Jump to content
Sign in to follow this  
Kalthios

Lagg-3 Tips, Guides, and Discussion

Recommended Posts

I searched for information on the Lagg-3 and came up without any dedicated threads so I am starting one.

 

LaGG-3 series 29​ Specifications (copied from Han's Specifications thread for your convenience)

 

Indicated stall speed in flight configuration: 163..189 km/h
Indicated stall speed in takeoff/landing configuration: 138..168 km/h
Dive speed limit: 750 km/h
Maximum load factor: 11 G
Stall angle of attack in flight configuration: 18 °
Stall angle of attack in landing configuration: 15 °

Maximum true air speed at sea level, engine mode - Nominal: 505 km/h
Maximum true air speed at 2000 m, engine mode - Nominal: 548 km/h
Maximum true air speed at 4000 m, engine mode - Nominal: 573 km/h

Service ceiling: 10500 m
Climb rate at sea level: 14.9 m/s
Climb rate at 3000 m: 13.3 m/s
Climb rate at 6000 m: 8 m/s

Maximum performance turn at sea level: 22.2 s, at 280 km/h IAS.
Maximum performance turn at 3000 m: 28.9 s, at 270 km/h IAS.

Flight endurance at 3000 m: 2.2 h, at 350 km/h IAS.

Takeoff speed: 165..200 km/h
Glideslope speed: 200..210 km/h
Landing speed: 140..160 km/h
Landing angle: 12.8 °

Note 1: the data provided is for international standard atmosphere (ISA).
Note 2: flight performance ranges are given for possible aircraft mass ranges.
Note 3: maximum speeds, climb rates and turn times are given for standard aircraft mass.
Note 4: climb rates and turn times are given for Nominal power.

Engine:
Model: M-105PF
Maximum power in Nominal mode at sea level: 1200 HP
Maximum power in Nominal mode at 800 m: 1260 HP
Maximum power in Nominal mode at 2700 m: 1200 HP

Engine modes:
Nominal (unlimited time): 2700 RPM, 1050 mm Hg

Water rated temperature in engine output: 70..85 °C
Water maximum temperature in engine output: 100 °C
Oil rated temperature in engine output: 90..100 °C
Oil maximum temperature in engine output: 115 °C

Supercharger gear shift altitude: 2500 m

Empty weight: 2620 kg
Minimum weight (no ammo, 10% fuel): 2773 kg
Standard weight: 3157 kg
Maximum takeoff weight: 3701 kg
Fuel load: 348 kg / 467 l
Useful load: 1081 kg

Forward-firing armament:
20mm gun "SsVAK", 160 rounds, 800 rounds per minute, nose-mounted
12.7mm machine gun "UB", 200 rounds, 1000 rounds per minute, synchronized
23mm gun "VYa-23", 90 rounds, 600 rounds per minute, nose-mounted (modification)
37mm gun "Sh-37", 20 rounds, 185 rounds per minute, nose-mounted (modification)

Bombs:
2 x 50 kg general purpose bombs "FAB-50sv"
2 x 104 kg general purpose bombs "FAB-100M"

Rockets:
6 x 7 kg rockets "ROS-82", HE payload mass 2.52 kg

Length: 8.84 m
Wingspan: 9.8 m
Wing surface: 17.51 m^2

Combat debut: May 1942

Additional airplane configurations list:
Spoiler


VYa-23 23mm motor-gun with 90 rounds
Additional mass: 35 kg
Ammunition mass: 45 kg
Gun mass: 66 kg
Estimated speed loss: 0 km/h

Sh-37 37mm motor-gun with 20 rounds
Additional mass: 106 kg
Ammunition mass: 25 kg
Gun mass: 169 kg
Estimated speed loss: 2 km/h

2 x 50 kg General Purpose Bombs FAB-50sv
Additional mass: 120 kg
Ammunition mass: 100 kg
Racks mass: 20 kg
Estimated speed loss before drop: 20 km/h
Estimated speed loss after drop: 12 km/h

2 x 104 kg General Purpose Bombs FAB-100M
Additional mass: 228 kg
Ammunition mass: 208 kg
Racks mass: 20 kg
Estimated speed loss before drop: 27 km/h
Estimated speed loss after drop: 12 km/h

6 x 82mm High Explosive unguided rockets ROS-82
Additional mass: 60 kg
Ammunition mass: 42 kg
Racks mass: 18 kg
Estimated speed loss before launch: 23 km/h
Estimated speed loss after launch: 17 km/h




