Maidened my Synapse today. Out of 30 or so foamboard / foam airplanes I have built, this one has some of the best, if not the best flying characteristics of all my planes. It glides forever and has extreemly good control. Enough to skim the ground at full speed without very much skill. Your building techniques are the only way to go. Keep up the good work and keeping my younger generation interested in aviation.
awesome techniques Ed! I had a case when elevon would get pushed and the servo got ripped out with foam from the wing. Since then I tried gluing giftcards or craft sticks under the servo to spread some of the surface load and it worked great. Also I always drill tiny holes in gift cards for push rods using an x-acto knife. Push it slightly against plastic and turn it back and forth a few times and then do the same on the other side. Works with plastic and thin ply :)
Thanks my friend. I have to think there is some Readi-Board over there somewhere. There are a couple of Quebecois in the upcoming Snowbird contest entry video who use it. The Synapse does glide quite well, especially the light LOS version, without FPV gear. I can also put it in a high angle of attack and have it float down at a 45 degree glide slope and just flop on the ground.
Could be a variety of things, but I'd recommend going liberally forward with the CG, be sure you have reflex either built into the wing or generously trimmed with elevons, and try some downthrust 3-5 degrees, especially if your motor is mounted above the chordline.
I use "music wire" which is essentially piano strings, and gotten from the local hobby shop. I like .047" size, but there are many choices. It's very cheap, easy to work with.
Sounding more like a thrustline issue then. Try moving thrust axis closer to chordline and/or direct down a few degrees so the imaginary shaft axis intersects the upper surface of the wing at 50% chord or so. Post pictures?
HI, Happy easter, sir Thanks for all your helping videos. I did'nt find foam boards in my area (eastern townships, Quebec, Canada). So I finally use hot wire cut foam (after a few months of try and re-try). My project has a lot in common with Synapse look and measures. My question is : Does this sort of flying wing fly without motor, meaning do you know th ability of Synapse-like models to "glide" ? Once more, I highly apreciate your video contributions.
Thank you for the response, but they are unbearably pitching down, they wont fly and if it has gear, it wont get off the ground. All of the planes will glide fine, but adding throttle they slam into the ground, do i just need to add a LOT of up trim?
Ill try that! thanks. I wish I could post pictures but I trashed it and the motor on a new plane. it is similar to rctestflights microdrone v3. a twin boom.
I like the gift card servo covers. I think you could mount the servo to the gift card and tape that assembly to the wing, That would make it really easy to remove the servos.
Hey Ed, have you noticed a lot of slop with those EXI 9g digital servos? I picked up a few to try out and while they seem otherwise solid, there is quite a bit of play compared to some of the really cheap non-metal gear digital servos from HK (namely the white HKSCM9 servos). I also plan on using Dubro control horns, mostly because I have some lying around. There shouldn't be any issues with them vice using DIY gift card control horns, right?
So I need help. Anybody. Whenever I make pusher planes the plane violently pitches down and nose dives when I add throttle. What am I doing wrong? How can I fix it?
You're not doing anything wrong. Pusher planes DO tend to nose down when you add throttle; the greater the rate at which throttle is added, the more noticeable is the tendency to pitch down. This can be mitigated by the geometry of the airframe; check RCGroups.com for more information.
Ed, why would you choose to install the servo's in the upper surface of the wing as opposed to the lower? Wouldn't you want as clean an upper surface as you can get for lift / drag purposes? I just finished the build phase of the synapse and am about to install the servo's - want to make the best decision. If you have a chance to throw me a quick word I would really appreciate it. Maddogrk1 - eBay blank credit cards. Just bought a pack of 100 for a few bucks. Come in 100, 500, 1000 etc. They are all over my noob tube and axon now.
![Coheed and Cambria - Searching for Tomorrow [Official Video]](http://i.ytimg.com/vi/hDsYGLbmadg/mqdefault.jpg)
Maidened my Synapse today. Out of 30 or so foamboard / foam airplanes I have built, this one has some of the best, if not the best flying characteristics of all my planes. It glides forever and has extreemly good control. Enough to skim the ground at full speed without very much skill. Your building techniques are the only way to go. Keep up the good work and keeping my younger generation interested in aviation.
