Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
July-2017
Mark Boesen's

Nice original Babe Bee from a Super Cub 105, late fifties.



PAST WINNERS
CEF Traveling Engine

Tach Race 2017 Updates
Ready for Tach Race 2017?
Profile Scale Reed Speed
Gallery


Win This Engine!
The Traveling Prop
World of Aviation

Profile F4 Phantom

Page 1 of 2 1, 2  Next

View previous topic View next topic Go down

Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 3:51 pm

url=https://servimg.com/view/19124486/81][/url]
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 3:52 pm

url=https://servimg.com/view/19124486/82][/url]
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 3:54 pm

url=https://servimg.com/view/19124486/83][/url]
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 3:56 pm

url=https://servimg.com/view/19124486/84][/url]
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 4:16 pm

Getting a jumpstart on next years reed speed
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  cox24711 on Mon Jan 18, 2016 4:17 pm

nice f4!
avatar
cox24711
Platinum Member
Platinum Member

Posts : 720
Join date : 2014-01-18
Age : 14
Location : Noosa Queensland Australia

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  NEW222 on Mon Jan 18, 2016 6:28 pm

Nice, very nice. I will be watching for the linkage set-up. Should be interesting. Is the wing made of foam? Just looks like it due to size and the appearance of tape on the edges and joints.
avatar
NEW222
Platinum Member
Platinum Member

Posts : 1017
Join date : 2011-08-13
Age : 38
Location : oakbank, mb

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  ARUP on Mon Jan 18, 2016 6:45 pm

That's definitely gonna be different! If you could only figure out a way to leave a nice thick black exhaust streak behind it. Huh... Laughing
avatar
ARUP
Gold Member
Gold Member

I Support My Forum

Posts : 179
Join date : 2015-09-13
Location : Kentucky

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  roddie on Mon Jan 18, 2016 7:47 pm

So I'm not the only crazy one in this bunch! Thumbs Up It appears that you have the 45" minimum wing-area for reed-speed.. but do you have the 15" min. span? It looks a little shy of that..
avatar
roddie
Top Poster
Top Poster

Posts : 4853
Join date : 2013-07-17
Age : 57
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 7:56 pm

roddie wrote:So I'm not the only crazy one in this bunch! Thumbs Up It appears that you have the 45" minimum wing-area for reed-speed.. but do you have the 15" min. span? It looks a little shy of that..
Ha ha, I actually built this because I liked the jet you built. My the wingspan is right at 16 inches.I'm a little worried how I'm going to balance it out, I might move the wing fwd a little.
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 8:02 pm

cox24711 wrote:nice f4!
Thanks Greg
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 8:10 pm

NEW222 wrote:Nice, very nice. I will be watching for the linkage set-up. Should be interesting. Is the wing made of foam? Just looks like it due to size and the appearance of tape on the edges and joints.
Thanks New, The wing is just cardboard, Not sure if I'm going to keep it like that or make one out of balsa
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 8:15 pm

ARUP wrote:That's definitely gonna be different! If you could only figure out a way to leave a nice thick black exhaust streak behind it. Huh...  Laughing
actually that would be two big black streaks. ha ha......I got a ride in one back when I got out of the airforce. Quite a different bird when you are sitting in it going Mach II.What a blast that was
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Nice

Post  happydad on Mon Jan 18, 2016 8:41 pm

akjgardner wrote:url=https://servimg.com/view/19124486/81][/url]

Very nice. I used to work on the Air Force versions back in the late 1960's in Japan.
    Loved that plane.

happydad. RC Plane Futaba Radio Jeep

United States United Kingdom Spain Hungary Northern Ireland Germany France Colombia Finland Canada Australia
avatar
happydad
Platinum Member
Platinum Member

I Support My Forum

Posts : 1155
Join date : 2012-05-28
Age : 71
Location : Escondido, CA

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 18, 2016 8:52 pm

happydad wrote:
akjgardner wrote:url=https://servimg.com/view/19124486/81][/url]

Very nice. I used to work on the Air Force versions back in the late 1960's in Japan.
    Loved that plane.

