Dear Friends,

After a busy time due to the birth of my daughter and work, I finally found some time to start working on the Red-Devil which is actually an old style Blue-Angel.

The German company Steinhardt sells a GFK fuse, canopy, wing fairing and plan for this Red-Devil

In fact I bought 2 fuse sets and me and my father (who flew competition with the original Blue-Angel in the mid 70ties) have started cutting the foam wings, stabilisor and have almost finished preparing all the balsa and plywood parts.

The nice thing about this fuse of the Red Devil is that it is almost a complete copy of the original old-style World champion Blue-Angel which Yoshioka flew in 1973

The only major difference is the vertical stabiliser which is a little higher as the little fin on the bottem of the fuse is missing.
Also the horizontal stabilisortips and wingtips need some small changes

Nothing that cannot be changed with a saw and some proper balsa

Perfect chance to built a Blue-Angel when you do not have the building skills (or patience) like 8178 or Dhall
(as the Blue-Angels of these two have set some very high standards!)

So soon more to follow!

Regards
Gert

Later this week I will add pictures of the progress so far.

Hi,

What size is the fuselage? I have a MK Blue Angel 20 kit without a fuselage. Wings, stab and fin are available. I yours is a 20, you're welcomed to take a copy of the parts I have.

Dave

Dave,

Thank you very much for your offer!

But this is a 60 size, and Steinhardt only offers a 40 and a 60 size Red-Devil/Blue-Angel fuse

Maybe you should make this offer to the guys in the thread concerning the 20 size classic pattern planes.
I think they would appreciate it very much.

Thanks again for your response, it's always nice to see that there are classic pattern lovers all over the planet.[sm=thumbup.gif]

Regards,
Gert

Thanks. Back to square 1 again. I've tried plugging into David O's thread on the 20 sizers. I'll keep a watch out and also look forward to your thread updates.

nice, looking forward to it. lots of photos please.

Hi David,

I will do my best.
Later today I will make the first pictures and place them in this thread.

Most wood/multiplex parts have been made and the cutting of the wings and stabilisors went quite well.
Although the topview as drawn in the Red-Devil drawing does not match the actual outer rib of the horizontal stabilisor (the length of the actual rib drawn is longer then is shown in the topview)

Still have to make several decisions concerning engine choise and the finish (normal covering materials or epoxy)

So soon more to come.

Regards,
Gert

Gert,

Thanks for sharing your build with us; I’m really looking forward to following along.

Ok Gert!

Get to work. A buddy of mine had one these birds with an OS Max 60 Gold Head back in the early 80's. Very nice plane.

Paul

Okay then, here are the first pictures.

Pictures attached show the foam wings and stabilisors we cut, with the leading and trailing edges already glued on.

Pictures do not show, so I will try again

Also some pictures with a comparison of the Red Devil Fuse and the old style BA drawing.
As you can see the fuse is identical to the BA
Only the vertical stabilisor is different from the original BA, as it is higher and the fin underneath the fuse is missing.
We will shorten the stabilisor as per BA drawing and add a fin to the bottem of the fuse.

Also we already cut out the elevator halves and frames for the retracts and some other parts.

Also the wing tips of the original BA drawing were used, as the Red Devil type has ailerons which continue all the way to the wingtip.
The same we did for the horizontal stabilisor.

The picture clearly shows the RD wingtip and stabilisor tip and the (roughly shaped) BA style wingtip

Still have many decisions to make.

What engine to use for example.

I have the normal O.S.61 side exhaust engine and the Irvine61 side engine, but also a few engines which are more "exotic"
An OPS61, an HP61 Gold cup and a O.S.61 VF

Any suggestions?

Regards,
Gert

That OPS gets my vote.

OPS vote #2

OPS for sure.

Good to have problems like this, which NIB engine to use!
Chris...

Gert,

Love the Italian engines (how couldn't you), but a Japanese designed Blue Angel strikes me as deserving a Japanese engine - the natural choice being a YS FS round head. That VFR however looks interesting - only problem is that it is RE which doesn't suit the BA. I'd go with the regular SF if you have one (sounds like you do) with pipe slung under the wing.

My 2c, David.

P.S. Interesting build.

NICE problem to have...LOL geesh

OPS-

Thanks everybody for the advice.

The OPS 61 is very tempting and it was only run in, has never flown.
It is a very reliable engine, starts with one swing against the prop and idles also beautifully.
On the testbench it ran a 13" prop with the same rpm's as the 11", with the 11" it just would not go higher in rpm's then with the 13"
So the prop to choose will be most probably a 11x11
The only problem is the exhaust pipe, as it hardly silences and in the Netherlands we go to max 80db at 7metres.
The exhaust connection on the cilinder is somewhat overdesigned and a normal header won't fit.
So I will need to have a header made.

Personally I like the looks of the HP61-F Gold Cup, but it has never run and I have no idea if it will perform like a pattern engine.

Also still lying around is the original Enya61X, and as far as I know that is the engine Yoshioka used with a different carburator (as the original was useless)

I also have some Webra 61 speed engines (side and rear exhaust, long and short stroke)
Looking at noiselevels the Webra 61LS with a Hatori pipe and 11x11 prop is the winner as it is very quiet

For now I will put all the engines next to each other on the table and look at the pro's and con's, and as I still have to install the engine mount all options are open.

Choises choises[sm=spinnyeyes.gif][sm=spinnyeyes.gif]

Regards,
Gert

the ops engines header is available froms macs products, no big deal.. and a quiet pipe as well is available macspro.com

anyone read german?
http://www.modellbau-steinhardt.de/

just drop the site address in google translate.

did that, things went haywire on me. I will ty later

Hey Gert,

You might want to consider the engine weight. I seem to recall that people building Blue Angels have trouble with the CG ending up too far forward. There might even be something about the CG in Mike's Blue Angel thread, if I find any reference I'll post again.

The engine Yoshioka used in his Blue Angel, and the engine the MK kit was designed for, was the Enya 60 B-III. The 60 B-III wasn't a Schnuerle-ported engine, it was cross-flow scavenged. I think the 61X was a later, Schnuerle ported engine. [link=http://www.enya-engine.com/ListCL_E.html]Enya still supply a control-line version of the 60 B-III.[/link]

The Enya 60 B-III only weighs 380 grammes. A later, Schnuerle ported engine, as we will tend to use in a ship like this today, will weigh a bit more. For example Webra 61F, as used by Prettner in the Super Sicroly II and Curare, and by Matt in the Atlas, and [link=http://www.webra-austria.at/motor.php?search=1024&folder=AERO&lang=DE]still made by Webra[/link] weighs 445 grams.

I too have a pair of Webra 61 LS long stroke, mine are rear exhaust. I haven't weighed them but I'm sure they weigh a bit more than my 61F.

And about the HP 61 Gold cup, going from the [link=http://www.mecoa.com/hp/61/2203.htm]specs given by MECOA for the HP 61 Gold Cup they make today[/link] the weight is 17.1 ounces, or 485 grammes, that's over 100 grams more than the Enya 60 B-III.

Best regards,

George