Operation features:
- Engine has a two-stage mechanical supercharger which must be manually switched at 2500m altitude.
- Engine mixture control is manual, it is necessary to lean the mixture if altitude is more than 3-4 km for optimal engine operation. Also, leaning the mixture allows a reduction in fuel consumption during flight.
- Engine RPM has an automatic governor and it is maintained at the required RPM corresponding to the governor control lever position. The governor automatically controls the propeller pitch to maintain the required RPM.
- Water and oil radiator shutters is manually controlled.
- Airplane has trimmers for all flight-controls: pitch, roll, yaw.
- Landing flaps have a hydraulic actuator and they can be extended to any angle up to 60°.
- Airplane tail wheel rotates freely and does not have a lock. For this reason, it is necessary to confidently and accurately operate the rudder pedals during the takeoff and landing.
- Airplane has differential pneumatic wheel brakes with shared control lever. This means that if the brake lever is held and the rudder pedal the opposite wheel brake is gradually released causing the plane to swing to one side or the other.
- Airplane has a fuel gauge which shows total remaining fuel.
- Cockpit canopy has a weak lock when in the opened position, for this reason the canopy may spontaneously close in a deep dive. Also, it is impossible to open or close canopy at high speed due to strong airflow. The canopy has no emergency release, so bail out requires the speed drop before it.
- The control system of wing-mounted bomb racks only allows the dropping of bombs one by one.
- When rockets are installed a salvo controller is used, it has three launch modes: single fire, fire two in a salvo or fire four in a salvo.

 

 

So far I like the roll rate, its elevator, and having trim controls for yaw, pitch, and roll. Its also nice that the instruments aren't blocked by the gun sight, though they could be larger and a bit higher on the dash. It looks very aerodynamic to me and perhaps with its additional weight can accelerate faster in a dive and decelerate slower after leveling-off than the other light fighters, but I am not sure if that is the case.

Share this post


Link to post
Share on other sites

It's heavier and climbs slower, but has heavier armament options, which I like. Also it has a better fuel gauge, which is handy.

Share this post


Link to post
Share on other sites

So far I've found the best way to evade a 109 diving on me is to go into a descent and try to get the speed up over 550 kph. At high speeds the 109 F-4 can't turn as hard as the Lagg-3. I do some hard turns and try to get it to overshoot, then pull back onto its tail and shoot it down before it gets out of range. If I miss the shot it seems to be best to just stay low, just over the tree tops.

Share this post


Link to post
Share on other sites

 

 

Is there any tutorial on proper use of gun site?

 

https://www.twitch.tv/firambo97

 

:P

 

It rolls really nicely and has a nice knack of righting itself perfectly for a shot or two after the belligerent passes by... :salute:

Share this post


Link to post
Share on other sites

 

 

I hope you have put that photo on your profile in support of the pilot.

 

yes i put the link to the tweet where i got it from in my status....wherever that is. The pilot is dead afaik.....and a hero :(

 

FI=Rambo streams...almost always flies the Lagg-3.....and is very good with it. You couldn't ask for a better tutorial than watch him or his vids (he is still getting used to his rudder pedals but seems to have it under control).

Share this post


Link to post
Share on other sites

I will change it if someone suggests a good reason why i should.

 

It is a sad story that people should know and people here might be interested in. :salute:

Share this post


Link to post
Share on other sites

The LaGG is surprisingly pleasant to fly, contrary to historical reports of it being a flying coffin. The main thing you need is care and patience. If you burn your energy you basically have no way to get it back in a combat timescale, but if you come in with some and fight with a decent speed (and get out before you lose it) it's very effective.

Share this post


Link to post
Share on other sites

The LaGG is surprisingly pleasant to fly, contrary to historical reports of it being a flying coffin. The main thing you need is care and patience. If you burn your energy you basically have no way to get it back in a combat timescale, but if you come in with some and fight with a decent speed (and get out before you lose it) it's very effective.

 

Am sure if we had the earlier and heavier 105-P and PA powered versions it would have a much harder time even against its contemporaries especially when combined with problems an early batch that had very poor/rushed production quality issues at critical and difficult situation around BoM campaign.

 

There is interesting back story with the rivalry with Yakovlev and many dirty tricks when he became Deputy of Air ministry and promoted his own designs above others

 

But the Lagg-3 airframe design slowly morphed into very successful La-5 without many serious changes (notwithstanding engine) to the basic design, until late 44 improvements to wing and spar, morphing into the La-7 which still had a lot of Lagg-3 DNA in it

 

post-6177-0-91189900-1517745044_thumb.jpg

 

Last of the Lagg-3's were quite nice looking A/C although still lacking when compared to contemporary performance

 

As far as tactics go it always will be slightly behind, although a good bomber killer with the 37mm as used at Stalingrad with Yak fighter escort

 

Cheers Dakpilot

  • Upvote 1

Share this post


Link to post
Share on other sites

Am sure if we had the earlier and heavier 105-P and PA powered versions it would have a much harder time

 

I thought we still have a fairly early type, Series 26, and they only got good (relatively speaking) with the series 66.

 

Last of the Lagg-3's were quite nice looking A/C

 

Nah, razorback and chin radiator look much better :P I actually really like the LaGG-3 from a looks point of view.

Share this post


Link to post
Share on other sites

We have the 29th series, June 42 the first with M-105PF engine and including all airframe improvements of 23rd series, later 29th series had improved Prop as fitted to 33rd series

 

Yep the 66th was the best (and last, May-Sept43) but among contemporary designs it was not really a first line fighter, by then it was only produced in Georgia and featured more in Caucuses/Black Sea front

up until May 44 until transfer to Karelian Front +- June 44

 

Cheers, Dakpilot

Share this post


Link to post
Share on other sites

I was in a head on with a 109 F-4 and one of its bullets bounced right off the front glass. Nothing else hit my plane, felt like I had a shield.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×
×
  • Create New...