Notation of french horn

[Helge Kruse]

Hello,

I am typesetting a concerto in G major. There are two brass instruments 
(french horns). I am was told that these staves should be written 
without key an without accidentals at the notes. I don't have neither 
experience with playing praxis of horns nor with notation for this kind 
of instruments.

What is the best way to do this? Should I write it without all the F# 
notes? Or is there anything like transposing from normal notation to 
horn (or brass) notation? AFAIK is transposing the change of all pitches 
by a value, not the change of a selection of pitches, isn't it?

As an example here are the firs five measures of three instruments

Helge


\version "2.14.2"

CornoOneAllegro = \relative c'' {
  \clef treble
  c4 c c r | % 1
  r2 r8 c c4 | % 2
  r2 r8 c c4 | % 3
  g4 g g r8 d' | % 4
  e4 fis8 e e d r4 | % 5
}

CornoTwoAllegro = \relative c' {
  \clef treble
  \key g \major
  c4 c c r | % 1
  r2 r8 c c4 | % 2
  r2 r8 c c4 | % 3
  g'4 g g r8 d' | % 4
  e4 fis8 e e d r4 | % 5
}

AllegroHarpRight = \relative c' {
    \clef treble \key g \major \tempo Allegro
    R1*5
}

AllegroHarpLeft = \relative c{
    \clef bass \key g \major
    g'4 g r8 g32( fis g16) g,8 r      | % 1
    r2 r8 g'32( fis g16) g,8 r      | % 2
    r2 r8 g'32( fis g16) g,8 r      | % 3
    fis' g fis e d4 r8 fis      | % 4
    g4 c, d8 d, r4      | % 5
}

    \score {
      \new StaffGroup <<
        \new Staff=CornoOne { \CornoOneAllegro  }
        \new Staff=CornoTwo { \CornoTwoAllegro }
        \new PianoStaff <<
          \context Staff=right \AllegroHarpRight
          \context Staff=left \AllegroHarpLeft
        >>
      >>
      }