-
There seems to be an uptick in Political comments in recent months. Those of us who are long time members of the site know that Political and Religious content has been banned for years. Nothing has changed. Please leave all political and religious comments out of the forums.
If you recently joined the forums you were not presented with this restriction in the terms of service. This was due to a conversion error when we went from vBulletin to Xenforo. We have updated our terms of service to reflect these corrections.
Please note any post refering to a politician will be considered political even if it is intended to be humor. Our experience is these topics have a way of dividing the forums and causing deep resentment among members. It is a poison to the community. We appreciate compliance with the rules.
The Staff of SOH
-
Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
Turbine Duke Out Now
- Thread starter wallyboard
- Start date
I had the same issue Kiwikat. I decided to try starting it with the RPM levers down near feather and they started fine. I think the manual says to put them at 100% but not sure that's correct. Or I did something else wrong.
Having said that, OUTSTANDING model. And yeah, this thread needs a sticky.
ryanbatc
Charter Member
Hmmm I have my parking brake set, and I do get a bit of surge but not drastic like you guys are getting...
It may be an issue with the throttle because in the past my CH throttle has given me issues similar to what you describe in other planes.
Have you tried unplugging your controller (just for test purposes) and see if the problem happens without it?
edit: Oh also, this may be redundant, but check your realism settings against what they describe in the manual.
It may be an issue with the throttle because in the past my CH throttle has given me issues similar to what you describe in other planes.
Have you tried unplugging your controller (just for test purposes) and see if the problem happens without it?
edit: Oh also, this may be redundant, but check your realism settings against what they describe in the manual.
skyhawka4m
Charter Member
No issues here at all...she's awesome and a great plane to fly.,
robrealair
Members +
If you get odd behaviour on start up please try the following:
* Check that your throttle control is calibrated so that zero throttle really is zero (hover the mouse on the throttle with tool-tips enabled and it will readout the current percentage.
* Follow the start up procedure per the manual which is:
1. Prop levers full forward. Condition levers FULLY back. Parking brakes set. Throttle zero.
2. Press start switch, wait till Ng% is 12% or above then push the condition lever forward to LOW idle, no further.
3. Wait for prop rpm to settle.
4. Start next engine.
You can do the whole thing pressing the standard CTR E. In fact there will be little forward movement if you start either way even without brakes on, provided the condition levers are not pushed beyond LOW idle.
Hope this helps.
Rob - RealAir Simulations
* Check that your throttle control is calibrated so that zero throttle really is zero (hover the mouse on the throttle with tool-tips enabled and it will readout the current percentage.
* Follow the start up procedure per the manual which is:
1. Prop levers full forward. Condition levers FULLY back. Parking brakes set. Throttle zero.
2. Press start switch, wait till Ng% is 12% or above then push the condition lever forward to LOW idle, no further.
3. Wait for prop rpm to settle.
4. Start next engine.
You can do the whole thing pressing the standard CTR E. In fact there will be little forward movement if you start either way even without brakes on, provided the condition levers are not pushed beyond LOW idle.
Hope this helps.
Rob - RealAir Simulations
Kiwikat,
Could you be hot starting? Be sure the condition levers (Mixture to any piston types) are all the way back, ignition on, then the starter. When Ng goes to at least 12%, then bring the condition lever to low idle. That lights the fire. The new manual describes the process but doesn't explain (at least in the checklists) what a hot start is. I understand it, but can't explain it very well. Hopefully, there is a real PT-6A pilot here that can.
Glenn
Could you be hot starting? Be sure the condition levers (Mixture to any piston types) are all the way back, ignition on, then the starter. When Ng goes to at least 12%, then bring the condition lever to low idle. That lights the fire. The new manual describes the process but doesn't explain (at least in the checklists) what a hot start is. I understand it, but can't explain it very well. Hopefully, there is a real PT-6A pilot here that can.
