Blenheim Mk IV start up ?

[ATAG_Dutch]

Sorry, I should have given more detail!

Yes, Blackdog, I'm in the Cross Country mission (but ended up doing it in the Hurri!)

This is with full left trim already dialled in, and tapping the brakes just means I lose too much speed.

Should the boost lever be in the 'down for on' position for take-off?

Edit: Maybe the idea is to taxi to the other end of the runway and turn, so that the crosswind helps instead of hinders. Will try later!

[Buzpilot]

Running from airstart, I have to keep rpm at bottom, to avoid engine failures.
And rpm gauges only show min 1600, but it's almost like engine control think it's 2xRPM, assuming it's really below 1400 rpm in cruise.

From a; Approval of Fairchild Bolingbroke Mk IV T, i read that rpm at takeoff should be at 2650 rpm, and thats impossible, even after a airstart.

Edit; I managed to run engines at 2650rpm, after i warmed up 15 minutes, but engines warmed up beyond 235C too fast, Cowl flaps maxed for air cooling didn't help at all.
So normal takeoff at 2650 rpm is impossible. And engines should be able to run 100% power at 2750rpm continously without overheating, so something is bugged here.

2.2 Engines
Model: Bristol Mercury XX air-cooled nine cylinder single stage Supercharged
radial rated at 820 hp for sea level take-off at 2,650 rpm and 4.25 lbs in2 boost
pressure. Each engine is fitted with dual Watford SP9-6 magnetos, a single
booster coil, a Claudel Hobson AVT.85MB carburettor incorporating
automatic boost and mixture controls and a Rotax E160 electric starter and
hand crank.

Source: http://www.caa.co.uk/aandocs/21124/21124020000.pdf

[AARPRazorbacks]

The video helped alot.
Only thing is How do you get the throttles to work togather. After I start the engines with shift 1 and I, then shift 2 and I the throttles work independently and not together.

Thanks ,

flyer01

[mcler002]

i recalibrate the controls so you can toggle the engines 1 - "8", that way you can select and deselect them as you like... but i think there should be a key allocated to 'select all engines'...

Ross

[Blackdog_kt]

Originally Posted by mcler002

i recalibrate the controls so you can toggle the engines 1 - "8", that way you can select and deselect them as you like... but i think there should be a key allocated to 'select all engines'...

Ross

Correct, i mapped this to shift ~ , so that i can easily reselect everything after pressing shift F1, I, shift F2, I.

Originally Posted by Dutch_851

Sorry, I should have given more detail!

Yes, Blackdog, I'm in the Cross Country mission (but ended up doing it in the Hurri!)

This is with full left trim already dialled in, and tapping the brakes just means I lose too much speed.

Should the boost lever be in the 'down for on' position for take-off?

Edit: Maybe the idea is to taxi to the other end of the runway and turn, so that the crosswind helps instead of hinders. Will try later!

I find the Blenheim's engines a bit fragile at continued high boost settings, so i try not to use the extra boost. I'm having trouble with that mission too, but in other missions (for example, the one named phoney war that another user uploaded in this forum for us) i have no problem at all.

That being said, after i first managed to get the Blenheim airborne in the cross country mission i upped the ante and i'm trying to do it with four 250lb bombs loaded. I haven't managed that one yet, so i'm going to try out your idea and take off in the opposite direction.

[AARPRazorbacks]

Originally Posted by mcler002

i recalibrate the controls so you can toggle the engines 1 - "8", that way you can select and deselect them as you like... but i think there should be a key allocated to 'select all engines'...

Ross

Thanks for the help. After starting the engines in the normal shiff 1+I and shift 2+I I mapped to toggle engin 1 and it worked.

Now if I could just get off the ground.

Makes you wounder how many times did the real pilots crack-up before the got off the ground.?

Thanks again.

flyer01

[meplay]

I just made a mission using the same strip and it veers off to the right on that mission also, but doesnt do it on any other field :/

[ATAG_Dutch]

Originally Posted by meplay

I just made a mission using the same strip and it veers off to the right on that mission also, but doesnt do it on any other field :/

Maybe they built the field on the side of a hill?!

Me, I gave up and allowed the plane to turn into the wind and took off that way, just missing a couple of houses in the village down the hill.

Very hairy experience!

But it was to no avail, the starboard engine gave up the ghost after only a few miles.

Nor did I succed in a previous attempt to taxi to the other end of the runway and turn around.
The engines gave up before I could get there. This was after going to the shops and making a cup of tea whilst the engines warmed up, but they still hadn't got above 40 degrees oil temp and midpoint on the CHT.

I've also tried different throttle settings for each engine, different prop pitch for each engine, but nope, engine failures every time.

As an aside though, what is the necessity for carb heat?
I thought this was only used to prevent carb icing at altitude, or in very cold weather.

[JG53Frankyboy]

Originally Posted by AARPRazorbacks

Makes you wounder how many times did the real pilots crack-up before the got off the ground.?

do you realy belive the real Blenheim behaved like that in the actual CoD version ??

[meplay]

Ok i made it across the channel...but my problem is i cant keep my oil temp on the right engine above 40%, i take off with rads open and carbs open get into the air flying for a few mins, my CHT is at 218 and ive got prop pith about half way down to keep my rpm at 2200 everything seems fine but then the oil temp on my right side drops to below 40, i closed rads on that side to try and bring it back up then open again because my CHT is getting to 250. Then it starts to drop again so on the right engine i set the prop pitch a little higher to try and keep the oil temp up which it does for a little longer but it still comes down any1 else getting this prob with oil temp