happydad. RC Plane Futaba Radio Jeep

United States United Kingdom Spain Hungary Northern Ireland Germany France Colombia Finland Canada Australia
Thanks happy dad, I worked on the F4E at Moody AFB from 81 to 85..... Great airplane
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  roddie on Mon Jan 18, 2016 8:52 pm

akjgardner wrote:
roddie wrote:So I'm not the only crazy one in this bunch! Thumbs Up It appears that you have the 45" minimum wing-area for reed-speed.. but do you have the 15" min. span? It looks a little shy of that..
Ha ha, I actually built this because I liked the jet you built. My the wingspan is right at 16 inches.I'm a little worried how I'm going to balance it out, I might move the wing fwd a little.

No kidding.. well.. as they say; "no balls.. no glory.." I'm glad you like my T33. I like your F4!! Radical stabilator you're designing there! I think there's a lot of merit to having some airstream-deflection forward of the hinge-line.. even with a fixed stab. I think it can help pitch the tail in the presence of turbulence off the wing.. but that's just a guess.

My uncle was an F4 mechanic in the U.S Air Force back in the early 70's.. so it was the first jet I ever really learned about. He enjoyed flying models back then, He, my grandfather and my dad flew control-line together. Another guy who flew with them had a dyna-jet powered F86!
avatar
roddie
Top Poster
Top Poster

Posts : 4853
Join date : 2013-07-17
Age : 57
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Re: Profile F4 Phantom

Post  getback on Tue Jan 19, 2016 8:35 am

Well Joe ,That's as fine as frog hairs there , glad to hear your wanting to get in on the action . Maybe I should start on something as long as it takes me to work out the details at the end of a build This Site Rocks! Eric Cold
avatar
getback
Top Poster
Top Poster

Posts : 4057
Join date : 2013-01-18
Age : 59
Location : julian, n.c.

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  rsv1cox on Tue Jan 19, 2016 9:11 am

Wow, a flying tail on a ukie, gotta see that. Has it ever been done before? Ought to change attitude right now! There would have to be some limits to the movement.

I always loved the F4, it just looks evil, but the test pilots at Pax River in Maryland didn't like to fly it. Took to many computers to keep it in the air, but they loved the A4 Scooter.
avatar
rsv1cox
Diamond Member
Diamond Member

Posts : 2233
Join date : 2014-08-18
Location : West Virginia

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Tue Jan 19, 2016 1:03 pm

rsv1cox wrote:Wow, a flying tail on a ukie, gotta see that.  Has it ever been done before?  Ought to change attitude right now!  There would have to be some limits to the movement.  

I always loved the F4, it just looks evil, but the test pilots at Pax River in Maryland didn't like to fly it.  Took to many computers to keep it in the air, but they loved the A4 Scooter.
Yes , I plan on putting limits on it. and yes the F4 is the only fighter that I know that looks like it was over G'd and Under Gd at the same time
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Mon Jan 25, 2016 5:48 pm

getback wrote:Well Joe ,That's as fine as frog hairs there , glad to hear your wanting to get in on the action . Maybe I should start on something as long as it takes me to work out the details at the end of a build This Site Rocks! Eric Cold
Thanks Eric. I thought I'd get an early start on it. I'll probably be rushed to get it done at the end anyway.I always seem to have 4 0r 5 projects going on at the same time.
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  roddie on Mon Jan 25, 2016 6:50 pm

rsv1cox wrote:Wow, a flying tail on a ukie, gotta see that.  Has it ever been done before?  Ought to change attitude right now!  There would have to be some limits to the movement.  

