Bug 174 on 12lbs boost. Review please.

[IvanK]

Originally Posted by Osprey

Just had a speed test in the Rotol Hurricane. Couldn't get more than 230mph ASi out of it, trimmed, level flight, at various RPm (best 2650). According to this:

http://www.wwiiaircraftperformance.o...rricane-I.html

I should get 261mph with the Rotol which is 290mph TAS.

261 IAS converting to 291TAS is a huge difference at sea level. 30 Mph diff is not feasible.

[Osprey]

Apologies IvanK, I missed you off the list to review my OP, please advise anything you think is incorrect.

Regarding your comment though, what do you mean by 'not feasible' in this context? You mean it just shouldn't happen because it is a lot? Trouble is it is actually worse than just 30mph because this is WITHOUT 12lbs boost, so you can add another 25mph to that figure. Essentially the Hurricane is 50-60mph too slow. When I looked at the graphs too the 109 is faster than RL up to 6km too, so we have an inaccuracy of around 80mph!!

[IvanK]

No probs. Regarding the comment on speeds I am only referring to getting 291MPH TAS from an IAS of 261MPH. At Sea Level IAS is going to be pretty close to TAS +- a nanofart.

I agree just about every RAF fighter is too slow in the patch at sea level.

(Check PM in about 10 mins)

[Kurfürst]

Originally Posted by Osprey

When I looked at the graphs too the 109 is faster than RL up to 6km too, so we have an inaccuracy of around 80mph!!

On the graphs posted by BlackSix the 109 is actually a hair bit slower than real life specs.

[Osprey]

Not with WEP on it isn't.

[CaptainDoggles]

Spitfire 1a is faster than 109 with or without WEP above 6000m after the patch.

What exactly is the problem?

To my understanding the 109 is definitely very much slower than RL at altitudes above 5500m, at 7000m by 30-40 kph. That is a huge discrepancy. As far as I can read kyrillic letters (I am learning Russian a little bit) the blue curve shows RLE values (so flight tests by the British), the purple one says something like "igra forsash" (= game XYZ?) and the grey "igra bez forsasha" (= game ....?)

My guess is that the purple line is post patch the grey pre patch. the purple line is following the grey line (just beneath it) from alt 5200m.

[CaptainDoggles]

Purple line is with WEP. Форсаж (Forsazh) translates roughly to "boost". Без Форсаж (Bez forsazh) translates to "without boost" therefore grey line is without WEP.

[Kwiatek]

I checked 109 sea level speeds and nothing change comparing to pre beta patch version.

So i think there is no changes in FM of 109 ( also there is no info about it in beta patch notes). So still 109 is to slow ab. 20 km/h at 1.3 Ata power and ab. 20 km/h at 1.4 Ata - so generally 40 km/h slowier at the deck.

Moreover i checked british fighters in beta patch and i got:

Hurricane MK 1 Rotol

238 mph /383 kph at the deck at +6 1/2 boost ------ should be 262-265 mph /420-426 kph !!!!

So it is 24-27mph/ 38-43 kph too slow at + 6 1/2 boost power !!!!

There is no WEP - so no 100 octan fuel performacne - which should give ab. 25 mph/ 40 kph extra speed at low alts

Spitfire MK1a

255 mph at the deck at 6 1/2 boost ---------should be 283 mph !!!!

So it is 28 mph/45 kph too slow at 6 1/2 boost.

No 100 Octan fuel performance at all - boost cut out doesnt rise power at all.

Spitfire MK II

268 mph at deck at 6 1/2 lbs
285 mph at deck at 9 lbs ------ should be 286-290 mph so it is very accurate result!!!!

Still no 100 octan fuel performance - so no emergency +12 lbs.