Go Back  RCU Forums > RC Airplanes > RC Jets
Reload this Page >

F-4 Phantom 1/8 scale Scratch Built

Notices
RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

F-4 Phantom 1/8 scale Scratch Built

Old 06-03-2020, 02:26 PM
  #51  
Dave Wilshere
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 11,333
Likes: 0
Received 68 Likes on 62 Posts
Default

I need to order some more balsa stock 😄
Old 06-03-2020, 02:34 PM
  #52  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Hello Kevin,

Thanks for you nice comment, I love building so much, maybe more than fly ;-))
Old 06-03-2020, 02:34 PM
  #53  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Dave,

And CA and activator ;-)),
Old 06-03-2020, 02:53 PM
  #54  
jofunk
 
Join Date: Mar 2009
Location: willow springs , IL
Posts: 1,134
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Dave Wilshere View Post
I need to order some more balsa stock 😄
According to the Balsa USA ad in the latest AMA magazine there is a shortage of balsa right now and it is affecting the prices on their kits...........BTW this is a great scratch building thread. Very interesting to watch.
Old 06-03-2020, 04:23 PM
  #55  
jcterrettaz
 
jcterrettaz's Avatar
 
Join Date: Jul 2007
Location: Carp, ON, CANADA
Posts: 318
Received 0 Likes on 0 Posts
Default

Ok, that will be interesting ... very sweet little turbines

Old 06-03-2020, 08:57 PM
  #56  
Dave Wilshere
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 11,333
Likes: 0
Received 68 Likes on 62 Posts
Default

It’s true about balsa, though I think you guys over there more than us at this time. Many of the wind turbines use balsa in the composite blades and each blade would build hundreds of models

Dave
Old 06-04-2020, 12:24 PM
  #57  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Hello Joe,

Thanks for your interest,

Yes, I think I will end up using over 50 balsa sheets, costing , :-)),
Old 06-05-2020, 11:06 AM
  #58  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default Turbine Position,

When I started the project, I wasn't sure if I will locate turbine to the end of Fuselage, means no "Tail Pipe", or to help the CG I move it forward. This is why I made a mount long enough to be able to position turbine eater way.

I conclude to move forward turbines, which means have two turbines about 20cm closer to CG, means I would need to instal two tail pipe. Now that I wont need engine mount in far back position, I cut them and I saved 65 gram, which is almost as same as one of tail pipes :-)),




Last edited by Javad; 06-05-2020 at 11:12 AM.
Old 06-05-2020, 11:30 AM
  #59  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default Building up belly, top of turbines to middle of wing,

As I have one pice wings, it meant formers have cut from middle to accommodate wing in middle of fuselage. Therefore, I need to build up belly shapes using small lower part of formers by attaching & gluing them below the wing:










Last edited by Javad; 06-05-2020 at 01:04 PM.
Old 06-05-2020, 03:25 PM
  #60  
Boomerang1
 
Boomerang1's Avatar
 
Join Date: Jun 2005
Location: Sydney, AUSTRALIA
Posts: 2,883
Received 0 Likes on 0 Posts
Default

Will you be adding braces, to replace the former sections you removed, to maintain fuselage stiffness?
Lovely timberwork.

Fortunately I'm on the other side of a scratch build, mine's in primer & ready to test fly.
Old 06-05-2020, 03:45 PM
  #61  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

No, I'm not adding any braces, once I finish, I'll use a 25gram glass for all fuselage,

What are you making? please send me the link to have
look,
Old 06-05-2020, 09:27 PM
  #62  
Boomerang1
 
Boomerang1's Avatar
 
Join Date: Jun 2005
Location: Sydney, AUSTRALIA
Posts: 2,883
Received 0 Likes on 0 Posts
Default

I'm building an Aermacchi 339. Link to the second last page, you can work your way back from there.

https://www.rcscalebuilder.com/forum...69&PN=2&TPN=16

A project that's taken far too long due to interest starting & stopping a few times.
Current status - ready to test fly in primer.
Old 06-16-2020, 04:08 PM
  #63  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Hello Again,

Slowing down progress, to have some fly

Though little progress on finishing tail and opening door to access to Elevator servos etc,

















Old 06-18-2020, 08:55 AM
  #64  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default In take & Belly

Hello Again,

More rain, more time for sanding balsa :-)),

Taking off from grass, means more grass cuts (sometimes wet) into the in takes, so I decided to do planking for inside the formers as per photos.

Also, having one pice wings, part of Belly needs to build up and glued to bottom of the wing, so this part is finished too.

I used 25gram fibreglass for wings as well as fuselage, however, Dave (Wilshere), advised me to have two layers of fibre glass on belly, so I did so. So, if one day landing gears decided not opening and cause a belly landing, belly can handle it :-))

,
















Last edited by Javad; 06-18-2020 at 11:01 AM.
Old 06-18-2020, 10:47 AM
  #65  
JP-1
 
Join Date: Nov 2009
Location: Newark-On-Trent, UNITED KINGDOM
Posts: 1,489
Likes: 0
Received 175 Likes on 167 Posts
Default

Quality work Javad, looking good.

