johnbecker31
Junior Member
johnbecker31 submitted a new resource:
Q325 - Q325 - Scaled down Quickie 500
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Q325 - Q325 - Scaled down Quickie 500
Read more about this resource...
Q325 3
- Thread starter johnbecker31
- Start date
tomlogan1
Elite member
Thanks for this. A couple of the guys at the field fly nitro Quickie 500s so it will be a hoot to show up with an electric Quickie. Your wing span should be about 32.5 inches +/- correct?
johnbecker31
Junior Member
The span on this is roughly 40" I am still trying to figure out the right motor to get this thing over the 100mph mark. let me know how it goes.
tomlogan1
Elite member
johnbecker31
Junior Member
The wing chord is 8"
So I just noticed that the CG mark is not accurate. if you are checking the CG with airplane inverted, the CG is actually right in the middle of the box spar. I will update the plans and post.
johnbecker31
Junior Member
johnbecker31
Junior Member
L Edge
Master member
Here is the original size Q-500. Back in the 70's, to compete, you had to explore ways to to come in under weight. So we cut foam wings and reduced the balsa to save weight. Investigated carbon wire strings(50 wires wide) that was epoxied to each 1/2 wing(expensive) to reduce twisting and warping. In general, came in about .25 lbs lighter which improved the speed. Especially if you have a jedi in the family.
By the way, good luck on your hunt for 100+. It will be the right motor/prop combo and reducing drag from your servos. For instance, your elevator servo, if installed internally and by leaving a gap in the end of the fuse, you can rotate the elevator. Look at the red tape(by the fiberglass) which shows how the wire goes into the aileron thru a tube and then bends up to connect to a servo which is on the wing.
Another way(if you know what you are doing), you can try to max out efficiency of motor/prop at the top end , is try timing the motor. Be careful.
By the way, good luck on your hunt for 100+. It will be the right motor/prop combo and reducing drag from your servos. For instance, your elevator servo, if installed internally and by leaving a gap in the end of the fuse, you can rotate the elevator. Look at the red tape(by the fiberglass) which shows how the wire goes into the aileron thru a tube and then bends up to connect to a servo which is on the wing.
Another way(if you know what you are doing), you can try to max out efficiency of motor/prop at the top end , is try timing the motor. Be careful.
tomlogan1
Elite member
3d parts printed. Got this cut out and waiting for more foam board & electronics.
Attachments
johnbecker31
Junior Member
So top section has some cut lines to cut out the hatch. I usually make the cuts before gluing the tail down. In fact I glue the magnet platform and front clip in place just to make sure everything lines up before I glue the top down.
johnbecker31
Junior Member
I will put together a step by step guide with pictures At some point.
tomlogan1
Elite member
Great, then I can see what I did wrong.😁
L Edge
Master member
To give you some added background info about speeds of 100+ using motors/prop, suggest you look at this site.
Scimitar: Chasing 100mph
The goal for this project is to go fast: 100 mph. The airframe and decal scheme are inspired by formula one air racing designs, particularly the Seguin Wasabi Special, shown below. It managed 70mph on 3s and 80mph on 4s using Power Pack C and a 9x9, 107mph on 4s with a Cobra 2820/8 1450kv...
forum.flitetest.com
johnbecker31
Junior Member
johnbecker31
Junior Member
Looking forward to seeing your build and hearing how it does! I am always a little nervous with a maiden. even with a well tested and proven design.
tomlogan1
Elite member
Everything is cut out and covered; ESC & servos on hand. Just waiting for the motor. I ordered a R2205 2300KV but wonder if it is too small? Might a lower KV bigger prop be better?
