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This thread is privately moderated by leadfeather, who may elect to delete unwanted replies.
Feb 24, 2011, 05:04 PM
When pigs fly rc
rcrich's Avatar
Great Idea ! any vibration issues ? Rich
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Feb 24, 2011, 05:21 PM
Winging it >
leadfeather's Avatar
Quote:
Originally Posted by jonesj26
Here's a (partial) video of the maiden flight. Ran out of camera battery.

http://www.youtube.com/watch?v=ooKgS4Y7Iqw

Overall it flew very well. Needed to shift the battery back a tiny bit for better CoG. Gonna be a fun one!
Nice! I think your A-10 needs a thread and some plans.
Feb 24, 2011, 05:25 PM
Registered User
Quote:
Originally Posted by rcrich
Great Idea ! any vibration issues ? Rich
Not now. The first few versions had some problems with the CF rod bowing outward at lower RPMs, which shook things up pretty good and contributed to shaft/motor separation. Once you hit a certain rpm though, the CF rod centered itself and smoothed out. Keeping the shaft under about 9 inches and/or having a piece of EPP foam placed halfway between the motor and the foam at the back of the aircraft seems to eliminate this problem and lets it run smooth. I haven't noticed additional motor heat or wear and tear, but then I've only been doing this for about a month.
Feb 24, 2011, 05:37 PM
Registered User
Quote:
Originally Posted by leadfeather
Nice! I think your A-10 needs a thread and some plans.
Thanks leadfeather! I'd be happy to do that. I'll begin putting together a more complete/useful set of plan documents and then will start a thread.

Cheers,
Jack
Feb 25, 2011, 07:24 PM
Registered User
Update regarding coupling a carbon fiber shaft extension to a mid-mounted motor. I've found that both the fuel line coupling and (to a lesser extent) the tape coupling are more prone to separate if you have longer (or hotter) flight times. I found a 1/8 inch rigid shaft coupler online that appears to not have this problem. A picture of the coupler is shown below. I got these at http://www.servocity.com/html/rigid_shaft_couplers.html

It may, of course, introduce its own set of challenges...

Hope this helps.
Last edited by jonesj26; Feb 25, 2011 at 07:37 PM.
Feb 25, 2011, 07:54 PM
When pigs fly rc
rcrich's Avatar
Challenges is what keeps us inventing.... Great idea hope it works out
rich
Feb 26, 2011, 09:47 PM
Registered User
Has anybody tried the clear Krylon Short Cuts to coat their bird? If not Krylon, what might be another option to provide a (light weight) clear coat?

Thanks,
Jack
Mar 06, 2011, 07:09 AM
Not always grumpy!!
insomaniac45's Avatar
hey guys, i thought i might post my question here, as it is for tip

i am building a pusher uav type scratch built. i am still desigining it atm. what do i need to do that is different from a normal configuration.

like motor alignment

and incidence?
my previous build, well lets just say it looked good, but it didnt exactly take off. (i prob built it too small for my equipment as i had massive p-torque roll which was uncorrectable)

the motor was pointing up. (what about sidewys direction? and i had a few degrees of incidence, (approx 5deg, do i need more? )

cheers guys. any help would be really greatful.

also, when mounting the wings, whats a good idea, (as the wings are going to be approx middle of the fuse, is it a good idea to abuild the wings into the fuse, or can they be glued onto the sides what do you recommend?)
Last edited by insomaniac45; Mar 06, 2011 at 07:11 AM. Reason: added more info
Mar 06, 2011, 09:45 AM
Winging it >
leadfeather's Avatar
Quote:
Originally Posted by insomaniac45
hey guys, i thought i might post my question here, as it is for tip

i am building a pusher uav type scratch built. i am still desigining it atm. what do i need to do that is different from a normal configuration.

like motor alignment

and incidence?
my previous build, well lets just say it looked good, but it didnt exactly take off. (i prob built it too small for my equipment as i had massive p-torque roll which was uncorrectable)

the motor was pointing up. (what about sidewys direction? and i had a few degrees of incidence, (approx 5deg, do i need more? )

cheers guys. any help would be really greatful.

also, when mounting the wings, whats a good idea, (as the wings are going to be approx middle of the fuse, is it a good idea to abuild the wings into the fuse, or can they be glued onto the sides what do you recommend?)
sleepless,

I think you'll get more help if you can start a new thread and post some pictures of what you built and especially sketches of what you'd like to build.

The answers to some of your some of the questions you asked will depend on the overall design.
Mar 06, 2011, 10:20 AM
Not always grumpy!!
insomaniac45's Avatar
cheers lead feather.
will do.
Mar 20, 2011, 06:52 PM
Registered User

WINGSTAYS will hold batteries, wings, ESC to foamies


Just go to www.wingstays.com and you will enjoy what they can do for your foamies!
Mar 21, 2011, 07:24 PM
In the 20' glider range
anti-gravity's Avatar
Cross posting and spamming isn't welcome here...
Mar 21, 2011, 08:00 PM
Registered User

Marking on black epp


What do you use to mark cut lines on balck epp foam...I've tried a white fabric pencil and it doesn't work....

Found nothing at Officemax either....

thanks
Mar 21, 2011, 09:07 PM
Winging it >
leadfeather's Avatar
Quote:
Originally Posted by Atx_Heli
What do you use to mark cut lines on balck epp foam...I've tried a white fabric pencil and it doesn't work....

Found nothing at Officemax either....

thanks
Sharpie "Metallic Silver" works great on black epp.
Mar 21, 2011, 10:36 PM
flyin' fool
goldguy's Avatar
Quote:
Originally Posted by Atx_Heli
What do you use to mark cut lines on balck epp foam...I've tried a white fabric pencil and it doesn't work....Found nothing at Officemax either....thanks
straight pins or silver marker


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