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Search: Posts Made By: Bach-RCU
Showing results 1 to 25 of 46
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Forum: Composites Fabrication And Repair
11-25-2005, 09:24 AM
Replies: 8
Views: 1,369
Posted By Bach-RCU

RE: Has anyone tried to separate mold with wax only ?

So anyway, I used only Dolphin wax 10 applications on small electric airplane plug ( ww2 fighter) and it worked perfect. The plug had fiberglass polished surface, the tooling layer was the Fiberglast...
Forum: Composites Fabrication And Repair
11-23-2005, 08:44 PM
Replies: 8
Views: 1,369
Posted By Bach-RCU

RE: Has anyone tried to separate mold with wax only ?

that was just historical - I had Partall before DOLPHIN -- but what a pain in the ...

I now use only Dolphin,

but my reason for using wax only is exactly that I have been unable to achieve...
Forum: Composites Fabrication And Repair
11-23-2005, 04:12 PM
Replies: 8
Views: 1,369
Posted By Bach-RCU

Has anyone tried to separate mold with wax only ?

I have made 3 molds, but I have always used wax (Partall 2 x and Dolphin 1x) + PVA to pull the molds off the PLUG.

Then I used the PVA for the first 2-3 parts and then I just used the Dolphin...
Forum: Composites Fabrication And Repair
10-28-2005, 03:41 PM
Replies: 2
Views: 606
Posted By Bach-RCU

epoxy coat

Fighting two problems:

1. when applying the epoxy coat mixed with carbon powder on the plug (the first step in making the mold), it usually flows down the gravity and then the highest points on...
Forum: Hitec/MultiPlex Radios- Ask Hitec Customer Service
04-16-2004, 09:15 AM
Replies: 5
Views: 3,579
Posted By Bach-RCU

RE: RF Module for Eclipse

Just an update for folks who may need this info in future:

Spectra will be available in 35 Mhz frequency in Europe later this year.
For the time being I ordered the single frequency trasmitter...
Forum: Hitec/MultiPlex Radios- Ask Hitec Customer Service
02-22-2004, 10:12 PM
Replies: 5
Views: 3,579
Posted By Bach-RCU

RF Module for Eclipse

I will be traveling to Europe and fly some RC Combat there.
Is it possible to purchase RF module for my Eclipse, so that it can be used there ? Does then my system need to be shipped to Hitec for...
Forum: Tips & Techniques
01-09-2004, 11:53 AM
Replies: 8
Views: 6,783
Posted By Bach-RCU

RE: How do you cut a true elliptical wing from foam?

Michael,

the video, that I have form tekoa at the end shows cutting the elliptical wing tip for a P-47 type wing.
Roger from tekoa answers there that "It could be more scientific, but I learnt...
Forum: RC Scale Aircraft
12-15-2003, 05:50 PM
Replies: 3
Views: 609
Posted By Bach-RCU

Bf-109G spinner

Anybody knows where can I get scale looking spinner for Bf 109G ?
Size 3.25 - 3.75 inch ?

Bach
Forum: Electric RC Jets
09-16-2003, 10:54 AM
Replies: 5
Views: 2,231
Posted By Bach-RCU

Horten IX twin EDF

I built and flew 1/12 scale Horten IX in RC combat. It is powered by OS 25FX engine.
At the RC Combat Nationals in Muncie it flew great. I really love Hortens !
I am attaching a couple of pics:
...
Forum: Composites Fabrication And Repair
06-18-2003, 08:35 PM
Replies: 5
Views: 1,680
Posted By Bach-RCU

Can I use epoxy to repair fiberglass fuse

epoxy will work well.
Make sure that you sand lightly the surfaces and properly degrease by isopropylacohol.
Then, brush the inside of the cracked fuse by epoxy, lay pieces of reinforcement, then...
Forum: Aerodynamics
05-23-2003, 07:21 PM
Replies: 9
Views: 1,244
Posted By Bach-RCU

Yaw stability

Thanks for your replies.