Bob, the Cox PT19's stab. is somewhat like that. With "up" input; it's leading edge actually drops below the pivot-point. Mine has what I'd say; a 30/70 split to where the pivot/hinge-point passes through the tail. Cox's design works.. and holds up to abuse.. which is a testament to good "Plastic Flying Model" engineering. Laughing

Scratch-building a stabilator isn't nearly as easy as hinging an elevator onto a fixed stab. It's essentially a tube (or pin..) within a tube (close-fit) .. with the outer being the sleeve-bearing. The sleeve-bearing is subject to stress.. and should be supported by (run inside) hardwood plates or an inset block for a profile fuse. It would quickly egg-out even hard balsa because of the horn being located off-center. The same larger size tube becomes the receiver on one side; for the smaller/longer pin or tube on the other. Then comes shimming to keep the stab.-halves from contacting the fuse.. and fusing the two halves together to move as one unit. That's my interpretation of it anyway. I'd like to try building a tail that way someday. I like the look too.
avatar
roddie
Top Poster
Top Poster

Posts : 4853
Join date : 2013-07-17
Age : 57
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Re: Profile F4 Phantom

Post  batjac on Mon Jan 25, 2016 8:01 pm

That's a mighty fine looking F-4 there. Can't wait to see flight video. Just eyeballing the pics, I can't really tell how much stab area you have ahead of the hinge line. For your first flights, I'd be really careful to set my throws to minimum for the first flights. You don't want to over-control the puppy.

The Conservative Mark
avatar
batjac
Diamond Member
Diamond Member

Posts : 1380
Join date : 2013-05-22
Age : 54
Location : Portland, OR, USA

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  roddie on Fri Mar 03, 2017 5:01 pm

Hey Joe.. where you going with that model-airplane in your hand.. Laughing (sorry.. had to make the Hendrix reference)

Have you done any more work on this jet? I love what you started! There hasn't been much speak about a future speed-contest.. but that shouldn't halt the build.. especially where you have some considerable time invested (me too, with the T-33) We should share concepts on a take-off dolly.

I really want to build one that works.. but there's a lot of variables to consider. Most of the dolly's I've seen are flat/level. My idea.. is to build-in some positive "angle-of-attack" to assist the model's lifting-off/out-of the dolly when it's take-off speed reaches that point. If the dolly is built-light enough; the model's ground-speed should be fast enough to generate enough lift to launch the model with neutral-elevator. This might help prevent "over-controlling" the model once it starts to fly.

A delta-wing will fly like a rocket.. and you'll want to have a chance at levelling it out "early-on" if possible.  

A dolly could utilize a "stooge-launch" if needed.. but even if assisted by a pit-man; it should have some tracking-adjustment tangent to the flight-circle. If the dolly only tracks straight-ahead; it will likely "crab" when the lines tighten.. and tip inward; slowing the take-off speed.. and fouling the launch. The pilot can always take a step or two backward, with a dolly that tracks into the circle.

https://www.youtube.com/watch?v=W3JsuWz4xWc
avatar
roddie
Top Poster
Top Poster

Posts : 4853
Join date : 2013-07-17
Age : 57
Location : N. Smithfield, Rhode Island

View user profile http://www.stilburnin.com

Back to top Go down

Re: Profile F4 Phantom

Post  getback on Fri Mar 03, 2017 5:47 pm

Hey Joe, you going to getback on that machine soon ?!!??! This Site Rocks!
avatar
getback
Top Poster
Top Poster

Posts : 4057
Join date : 2013-01-18
Age : 59
Location : julian, n.c.

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  akjgardner on Fri Mar 03, 2017 6:04 pm

ha ha , the Jimmy reference was cool, Thanks for the kick start on the f-4, I need to finish it up. Iv'e been busy converting a couple of comet superstars models into " I can,t beleive the they,re not cox models".one is a fw 190 the other is zero. A baby bee fits on the nose real nice. They are about the size of a cox pt19. as far as launching the f4, I think i'm going to have my son hand launch it over a soybean field.I do want to build a couple of stooge's. actualy , i was going to build one like the one you built.Thanks again for the comment on the Phantom.
avatar
akjgardner
Platinum Member
Platinum Member

Posts : 671
Join date : 2014-12-28
Age : 57
Location : Milan Indiana

View user profile

Back to top Go down

Re: Profile F4 Phantom

Post  Sponsored content


Sponsored content


Back to top Go down

Page 1 of 2 1, 2  Next

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum