft of the front scoops", I said "located at the front lip of the plastic bunny ears [front scoops]". DCorsair's alternative method and pictures are good references for a similar CG range.
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Originally posted by Darrellmims View Post
Just going by what the manual says , 63mm from the front of the scoops or right in the middle of the top strobe light. I also like for a low wing plane to be balanced inverted .Now setting the plane on a balance fixture( inverted) an putting the pads on the screws like Dcorsair said ,I have a plane that's is level with a slight nose down attitude .and it's in line with the top strobe . I think this will work . Thanks for your help .
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Well today was the day to get mine in the air for the first time and it didn't happen . I couldn't get enough speed to get the nose in the air ,it was not accelerating at all . I put a fish scale one the nose LG and all I could get is 5.8-6.1 Lbs pull .Manual says that it should be closer to 8. Yes I set the throttle on the ESC and tried another battery (60c) .There was a guy saying he did the same thing but I cant find what his was pulling . I fly off grass and it was cut low and a friends A-10 fly's perfectly fine . I will be calling Motion RC and if I don't get a good answer ,I'll trade this for a A-10 !!!
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Originally posted by DCORSAIR View Post
Your way will work to but when your out at the field without your balance stand and you want to move your CG around, my way makes it so easy to change the CG, just reach down and place your fingers tips on the screws and pick it up, you don't even have to pick it up off the ground, it will drop the tail or nose as soon as you put pressure on the screws.
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