The model in question is a scale combat Ho-9, which is a flying wing.
So far on my conventional models with fuse I used the method of Center of Lateral Area, which is...
Forum: Aerodynamics
05-13-2003, 02:48 PM
Replies: 9
Views: 1,244
Posted By Bach-RCU

Yaw stability

1.Provided, that the surface area is the same and the distance from CG to the vertical stab MAC same: Is the effectivness of outboard placed vertical stabs on the flying wing same, worse or better...
Forum: Scratch Building, Aircraft Design, 3D/CAD
04-25-2003, 07:15 PM
Replies: 12
Views: 1,660
Posted By Bach-RCU

Books on designing model airplanes?

Andy Lennon's book is great !!!

My vote

Petr Bachan
Forum: Composites Fabrication And Repair
04-25-2003, 07:08 PM
Replies: 9
Views: 1,395
Posted By Bach-RCU

post curing

the idea with carbon sounds right. Carbon is a weak conductant. I do not know what rsistance in ohms doe it have.I would first use some carbon sheet, connect to the current, that you are going to use...
Forum: Composites Fabrication And Repair
02-12-2003, 08:08 PM
Replies: 5
Views: 741
Posted By Bach-RCU

epoxy running

Thanks dsbeliever,

I'll try

PB
Forum: Composites Fabrication And Repair
02-06-2003, 02:03 AM
Replies: 5
Views: 741
Posted By Bach-RCU

epoxy running

I used microballons more than aerosil. If you mix it too thick, then it tends to form small bubles, if it is too thin, then it runs.
I tried to tilt the molds every 15 mins, so it disperses more...
Forum: Composites Fabrication And Repair
02-05-2003, 09:22 PM
Replies: 5
Views: 741
Posted By Bach-RCU

epoxy running

When I make my fuse I usually brush coloured epoxy into the mold first, then wait about 1 1/2 hour until it is just slightly tacky and them apply first layer of the cloth.
However each time I see...
Forum: Composites Fabrication And Repair
01-09-2003, 03:47 AM
Replies: 13
Views: 2,210
Posted By Bach-RCU

Gelcoat ?

Goggles,

As you know I did not mean the polyester gelcoat, which is applied by use of gelcoat cup spray gun.

I meant layer of epoxy - some people call it "gelcoat" maybe inapropriately for the...
Forum: Composites Fabrication And Repair
01-08-2003, 04:32 PM
Replies: 13
Views: 2,210
Posted By Bach-RCU

Gelcoat ?

When I used my couloured west epoxy gelcoat into the mold - it was running .
I turned the molds twice and scooped the accumulated runned down epoxy.
How do you guys manage this problem ?

Petr
Forum: Composites Fabrication And Repair
01-05-2003, 02:56 PM
Replies: 17
Views: 5,109
Posted By Bach-RCU

Fibrelease

Mike,

I have pulled 3 fuses using wax/PVA so far without problem.
So, let's say 5 with PVA and then I can try just with wax ?

Petr
Forum: Composites Fabrication And Repair
12-16-2002, 03:29 PM
Replies: 7
Pva
Views: 947
Posted By Bach-RCU

Pva

I have now used fine foam 1 inch brush - 2 coats and it has worked perfect.
Petr
Forum: Composites Fabrication And Repair
12-05-2002, 05:01 AM
Replies: 5
Views: 776
Posted By Bach-RCU

I need urgent help !!!

Never mind,

I took it out ..
Cleaned those few places by denat. alcohol. It went fine. Just wondering what caused the PVA to stick so lightly to the base.
One thing, that might caused it was,...
Forum: Composites Fabrication And Repair
12-05-2002, 03:51 AM
Replies: 5
Views: 776
Posted By Bach-RCU

I need urgent help !!!

I am lying up fuselage - this is the 2nd lay-up in these molds.
4 layers of Partall #2 and PVA.
During rolling and stipling on the cloth the PVA starts to lift at few places, especially at the...
Forum: Composites Fabrication And Repair
12-03-2002, 03:11 PM
Replies: 17
Views: 5,109
Posted By Bach-RCU

Fibrelease

Thanks for help,

yes I used Partall #2. I will try fine foam brush next time.
Petr
Forum: Composites Fabrication And Repair
12-02-2002, 09:06 PM
Replies: 17
Views: 5,109
Posted By Bach-RCU

Fibrelease

Thanks Peter,
That's what I decided to do. I took the wing saddle cutouts for experiment. I cleaned one with Fantastik and then rubbing alcohol, and applied the Fibrelease. I will test it tonight.
...
Showing results 1 to 25 of 46
 
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