That's great news, thanks for checking in! I hope we have a fleet of 'em zooming around soon.
awesome techniques Ed!
I had a case when elevon would get pushed and the servo got ripped out with foam from the wing.
Since then I tried gluing giftcards or craft sticks under the servo to spread some of the surface load and it worked great.
Also I always drill tiny holes in gift cards for push rods using an x-acto knife. Push it slightly against plastic and turn it back and forth a few times and then do the same on the other side. Works with plastic and thin ply :)
Thanks my friend. I have to think there is some Readi-Board over there somewhere. There are a couple of Quebecois in the upcoming Snowbird contest entry video who use it. The Synapse does glide quite well, especially the light LOS version, without FPV gear. I can also put it in a high angle of attack and have it float down at a 45 degree glide slope and just flop on the ground.
Thanks Ed, very good coverage as usual Glad to have ya on here.........
Could be a variety of things, but I'd recommend going liberally forward with the CG, be sure you have reflex either built into the wing or generously trimmed with elevons, and try some downthrust 3-5 degrees, especially if your motor is mounted above the chordline.
I use "music wire" which is essentially piano strings, and gotten from the local hobby shop. I like .047" size, but there are many choices. It's very cheap, easy to work with.
Another great video thanks Ed
Sounding more like a thrustline issue then. Try moving thrust axis closer to chordline and/or direct down a few degrees so the imaginary shaft axis intersects the upper surface of the wing at 50% chord or so. Post pictures?
great tips you've got here..... lol, when I finally get into RC's I know how to do it now!!
HI, Happy easter, sir
Thanks for all your helping videos.
I did'nt find foam boards in my area (eastern townships, Quebec, Canada). So I finally use hot wire cut foam (after a few months of try and re-try).
My project has a lot in common with Synapse look and measures. My question is :
Does this sort of flying wing fly without motor, meaning do you know th ability of Synapse-like models to "glide" ?
Once more, I highly apreciate your video contributions.
Great video!! answered many questions i had..
Thank you for the response, but they are unbearably pitching down, they wont fly and if it has gear, it wont get off the ground. All of the planes will glide fine, but adding throttle they slam into the ground, do i just need to add a LOT of up trim?
Ill try that! thanks. I wish I could post pictures but I trashed it and the motor on a new plane. it is similar to rctestflights microdrone v3. a twin boom.
I like the gift card servo covers. I think you could mount the servo to the gift card and tape that assembly to the wing, That would make it really easy to remove the servos.
Thats awsome where coluld i find the foam
ReadiBoard from the Dollar Tree stores. See other videos on wing construction for more details, on this channel.
Hey Ed, have you noticed a lot of slop with those EXI 9g digital servos? I picked up a few to try out and while they seem otherwise solid, there is quite a bit of play compared to some of the really cheap non-metal gear digital servos from HK (namely the white HKSCM9 servos). I also plan on using Dubro control horns, mostly because I have some lying around. There shouldn't be any issues with them vice using DIY gift card control horns, right?
Besides carbon fiber what else are push rods made out of?
So I need help. Anybody. Whenever I make pusher planes the plane violently pitches down and nose dives when I add throttle. What am I doing wrong? How can I fix it?
You're not doing anything wrong. Pusher planes DO tend to nose down when you add throttle; the greater the rate at which throttle is added, the more noticeable is the tendency to pitch down. This can be mitigated by the geometry of the airframe; check RCGroups.com for more information.
Ed, why would you choose to install the servo's in the upper surface of the wing as opposed to the lower? Wouldn't you want as clean an upper surface as you can get for lift / drag purposes? I just finished the build phase of the synapse and am about to install the servo's - want to make the best decision. If you have a chance to throw me a quick word I would really appreciate it.
Maddogrk1 - eBay blank credit cards. Just bought a pack of 100 for a few bucks. Come in 100, 500, 1000 etc. They are all over my noob tube and axon now.
This is probably a dumb question, but where do you get blank gift cards that you use?
They can be ordered online or obtained by the small handful at certain restaurants and businesses, devoid of actual store credit.