Glenn
pbearsailor
SOH-CM-2025
Hot starts are pretty rare on PT-6A's, but what you want to watch during the start sequence is temperature after you move the condition levers out of cutoff at 12% to light the fire. If you go beyond temp limits on the start, you'd just move the condition lever back to idle cutoff and abort the start.
The 12% figure that it stabilizes at is an FSX glitch. Real world, you'd never attempt a start with that low an N1 number and you'd always see something more like 20% unless you really had a flat battery. 12% real world would give you a hot start, but all the turboprops I've seen in FSX have it the same way, so I'm sure Rob couldn't do anything about it in his flight model.
One other thing that works well on the surge at startup is to start with the props in feather. Some real PT-6's normally start this way, Piper Cheyenne if I remember correctly, but I've done it many times in various PT-6 types. It's a good way to keep from blowing something behind you away when you start.
I've only flown the Realair version an hour or so, but I think Rob has done a great job with the turboprop modeling. Power lever response seems very close and to me it's about the best start sequence I've seen in FSX. It's a pretty cool airplane.
Real world wise, I was once flying for a company that operated King Air 90's and they acquired a company that had a Duke. Really pretty airplane, but all of us pilots were glad they didn't keep it as it was the piston version with those complicated geared engines. We liked our PT-6's. I'll bet the real world turbine Duke is quite an airplane. Only thing that strikes me on the specs is that fuel capacity is pretty low, so it doesn't have a lot of range. Quick bugger, though.
cheers,
steve
robrealair
Members +
Hi Steve,
Yes you are right. FSX is hard coded not to get much beyond 13% Ng before you have to light the engines. I tried as much as possible to push this up to 15% and beyond, but FSX will not achieve this.
As you guessed, there are many hard coded turboprop parameters in FSX which defeat the most determined attempts to overcome them, but we worked very hard to get as much realism as possible in the start sequence, and general Ng/prop handling.
All the FSX turboprop flaws, and our dealing with them, are explained in the Duke's Flying Guide pdf file.
All the best,
Rob - RealAir
Yes you are right. FSX is hard coded not to get much beyond 13% Ng before you have to light the engines. I tried as much as possible to push this up to 15% and beyond, but FSX will not achieve this.
As you guessed, there are many hard coded turboprop parameters in FSX which defeat the most determined attempts to overcome them, but we worked very hard to get as much realism as possible in the start sequence, and general Ng/prop handling.
All the FSX turboprop flaws, and our dealing with them, are explained in the Duke's Flying Guide pdf file.
All the best,
Rob - RealAir
The problem of turbo props in FSX on start up surging and spinning around or racing across the airfield are well known and discussed and believed a known issue with the limits of modelling these engines in FS, as noted in this thread. Less likely to be your controller or realism settings.
The frequent cure is as quoted above, i.e. feather your props before start, and when ready to taxi ease them forward carefully. Familiar with the apparently accurate "hot start" procedures and failure modes modelled on the Aeroworx Super King Air for FS9. If you do hot start an engine the repair bill can be $150,000, which concentrates the mind . .
Anyone get near 300 knots and 4,000 fpm climb on this?
real deal
just in case anyone is interested in the real life Turbo Duke have a look at Rocket Engineering at Felts Field in Spokane Wa
<CITE>www.[B]rocketengineering[/B].com</CITE>
just in case anyone is interested in the real life Turbo Duke have a look at Rocket Engineering at Felts Field in Spokane Wa
<CITE>www.[B]rocketengineering[/B].com</CITE>
ryanbatc
Charter Member
Yep, initial climb with 75% fuel and cold temps... maybe -10C. 4000 fpm at about 130-140kts.
Did 299 kts TAS at FL 250.
Hi Rob,
I have all settings as listed in the manual, BUT, haven't recalibrated my throttle yet. I'll check that. I only had time for one quick flight then off to work so I haven't had much time with it. In either case, it works great starting them feathered in case I don't get the issue straightened out on my computer.
An outstanding model in every respect. Real Air has done it again!!!!!
