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Next D . Fast Lad Performance . Ace Hobby

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Scale Model RC Helicopters > Scratch building a 1/4 scale Jetranger and Longranger
 
 
FenderBean
Key Veteran
Location: savannah, Ga

wow all I can say is holy crap, thats a lot of work. Im just not that smart and why I have to buy all my stuff

What size is that going to be seems like huuuuuge landing skids
08-09-2008 02:14 AM
 
 
Brokenlink
Veteran
Location: Oakdale,Ca.

Start reading from the start of the thread,it says what size the skids are.
08-09-2008 02:31 AM
 
 
bcm
Senior Heliman
Location: Tuolumne,CA

they're 3/4 "
08-09-2008 03:20 AM
HOMEPAGE  
 
 
Brokenlink
Veteran
Location: Oakdale,Ca.

GEOOOOOOOOOOOOOOORGE!! The helis still comin along?
08-16-2008 07:29 PM
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Progress

Don't worry, I'm still working on them. Nothing exciting to photograph however. Just tweaking the final shapes of everything. The top cowlings have been adjusted and I'm finally saticfied with their shape. The 407 has a buldge on either side at the oil cooler location, so I've added that which was overlooked originally. I'm getting ready to glass the tail booms and cowlings this week. I'll post photos of that process.

Regards,
George
08-17-2008 12:51 AM
HOMEPAGE  
 
 
sparkyman
Senior Heliman
Location: uk

Hi George,

Just caught up with your build and very interested in how you glassed up the foam stabs & fins ?

Any chance you could give a little more detail on the process ?

I'm very interested in trying a simple piece myself, just to see how easy/difficult it is - your foam & former method I can follow, but I would really apprciate how you tackle the glassing of the foam patterns

Can you oblige ??

Thanks for your consideration
Best regards
08-17-2008 12:12 PM
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

glassing

Hi sparkyman, I'd be happy to elaborate on the glassing of the foam plugs.....hope this sheds some light on the process.

I'm sure there are other ways to do it, but this works for me.

I clean the foam of all sanding dust then lay the fiberglass down and apply the epoxy resin to the cloth, saturating it well. I use a squeegee to remove excess resin and avoid runs as the resin has a somewhat thin viscosity. Once cured, I mix up another batch of epoxy resin and thicken it with talc to the consistence of peanut butter and apply it with the squeegee to fill in the weave pattern of the fiberglass. The next day I sand the surface, prime to help show any imperfections which are then filled and sanded. Repeat until the surface is absolutely smooth.

Good luck with your project.

George
08-17-2008 04:19 PM
HOMEPAGE  
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Tail booms glassed

Hi guys,

Well I was going to glass the tail booms this week but with the approaching hurricane I decided to knock it out today.



All three have the initial layer of glass cloth and epoxy resin. Once it's cured I'll apply a thickened coat to fill in the weave.

Sorry I only took pictures after I cleaned up, too sticky to play with the camera during.

Until next time,

George
08-17-2008 09:39 PM
HOMEPAGE  
 
 
blt4ice
Veteran
Location: Newark, DE

Thanks for the updates George, great project and looking forward to your updates/progress.

Good luck during the storm if it comes your way, hope it fizzles out when it hits land.

Brian
Heli tools used: Torch, Pipe Wrench, 4 ft. crowbar
08-17-2008 10:54 PM
 
 
Brokenlink
Veteran
Location: Oakdale,Ca.

Now this is all still just the mould,or part of another step for the mould which you will use for the finished product?
It sure does look nice though.
08-18-2008 02:43 AM
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Plugs

Brokenlink, these are still the plugs from which the molds will be made.


Regards,
George
08-18-2008 10:43 PM
HOMEPAGE  
 
 
artimus
Veteran
Location: Puyallup WA

Quote 
prime to help show any imperfections which are then filled and sanded. Repeat until the surface is absolutely smooth.
Just wondering if you use a guide coat when finish sanding? I use guide coat powder on all block sanding to help show imperfections in Hot Rods and show cars that I do. Just wondering if you this technique when finishing your plugs?

AMA #890376..... Flying Helis is like sex ...you dont have to be good at it to enjoy it....
08-19-2008 03:52 AM
 
 
DKTek
Senior Heliman
Location: Melbourne, FL-USA

The guys in the hangar behind ours in Melbourne who assemble Velocity full scale kits built a blended wing design. They sprayed a very hard and glossy red final finish in their molds that assisted with the release agents. I was amazed at how silky smooth those molds looked and felt. The parts always popped right out with a light tap of a rubber mallet or palm of the hand. Their technique seems the same as Georges when they built their plugs and molds, down to the same blue foam and shaped ribs.

They also vaccummed the parts after the CF and resin was laid in. It removed any air bubbles and made for an even depth all around during the curing process. The vaccuum system was very simple and combined with the matt that went between the part and vacuum bag, made beautiful parts. Too bad the CF was painted (UV kills CF)after because it was a awesome sight to see a naked and partially assembled airframe.

The beatings will continue until morale improves...
08-19-2008 12:44 PM
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Tail booms

Hi Guys,

The only progress news I have is that I've been working on getting the tail booms all smoothed out. Here's a quick progress photo of where I'm at.



Until next time,
George
08-25-2008 04:00 PM
HOMEPAGE  
 
 
Pistol_Pete
Elite Veteran
Location: Tampa Bay non-Buccaneer

Keep'em coming.

They looks smooth as glass even in my old crappy monitor.

Dont know how you manage with this high humidity especially after FAY.

<><>...the lunatic is in my head...<><>
08-25-2008 04:07 PM
HOMEPAGE  
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Rivets

Started work on some of the rivets on the 206B horizontal stab



also stuck on a nav light housing just to see what it would look like.



Tomorrow I'm finally glassing the top cowlings and if all goes well I should have the fuselages glassed by the weekend.

Until next time,
George
08-27-2008 12:31 AM
HOMEPAGE  
 
 
marc28
Senior Heliman
Location: new york

lookin good george,can't wait for my winter project
08-27-2008 03:24 AM
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Cowl glassing

Before I get too messy here's a "before" photo of the cowlings in preparation of glassing.

*Update- This is a single layer of 6oz fiberglass cloth.



I'm back to work............
George
08-27-2008 03:05 PM
HOMEPAGE  
 
 
Pistol_Pete
Elite Veteran
Location: Tampa Bay non-Buccaneer

I probably missed it in previous post but...

do you use any form of vaccum when fiberglassing?

<><>...the lunatic is in my head...<><>
08-27-2008 03:08 PM
HOMEPAGE  
 
 
Rotor George
Senior Heliman
Location: Tampa, Fl

Cowlings glassed

Hi guys,

The cowlings are all glassed up and I am very happy with the way they turned out.

Well.... I'm taking a break for today.






@Pistol Peter, I don't use any vacuum assistance at all, it's hand laid from start to finish.

Until next time,
George
08-27-2008 07:51 PM
HOMEPAGE  
 
 
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Scale Model RC Helicopters > Scratch building a 1/4 scale Jetranger and Longranger
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