Hearts of Iron IV - Developer Diary 9 - Vacation and Air tech

podcat

Game Director
Super Moderator
12 Badges
Jul 23, 2007
12.788
38.228
  • Europa Universalis IV
  • Hearts of Iron III
  • Semper Fi
  • 500k Club
  • Europa Universalis III: Collection
  • Europa Universalis IV: Pre-order
  • Hearts of Iron II: Beta
  • Europa Universalis: Rome Collectors Edition
  • Mount & Blade: Warband
  • Paradox Order
  • Hearts of Iron IV Sign-up
  • Hearts of Iron IV: Together for Victory
Hello guys and gals! Most of the HOI4 team is currently on a much needed summer vacation, but we figured we couldn't just leave you hanging without a diary this month, so let's get to it *puts down beer* *cracks knuckles*.

The Air Technology tree is similar to the Armor tech tree we showed back in diary 2 in that we are focusing around chassis and unlocking specific historical equipment/models that those versed in WWII will be familiar with.
Hearts of Iron III had a lot of different airplane classes but that still ended up not being able to match what nations historically did with their planes, which was use them for many different roles. In HOI4 we have gone the other way and dropped a few classes while instead letting you specialize them in the direction you want to go yourself using field experience (see Diary 8 for more details). This means that Interceptors, CAG (Carrier Air Group) and Multi-Role from HOI3 are gone and its up to you to decide what models to tailor for each role. Do you specialize to create the perfect plane for a role, or try to develop a fighter that can fulfil all your different fighter/interceptor/escort needs for ease of production?

dd9_mustang.png


Air technology is split up around 3 airframe sizes: Light, Medium and Heavy. Light is single engine while mediums are generally twin engine and Heavy have 4 engines or more. After the invention of Jet engines it's also possible to research powerful jet models. Each of the light airframe techs also has a sub-tech that unlocks a carrier capable model. We felt that extra research investment was necessary for this because of the trouble many nations had with perfecting their carrier-based planes. This also highlights another important change from HOI3 - instead of the CAGs you are free to put any planes that are capable on your carriers and thereby configure their capabilities for different types of missions. There are also experimental rocket interceptors available, but they live among the Secret technology tree so we will talk about those later.

dd9_us_airtech.jpg


That's all for now folks, time to get back to the beer! Next diary is probably going to be about the naval aspects of the game.

oops, I almost forgot we promised to include a picture of one of Darkrenown's dogs. Here is Domino testing out the new naval invasion code for HOI4:
P9120275.jpg
 
Last edited by a moderator:
  • 13
  • 1Like
  • 1
Reactions:

podcat

Game Director
Super Moderator
12 Badges
Jul 23, 2007
12.788
38.228
  • Europa Universalis IV
  • Hearts of Iron III
  • Semper Fi
  • 500k Club
  • Europa Universalis III: Collection
  • Europa Universalis IV: Pre-order
  • Hearts of Iron II: Beta
  • Europa Universalis: Rome Collectors Edition
  • Mount & Blade: Warband
  • Paradox Order
  • Hearts of Iron IV Sign-up
  • Hearts of Iron IV: Together for Victory
errata: There is supposed to be a path from heavy fighters to jet fighters as well, but it seems to have fallen off at the moment.
 
  • 2
Reactions:

Wulf145

General
20 Badges
May 7, 2004
1.780
207
  • BATTLETECH
  • Hearts of Iron IV: La Resistance
  • BATTLETECH: Heavy Metal
  • BATTLETECH: Season pass
  • Hearts of Iron IV: Expansion Pass
  • BATTLETECH: Flashpoint
  • BATTLETECH - Digital Deluxe Edition
  • Hearts of Iron IV: Expansion Pass
  • Hearts of Iron IV: Death or Dishonor
  • Surviving Mars
  • Hearts of Iron Anthology
  • Hearts of Iron IV: Together for Victory
  • Hearts of Iron IV: Cadet
  • Hearts of Iron IV Sign-up
  • 500k Club
  • Semper Fi
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Hearts of Iron II: Armageddon
Questions:

Will we be able to research technology which will influence the 'starting levels' of a model i.e. I have researched 'Engine level 2' so my new Fighter will automaticaly start with a level 2 engine, or will you always start with the engine model 0 and have to spend experience to get it to level 2?

Will the experience be Air war experience or model specific i.e. I have 20 XP with the ME109, can this be used to upgrade the 'new' model FW190 or can I only use the XP for the ME109 Model?
 

gregor_mendel

Captain
69 Badges
Jan 4, 2008
301
97
  • Victoria 2: A House Divided
  • Naval War: Arctic Circle
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Wealth of Nations
  • Semper Fi
  • Victoria 2: Heart of Darkness
  • Crusader Kings II
  • Hearts of Iron IV: Cadet
  • Europa Universalis IV: Dharma
  • Crusader Kings II: Reapers Due
  • Stellaris: Apocalypse
  • Europa Universalis IV: Rights of Man
  • Europa Universalis IV: Golden Century
  • Europa Universalis IV: Rule Britannia
  • Crusader Kings II: Conclave
  • Battle for Bosporus
  • Stellaris: Leviathans Story Pack
  • Cities: Skylines - Natural Disasters
  • Hearts of Iron IV: Together for Victory
  • Crusader Kings II: Monks and Mystics
  • Crusader Kings III
  • Steel Division: Normandy 44
  • Cities: Skylines - Mass Transit
  • Europa Universalis IV: Mandate of Heaven
  • Hearts of Iron IV: La Resistance
  • Hearts of Iron IV: Death or Dishonor
  • Hearts of Iron IV: Expansion Pass
  • Cities: Skylines - Green Cities
  • Crusader Kings II: Horse Lords
  • Cities: Skylines Industries
  • Cities: Skylines - Campus
  • Stellaris: Distant Stars
  • Europa Universalis 4: Emperor
  • Europa Universalis IV
  • Crusader Kings II: Holy Fury
  • Cities: Skylines - Parklife
  • Hearts of Iron IV: Expansion Pass
  • Victoria 2
  • 500k Club
  • Steel Division: Normandy 44 -  Back to Hell
  • Europa Universalis IV: El Dorado
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Europa Universalis IV: Art of War
  • Europa Universalis IV: Res Publica
Great update. Really excited to see the direction this is going. Looking forward to the naval aspects next!

One question though on the Air Force... How do we transport them around? I might be in the minority here but I would love it if air units had an on-map counter that moved like any other ground unit. I disliked the ability to just move my air units around all willy nilly, even with the org hit upon rebasing.

Now that we can transport air units by carrier, this feature would make even more sense!