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        Build Log yet another scratchbuilt twin boom pusher

#1 xatled99 Mar 07, 2012 05:55 PM

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

#2 metalfred Mar 07, 2012 06:26 PM

Subscribed! btw I have bought this exact same fake camera turret for my shadow. It looks good!

#3 galaxiex Mar 07, 2012 08:45 PM

Cool! :cool:

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

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

http://www.rcgroups.com/forums/showp...postcount=2547

#4 IBCrazy Mar 08, 2012 08:58 AM

I love twon boom pushers!

Just 2 of my 6 dual boom pusher builds:

http://www.rcgroups.com/forums/showthread.php?t=1366238 - Minion airplane

http://www.rcgroups.com/forums/showthread.php?t=1348642 - Wraith airplane

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

-Alex

#5 Toysrme Mar 08, 2012 09:39 AM

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.

#6 xatled99 Mar 08, 2012 10:43 AM

Unsurprisingly, the fake camera dome does not have the greatest optics.

#7 rob38 Mar 08, 2012 11:16 AM

http://www.helmut-gerken.de/sunriser/riser1.htm

this plane is not for sale anymore

i think this plane is great for fpv

rob

#8 rclab1 Mar 08, 2012 12:25 PM

I asked for some input on the 'builders section' 4 days ago- just for helpful brainstorming:)


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

not mine, but I love the concept.:D

#9 RaptorAP Mar 08, 2012 02:09 PM

http://www.rcgroups.com/forums/showt...ght=grey+ghost

http://www.rcgroups.com/forums/showt...ght=grey+ghost

My twin boom design over the years..

#10 ridgewalker Mar 08, 2012 02:31 PM

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

#11 rcbif Mar 08, 2012 03:37 PM

Quote:

Originally Posted by ridgewalker (Post 20976952)
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...

#12 xatled99 Mar 09, 2012 06:10 PM

The 24" square tube is 21oz.

#13 rclab1 Mar 09, 2012 06:51 PM

xatled99,

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

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

:popcorn:

#14 xatled99 Mar 10, 2012 07:36 AM

Motor's on the way. 4s 4000 looks like it'll do the job.

#15 xatled99 Mar 10, 2012 05:19 PM

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.


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