**EPP Peregrine, FFF-Eagle, Dragons and other Bird Planes** - Page 72 - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Nov 13, 2009, 05:58 PM
Smoke me a Kipper
fritzdecat's Avatar
Looks good...Glad some one else it trying this

Are you putting any dihedral in the wing or just flaring the tips?

What motor are you gonna use?
Sign up now
to remove ads between posts
Nov 13, 2009, 10:38 PM
Addicted to flight since 1944
rbrown3rd's Avatar
Quote:
Originally Posted by Pigeonflyer
Hi there Eaglebuilders,
Did the same as fritzdecat, simply printing the A4 tiled version of thre 56" plan and blowing it up to about 80" using a photocopier (A4 to A3 paper size enlargement).
The wing has to be strengthened some way (I am laminating the leading edge with 3 layers of 1mm balsa sheet before sanding it to the desired section) plus the cross spar is of heavier dimensions plus the entire surface will be covered, after painting, with transparent self-adhesive packing tape.

Capt G, I like your paint scheme. Simple enough, yet quite realistic and shows from a distance!

AUW is anticipated to be around 900g or maybe somewhat less. Here are some photos of the build:
Split the middle layer span wise and add a spar there before gluing the whole thing up. In other words split the middle layer span wise, glue it to the bottom layer with enough gap for your spar, add the spar, then glue on the top layer of the wing. That should do it. I am not sure a leading edge spar only would be sufficient but it might be with the layered wing.

Your big eagle looks really nice.
Nov 15, 2009, 08:20 AM
Registered User
Pigeonflyer's Avatar
I have already done the gluing, so I can only hope my solution for the wing will give enough strength. Of course, the fuselage also has some reinforcements, especially where it joins the wing.

Quote:
Originally Posted by fritzdecat
Looks good...Glad some one else it trying this
Are you putting any dihedral in the wing or just flaring the tips?
What motor are you gonna use?
Just folding up the winglets, but no dihedral.
The motor is a high-KV BL outrunner equipped with a 55mm ducted fan, run from a 3S 2200 mAh LiPo through 60A ESC
Later today I will be testing the system for thrust sufficiency and signs of excessive warming before assembling the drive system.
Measured everything and now it seems that 1000-1100g will be the final all-up weight..
Last edited by Pigeonflyer; Nov 15, 2009 at 12:43 PM. Reason: spelling
Nov 15, 2009, 08:53 AM
Addicted to flight since 1944
rbrown3rd's Avatar
What is the material you are using Pigeonflyer? Depron? Thickness?
Nov 15, 2009, 07:19 PM
Dance the skies...
Tom Frank's Avatar
Quote:
Originally Posted by Pigeonflyer
I have already done the gluing, so I can only hope my solution for the wing will give enough strength. Of course, the fuselage also has some reinforcements, especially where it joins the wing.
...
Just folding up the winglets, but no dihedral.
Have you considered embedding some CF rod or flat stock in slots in the wing upper and bottom surfaces? It will add a LOT of stiffness to the wing. I did this (using CF tow) on my 56 in span FFF eagle.
Nov 16, 2009, 03:31 AM
Registered User
Pigeonflyer's Avatar
Quote:
Originally Posted by rbrown3rd
What is the material you are using Pigeonflyer? Depron? Thickness?
Actually, it is sold as underlay for floorboards, but the material is depron, of 5mm standard thickness.

Tom Frank:
Yes, I thought of that, thanks. At the moment it seems that the leading edge lamination and the cross-spar give sufficient stiffness to the anterior half of the wing. I am still wondering whether or not to work on the posterior section too, which is only 5 mm thick. I thought that with the tape covering it will have enough structural strength against being torn, and it would not be that bad if that section could curve out a little bit in flight, like in the case of a kite wing (there are no ailerons in my design).

[The testing of the electronic system did not work out: I have had some difficulties with this Turnigy Sentry ESC earleir as well. As if the voltage would be pulsating, the props (fan) will not turn but only "tremble", with the ESC heating up. I tried various programming options, no luck so far.]

Thanks for your comments.
Nov 16, 2009, 10:06 AM
Registered User
anthodenn's Avatar
Has Lee or anyone seen these yet? They are nice!

Oiseau rc bird type glider "condor" (1 min 22 sec)


http://www.youtube.com/watch?v=dApuM...eature=related

Aircraft Sailplanes FIRE HOOK split aileron (2 min 6 sec)
Nov 16, 2009, 05:28 PM
Dance the skies...
Tom Frank's Avatar
Quote:
Originally Posted by Pigeonflyer
...
Tom Frank:
Yes, I thought of that, thanks.
...
I thought that with the tape covering it will have enough structural strength against being torn, and it would not be that bad if that section could curve out a little bit in flight, like in the case of a kite wing (there are no ailerons in my design).
...
Thanks for your comments.
Sorry, I missed the part in your prior email about taping top and bottom. That will help a lot!
Nov 16, 2009, 05:38 PM
Registered User
G-LO's Avatar
Yeah Lee, what do ya think?! Any word on your birds yet!? That video sure is a good idea..Thanks for the video Bro....! See you I the field saturday*
Nov 21, 2009, 02:15 PM
Registered User

New Hawk


Just finished my 'Hawk'. Bad day for a maiden, so perhaps tomorrow.
I used the plans frank48 posted on post 98. Thanks frank48

gofish
Nov 22, 2009, 06:01 PM
Registered User
It flies!
Nov 23, 2009, 01:21 PM
Registered User
G-LO's Avatar
Gofish, that look great both bird on floor and especially in the air. Looks like it's finally "free"!
Nov 25, 2009, 02:50 AM
Registered User
Pigeonflyer's Avatar
Hi Everyone,
Let me just put here some update on how may depron eagle looks at the moment. What is left to be done is only painting and wing/fuselage covering (packing tape), otherwise the bird is complete.
Nov 29, 2009, 11:31 AM
Registered User
G-LO's Avatar
Mr Lee, if the New Peregrine will come in two models, (thin wing and thick),will the price differ?
thanks
Nov 29, 2009, 02:42 PM
Lee
Lee
PERFECT LANDING !!!
Lee's Avatar
Quote:
Originally Posted by G-LO
Mr Lee, if the New Peregrine will come in two models, (thin wing and thick),will the price differ?
thanks
If we cut two different airfoils the price will be the same. There are two designs we are considering. We can use the fat Assassin airfoil with a motor and make an indestructible powered bird or we can use an airfoil like the SD6060 and make a higher performance slope capable bird. I have several of each and they do fly different but each have their place.

Between my real job and the other planes we do we haven't had much time to devote to the Peregrine. It's the most complex plane we have ever cut and is very time consuming. I'll try to repent and get busy with the details. I know there are several EPP Peregrine enthusiasts waiting for the re-release and I thank you for your patience.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Why aren`t most foam planes made with EPP or equivalent. Scarey Foamy EDFs 2 Aug 31, 2015 10:02 AM
Planes Built With EPP And Depron. What Would Be Your Favorite. jbj620 3D Flying 10 Dec 05, 2004 08:06 AM
Rave Before n After My new war bird P-51 Mustang(EPP) powder Slope 22 Aug 22, 2003 02:27 PM
hey guys if yous are looking for arf war bird planes seafire Foamies (Kits) 5 Mar 10, 2002 06:41 PM