Take Off Performance Charts

[Opalias]

I'm trying to figure out the max take off weight for a dry take off. I've been experimenting but can seem to climb out without afterburner under most circumstances.

[MYSE1234]

If I'm reading the charts correctly, MTOW without AB should be around 15500kg at ISA and ISA+10. At ISA -15 and ISA-30 it's around 16000kg.

A fully fueled jet weighs about 15235kg, a fully fueled one with a tank is 16430kg.

 

Either that's the MTOW, or they just didn't bother calculating higher weights.

 

Source: AJ37 SFI Del3

Edited August 27, 2020 by MYSE1234

[Holton181]

If I'm reading the charts correctly, MTOW should be around 15500kg at ISA and ISA+10. At ISA -15 and ISA-30 it's around 16000kg.

A fully fueled jet weighs about 15235kg, a fully fueled one with a tank is 16430kg.

 

Either that's the MTOW, or they just didn't bother calculating higher weights.

 

Source: AJ37 SFI Del3

 

My interpretation of the charts are an MTOW close to 18500kg since that's the common higher limit for max zon 2/3 and since MTOW is a structural limit not really related to power output. The 15500/16000 limit for max släkt (max with no afterburner) I would guess only being procedural, taking too long (both time and space) to reach M0.55, and maybe demanding too long runways (I have a feeling they had some demands to be able to take off from runways down to a certain length, taking things like the road bases in consideration and all). So, if my interpretation (=guesswork) is correct, nothing really stops you from taking off with >15500kg and max släkt, unless too short runway.

It's interesting that max zon 1 isn't included in the charts though.

[Opalias]

I've had a lot of trouble getting over the 300-400kph hump climbing out at mil power even with what I consider to be a relatively like load (no center tank and rb75x4) Once the plane gets to 400-450kph and the AOA gets knocked down life is good, but even at sea level it's just felt anemic while trying to climb out.