Fafnir 4m - Cem

czirh · Posté le: 02/10/2009 13:24 Sujet du message: Fafnir 4m - Cem

My winter time project , 4 mt. Fafnir. Very Happy

Plan: Vince Cockett

VincentB · Posté le: 02/10/2009 14:57 Sujet du message:

Great project Cem [clap]

so, you have reduced a little his plans? 4m it's a good size for the slope, easier than 5m to launch

czirh · Posté le: 02/10/2009 17:54 Sujet du message:

czirh · Posté le: 02/10/2009 18:01 Sujet du message:

Today I started the fuselage. Very Happy

czirh · Posté le: 03/10/2009 08:12 Sujet du message:

I have a proplem , with Fafnir.
Fafnir has not air-break..! My place have much winds and some times powerfull thermals.
Any suggestlons?
Thank you.

czirh · Posté le: 03/10/2009 19:33 Sujet du message:

Today..

cw · Posté le: 03/10/2009 23:04 Sujet du message:

Cem, if you are flying in difficult conditions you will always need some form of glide-path control. I would reccommend fitting a set of small spoilers (not airbrakes!) and then arranging the mixers in your radio transmitter to raise the ailerons with the spoilers to about half of their upward travel. This will give you a very powerful means to control your landings. It is a small deviation from scale, but better than a bag of broken bits... Sad

cw · Posté le: 03/10/2009 23:11 Sujet du message:

Here is another idea...you could split the ailerons and use C.R.O.W. braking. Look at this half scale Orlik from last weekend: just think of the mixing involved...! Wink

VincentB · Posté le: 04/10/2009 04:55 Sujet du message:

Hi Cem, with my MG9, when there are wind, there are no problem without airbrakes. On the Fafnir, the airfoil is very thick, I don't think you will have any trouble for landing without airbrakes. You can ask to Vince, what he think of this.
You will cover your Fafnir with plywood + varnish?

czirh · Posté le: 04/10/2009 19:17 Sujet du message:

czirh · Posté le: 04/10/2009 19:33 Sujet du message:

DirkSchipper · Posté le: 05/10/2009 20:06 Sujet du message:

Hello,

I also planned Fafnir after the design of Vincent Crocket, but did not yet get the time to start. Why is an other story.

I had some mailings with Vincent Cocket and asked him about the "missing" airbrakes. The original Fafnir didn't have them either. So if you plan to construct really scale, you have to do without them.

I asked Vince about landings without. He answered me that's no problem. He sets the ailerons high, like a F3B crow-brake, but without the flaps down. Works very good for him, he told me.

With this brakes, I expect the need to do some (a lot?, down) compensation on the elevator.

Greetings,
Dirk Schpper.

czirh · Posté le: 06/10/2009 07:38 Sujet du message:

Half formers..

Laurent14 · Posté le: 06/10/2009 08:02 Sujet du message:

Hi Cem,

A nice work in DHC (in french, découpe à l'huile de coude).
In english, COE - cutting oil elbow. Wink

google translate

Stephan · Posté le: 06/10/2009 08:16 Sujet du message:

Cem
how have you get copied the formers and ribs so properly from the plan to the play wood [humm]

Stephan

czirh · Posté le: 06/10/2009 16:17 Sujet du message:

czirh · Posté le: 06/10/2009 16:54 Sujet du message:

DirkSchipper · Posté le: 06/10/2009 17:41 Sujet du message:

C'est encore plus facile: te fait un photocopie ou impression laser.
Couleur noir, tres dense.
Coté copie en bas, contre le bois.
Tenir en place, passer aver un fer a repasser bien chaud.
Comme ca om peut faire deux qq fois trois copies.

In Enlish:
It's even easier.
Make a copy or laser-print. Color = black, high density.
Print-side facing the wood.
Secure the paper by hand/tape/... and pass over with a hot (flat)iron.
This way you can make at least 2, sometimes 3 copies from 1 print.

Dirk.