How do you taxi properly when turning? For example in the Cessna Longitude when moving slowly the aircraft stops and you have to apply quite a lot of thrust to get moving.
I’ve tried going faster but this causes the aircraft to not turn as tight and you end up on the grass.
It would be good if the aircraft keeps moving when slow but I constantly have to apply thrust to get going again.
Any suggestions?
Sounds like you pretty well figured it out! Taxi is done slow - especially around the apron … about walking pace. Only a little faster on taxiways. And yes - you will need to add power (sometimes quite a bit) to keep the plane moving. Jet engines take some time to spool up to deliver the extra thrust and you have to anticipate that too.
Way back in the day when I was learning, my instructor would scold me for running the engine too slow (risk ‘oiling the plugs’), then taxiing too fast, then riding the brakes. Took a while before I got the hang of it 
and that was just in a very simple Piper Tomahawk! Taxiing is quite an art!
Taxi slow and use differential braking to help with turns. I have the left and right brakes assigned to different buttons on my stick, and it helps a lot.
I don’t currently have rudder pedals (waiting to get a good set) but the buttons work fine.
That’s good to know it’s normal behaviour and realistic. I was beginning to think this was another bug in the sim. I actually find the A320NX quite easy to taxi compared to some of the props. It coasts quite well without keep having to apply thrust. Yes I agree it’s quite an art to get right and takes practice.
I really struggle with taxiing and I have pedals.
Sometimes it kind of works (slowly) and at other times it won’t turn at all.
(Citation - Xbox)
The thing to be aware of, is that pretty much everything you do in an aircraft will take significant time for your inputs to actually translate into how the aircraft is handling.
It is normal to have to give significant throttle just to get an aircraft rolling, but if you hold that amount of throttle until the aircraft is rolling – and certainly after that point – you will end up going way too fast.
When you turn the wheels significantly, that creates resistance which will slow – or prevent - the aircraft from rolling. So it will take a little throttle to compensate for that.
When it is time to turn, if you need to slow the aircraft to navigate the turn, the proper way to do that would be to do it before the turn.
This actually applies to performance driving of a car too. Going into a turn too fast, and braking while turning, puts a lot of forces on the tires. It turns out, when you are driving a car at its absolute limits, you’d find that braking prior to the turn will get you a lower time (and cost less in terms of tire wear).
In an aircraft, the same principles apply, but also you have to consider that if the brakes were to fail it shouldn’t result in an excursion.
In general, it is not desirable to have throttle and brakes in use simultaneously and against one another. Your brakes will run hot and you will burn more fuel than is needed.
Coming out of a taxi turn is also a lot like performance driving. Once you get about 3/4 through the turn, you will want to lay down a little throttle so that you exit the turn at the proper taxi speed and not roll to a stop. After all, you have a timeline to manage and a responsibility to not hold up the airfield traffic. LOL.
Having the front tires turned does present a lot of resistance to the aircraft forward rolling, and the way it is done in this sim is actually fairy realistic.
The more you use an aircraft the easier it gets. I actually find the larger aircraft easier to control until you get to the heavies with the nose wheel directly beneath you and main gear 50+ feet behind you.
Try a tail dragger! I had a hard time with them until I learned the tail wheel is free when you push forward on the stick and locked when you pull back.
Keep in mind grade of the tarmac and wind too. The wind effect is minimized at slow speeds but still there - I got pushed clear across a lake when trying to taxi on floats in northern Russia.
Remember, differential braking is your friend. That’s especially easy if you have pedals. You can almost spin any plane around in circle on the spot using it.
Differential braking is only used on larger aircraft like the Longitude and bigger when it’s absolutely necessary and you need to achieve the absolute minimum turning radius.
e.g. a 180° turn on the runway.
@TearlessFiend27
IRL on a straight taxiway the speed is 20-30kts
Normal turns at 10kts
Tight turns at 5kts
Just checked and it works nicely with e.g. the Longitude.
Looks like Asobo has changed the thrust and/or drag values with SU5.
Can’t remember that the Longitude did slow down so rapidly at idle thrust.
Most jets tend to accelerate at idle.
With the default load I need ~40% N1 (which isn’t very much) to get the Longitude to move and ~30% to keep the taxi speed (which doesn’t seem to be correct)
For a tight turn (~5kts) add ~5% N1 and the Longitude will turn very tight and not slow down 
Yes, i find I need it on the 787 and the like. The smaller planes are fairly easy to maneuver.
The MSFS 787 needs to slow down to 2-3kts to be able to turn very tight (without differential braking) and with an aft CG she doesn’t turn at all.
Still considerable work required on this ‘premium deluxe’ aircraft.
But this isn’t real life. IRL you’re actually able to steer these planes properly on the ground. In the sim you can’t. Their turning radius is awful.
Can’t confirm the turning radius problem.
The 787 needs a slightly too low speed to turn very tight and the Longitude turns quite realistic.
The super annoying max deflection problem seems to be fixed since SU5,
at least on these two aircraft.
It’s normal to apply breakaway power (that’s what it is called when “you have to apply quite a lot of thrust to get moving” as you stated. While taxiing, one should go at a jogging speed. Make that an an Olympic jogger pace if in a hurry. For turns, a much slower speed is needed as in 2-3 knots (walking speed).
I don’t know where you’ve got these numbers from. Jogging speed is only ~4kts.
These are the taxi speeds which are commonly used on Citation sized and bigger jets.
Straight 20-30kts
Normal turns 10kts
Tight turns 5kts
These are working nicely on the MSFS Longitude as well.
15 knots is a good speed going straight ahead. Jogging speed might be a little slow as you said, but 30 knots is quite fast. I have flown multiple Citations and larger jets and we never go 30 knots in a straight line. 15-20 max and 20 is pushing it. 30 knots while taxiing sounds like a late airliner.
20-30kts are the speeds which are being mentioned in basically all Boeing FCTMs
(to avoid heating up the brakes too much).
Same for Embraer 30 kts going straight, 10 kts in turns. In case of wet or contaminated taxiways 10 kts straight, 5 kts in turns.
I haven’t flown the Longitude in some time now (since SU3), so my opinion of its turning performance may be outdated. It was a complete ■■■■■ to get to steer a couple of months back without using differential braking.
The CJ4 (with the WT mod), which I have been flying a lot, handles great on the ground as long as you keep speeds in check much along the lines of what you listed. I never have to use brakes to turn on that plane.
SU5 has significantly improved taxiing behavior on (at least) a few aircraft.