Alistair P.
Old 06-18-2020, 11:54 AM
  #66  
JSF-TC
My Feedback: (2)
 
JSF-TC's Avatar
 
Join Date: May 2002
Location: Fort Worth, TX
Posts: 1,038
Likes: 0
Received 11 Likes on 8 Posts
Default

Amazing workmanship.

I don't see any balsa dust anywhere in your workshop.............. This must be fake;-)


Paul
Old 06-18-2020, 12:36 PM
  #67  
kevinthoele
My Feedback: (1)
 
Join Date: Feb 2002
Location: Spring, TX
Posts: 1,429
Likes: 0
Received 4 Likes on 4 Posts
Default

Awesome work for sure. I would be covered in balsa dust if it were me. His place does look pretty clean!!!!
Old 06-18-2020, 01:50 PM
  #68  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by JP-1 View Post
Quality work Javad, looking good.

Alistair P.
Thanks Alistair,

Still long way to finish :-))

Javad,
Old 06-18-2020, 01:53 PM
  #69  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by JSF-TC View Post
Amazing workmanship.

I don't see any balsa dust anywhere in your workshop.............. This must be fake;-)


Paul

Hello Paul,

Thanks;
The trick is I take photos after cleaning :-)), You could see my brush on table,
Javad,
Old 06-18-2020, 02:22 PM
  #70  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by kevinthoele View Post
Awesome work for sure. I would be covered in balsa dust if it were me. His place does look pretty clean!!!!
Hello Kevin,

Hope you are doing well,

I was going trough a thread you started as "Skymaster 1/6 scale F4". There was some suggestion that Skymaster F-4 was in need for more power, while It was flown by 2 p100, or single K-210. So I thought maybe my choice to have 2 Xicoy x45, wouldn't be enough?!!

That sky master was 63lb on take off though, I believe my project would be 17lb dry& almost 20lb ready to take off (1/8 Scale). And two Xicoy also deliver 20lb trust

You mentioned you have flown many different F-4s, what do you think? Do you think two Xicoy X45, would deliver enough Power?

Dave (Wilshere) suggesting maybe I wont achieve 17lb dry, so Imagine if I end up, let say 20lb dry and 23lb ready to take off, what about this situation? do you think 20lb trust is still enough?

Thanks,

Javad,

Last edited by Javad; 06-18-2020 at 02:44 PM.
Old 06-18-2020, 03:34 PM
  #71  
yeahbaby
My Feedback: (21)
 
yeahbaby's Avatar
 
Join Date: Dec 2001
Location: FT Worth, TX
Posts: 6,280
Received 4 Likes on 4 Posts
Default

The SM F4 weighs 40lbs dry with an AMT OLympus HP. Keep up the great work. Your woodwork is impressive.
Old 06-19-2020, 07:18 AM
  #72  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by yeahbaby View Post
The SM F4 weighs 40lbs dry with an AMT OLympus HP. Keep up the great work. Your woodwork is impressive.
Hello there,

If I don't mistake, you mean small version of SM F4 weights 40lbs, yes?

The one I mentioned 63lb ready to fly is the large one, 1/6 scale, which is very big,

Javad,
Old 06-19-2020, 08:25 AM
  #73  
kevinthoele
My Feedback: (1)
 
Join Date: Feb 2002
Location: Spring, TX
Posts: 1,429
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by Javad View Post
Hello there,

If I don't mistake, you mean small version of SM F4 weights 40lbs, yes?

The one I mentioned 63lb ready to fly is the large one, 1/6 scale, which is very big,

Javad,
They make three sizes. The one Buck and I fly are the middle one. The 1/6 you mentioned does weight 63 but they are flying those with twin 160 to twin 200

If you get weight in the 20-22 pound range you should be good. I would not put tons of stuff under the wings until you see how it goes

Keep up the great work!!
Old 06-19-2020, 10:45 AM
  #74  
Dave Wilshere
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 11,333
Likes: 0
Received 68 Likes on 62 Posts
Default

Javad

Kevin means Stores, rockets, missiles and tanks!

Dave
Old 06-19-2020, 11:14 AM
  #75  
Javad
Member
Thread Starter
 
Join Date: May 2020
Location: London
Posts: 90
Likes: 0
Received 4 Likes on 4 Posts
Default

Originally Posted by kevinthoele View Post
They make three sizes. The one Buck and I fly are the middle one. The 1/6 you mentioned does weight 63 but they are flying those with twin 160 to twin 200

If you get weight in the 20-22 pound range you should be good. I would not put tons of stuff under the wings until you see how it goes

Keep up the great work!!

Hi Kevine,

Thanks, I try my best to keep weight low, I just hope to escape from lead on nose :-),

Javad,

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.