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Mar 07, 2012, 05:55 PM
Registered User
xatled99's Avatar
Build Log

yet another scratchbuilt twin boom pusher


For my second fpv plane, I've decided to go down the well-worn path of the twin boom pusher.

Parts list:

RQ7 / twin boom pusher links:
Design and stability references:
Lessons/future ideas:
  • Square CF tubing (slow stick fuselages) might have been easier to work with
  • A Multiplex Mentor wing would have been a better choice. A built-up wing would be even better.
  • I could have wrapped the CF/FG interfaces with thread and then soaked the thread in CA for additional strength.
  • Use 2.5" pvc downspout for the fuselage
Last edited by xatled99; May 05, 2012 at 02:29 PM.
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Mar 07, 2012, 06:26 PM
Falling with style
metalfred's Avatar
Subscribed! btw I have bought this exact same fake camera turret for my shadow. It looks good!
Mar 07, 2012, 08:45 PM
my karma ranover my dogma
galaxiex's Avatar
Cool!

The "twin boom pusher" seems to be a very versatile/adaptable design.
The more I mess with it... the more I like it.

Here's mine from awhile back... much smaller scale but that just shows how versatile the concept is.

https://www.rcgroups.com/forums/show...postcount=2547
Mar 08, 2012, 08:58 AM
Engineer for Christ
IBCrazy's Avatar
I love twon boom pushers!

Just 2 of my 6 dual boom pusher builds:

https://www.rcgroups.com/forums/show....php?t=1366238 - Minion airplane

https://www.rcgroups.com/forums/show....php?t=1348642 - Wraith airplane

They both fly great. Note the forward swept wings. This adds incredible stability.

-Alex
Mar 08, 2012, 09:39 AM
Registered User
Toysrme's Avatar
shoot, you could probably find a .40 sized trainer wing for free. have more dihedral, more lift & prob 50-100sqin more wing to carry more batts.
Mar 08, 2012, 10:43 AM
Registered User
xatled99's Avatar
Unsurprisingly, the fake camera dome does not have the greatest optics.
Last edited by xatled99; Mar 16, 2012 at 03:00 PM.
Mar 08, 2012, 11:16 AM
Registered User
rob38's Avatar
http://www.helmut-gerken.de/sunriser/riser1.htm

this plane is not for sale anymore

i think this plane is great for fpv

rob
Mar 08, 2012, 12:25 PM
USA: LakeGeorge, New York
I asked for some input on the 'builders section' 4 days ago- just for helpful brainstorming


Click LINK for Images.
https://www.rcgroups.com/forums/show....php?t=1607630

not mine, but I love the concept.
Mar 08, 2012, 02:31 PM
The lunatic is on the grass
ridgewalker's Avatar
Nice planes!
I've been looking at my Super Cub and thinking about chopping off the fuse right behind the TE and adding booms for a pusher set up maybe add in a front section fuselage that would screw to the firewall as the stock cowl does.
Have to do some more thinking...


Ridgewalker
Mar 08, 2012, 03:37 PM
Do a Barrel Roll!
rcbif's Avatar
Quote:
Originally Posted by ridgewalker
Nice planes!
I've been looking at my Super Cub and thinking about chopping off the fuse right behind the TE and adding booms for a pusher set up maybe add in a front section fuselage that would screw to the firewall as the stock cowl does.
Have to do some more thinking...


Ridgewalker
I've though of that. Hardest part would be figuring out how to get that weight forward. You have a good idea there with that "nose extension". If a gopro was being used, that would really help balance it out too.

I'm starting my own twin-boom pusher soon too. I'm using an e-flite apprentice wing, 10x10mm sq carbon fiber booms, re-enforced foamboard for tail, and probably a custom fiberglass fuselage "pod".

Been busy with my tricopter though...
Mar 09, 2012, 06:10 PM
Registered User
xatled99's Avatar
The 24" square tube is 21oz.
Last edited by xatled99; Mar 16, 2012 at 02:56 PM.
Mar 09, 2012, 06:51 PM
USA: LakeGeorge, New York
xatled99,

good start soo far.... I'm going to try and make this one

I want to use A-tail, but with Elevator ONLY? is that do able?

Last edited by rclab1; Jul 07, 2012 at 05:35 AM.
Mar 10, 2012, 07:36 AM
Registered User
xatled99's Avatar
Motor's on the way. 4s 4000 looks like it'll do the job.
Mar 10, 2012, 05:19 PM
Registered User
xatled99's Avatar
I picked up some 1/4" aluminum arrow shafts to use as tailbooms. I should be able to mount them to the wing with part # 8871T31 from mcmaster carr. AUW should be around 48oz.

edit: the clamps seem too small.

edit: slow stick fuselage booms might be worth trying.
Last edited by xatled99; Mar 16, 2012 at 02:58 PM.


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