Fulqrum Publishing Home   |   Register   |   Today Posts   |   Members   |   UserCP   |   Calendar   |   Search   |   FAQ

Go Back   Official Fulqrum Publishing forum > Fulqrum Publishing > IL-2 Sturmovik: Cliffs of Dover > Technical threads > FM/DM threads

FM/DM threads Everything about FM/DM in CoD

Reply
 
Thread Tools Display Modes
  #1  
Old 06-16-2011, 02:58 PM
Crumpp's Avatar
Crumpp Crumpp is offline
Approved Member
 
Join Date: Feb 2008
Posts: 1,552
Default

Quote:
the 12 lbs were useful without the damaging of engine
Geez....

You people are still debating this? Where is the common sense?

Reply With Quote
  #2  
Old 06-16-2011, 11:36 PM
TomcatViP TomcatViP is offline
Approved Member
 
Join Date: Aug 2010
Posts: 1,323
Default

Quote:
Originally Posted by Crumpp View Post
Geez....

You people are still debating this? Where is the common sense?

There is too much things that does not match
Reply With Quote
  #3  
Old 06-17-2011, 12:39 AM
Blackdog_kt Blackdog_kt is offline
Approved Member
 
Join Date: Jan 2008
Posts: 2,715
Default

Quote:
Originally Posted by *Buzzsaw* View Post
Salute

but as you say, only in the outside wing tanks, and only for takeoff.
Not really, what i said was indeed "only in outboard tanks" but it is far from saying "only for takeoff": unless they were planning a one-way trip they would have to burn that 100 octane on the return leg of the sortie as it was the only supply available to them after the inboard tanks had gone dry

What i previously described amounts to "on takeoff and half of the cruise portion of the flight", which is half the fuel burn for the sortie.

In other words, quite a lot of 100 octane fuel in case of long range sorties and as low as none at all in short range sorties (unless they were bending the rules and carrying a few minutes worth of it to get better WEP boost values in case of trouble, but that would be a negligible amount).

In conclusion, if the Blenheims generated enough sorties at long ranges or were routinely tasked with loitering around a certain area on patrol duty (eg, U-boats, reconnaissance, etc), they could account for quite a lot of 100 octane use. If on the other hand they were mostly flying cross-Channel hops in nuisance raids, they would mostly burn 87 octane.

Until someone can produce a relevant document that deals with the amount, type and range/duration of their sorties during the BoB the argument can swing either way
Reply With Quote
  #4  
Old 06-17-2011, 04:18 AM
Kurfürst Kurfürst is offline
Approved Member
 
Join Date: Oct 2007
Posts: 705
Default

This might prove relevant:


"the Bomber Stations concerned was practically complete (these Stations are Wyton Watton, Wattisham, West Rayham)"

http://www.ww2aircraft.net/forum/att...ng-minute-.jpg

Quite clearly only four Bomber/Blenheim bases were 'concerned' with 100 octane fuel. If those four stations held all Blenheim Squadrons, your claim may be true, but somehow I doubt it.

Wyton had two Blenheim Squadrons at the time: Nos. 15 and 40
"In December 1939, both Wyton squadrons were sent to France and Nos. 15 and 40 Squadrons returned from the Continent to Wyton, the first step in converting Battle squadrons to Blenheims. Both squadrons flew their first bombing raids from Wyton on May 10, 1940 against targets in the Low Countries. The Blenheims of No. 57 Squadron were based briefly at Wyton in June before going south, returning for two weeks the following month before flying north only to appear again at Wyton in late October. "

Wattisham had also two, Nos. 107 and 110 Squadrons http://www.raf.mod.uk/bombercommand/s30.html
http://www.raf.mod.uk/bombercommand/s106.html

Watton also had two Blenheim Squadrons: Nos.21 and 82 Squadrons
http://www.raf.mod.uk/bombercommand/s31.html

West Rayham had only one Blenheim Squadron, No. 139, and possibly from June 1940 also no. 18 also operating.

That's 7 or more like 8 Blenheim Squadrons on 100 octane. At that time there were 15 Bomber Command Sqns. operating Blenheim IVs. But this pretty much explains where 100 octane fuel went in such quantities - even those 8 Blenheim Squadrons were consuming a lot. Total tankage was 468 imp. gallons compared to 85 gallons on the Spit - a worth of about 45 Fighter Squadrons..
__________________
Il-2Bugtracker: Feature #200: Missing 100 octane subtypes of Bf 109E and Bf 110C http://www.il2bugtracker.com/issues/200
Il-2Bugtracker: Bug #415: Spitfire Mk I, Ia, and Mk II: Stability and Control http://www.il2bugtracker.com/issues/415

Kurfürst - Your resource site on Bf 109 performance! http://kurfurst.org
Reply With Quote
  #5  
Old 06-17-2011, 06:16 AM
Seadog Seadog is offline
Approved Member
 
Join Date: Jun 2011
Posts: 226
Default

Quote:
Originally Posted by Kurfürst View Post
But this pretty much explains where 100 octane fuel went in such quantities - even those 8 Blenheim Squadrons were consuming a lot. Total tankage was 468 imp. gallons compared to 85 gallons on the Spit - a worth of about 45 Fighter Squadrons..
No.
468 gallons is with no bomb load
Total internal fuel capacity was 280 imperial gallons, or less, when used as a bomber. Normal TO weight = 13500 lb and 14300lb max.

Empty weight = 9790 lbs
Bombs = 1000lb
crew = 600 lbs
oil = 200lb (28 gallons)
fuel = 280 gals = 2016lb (468 gallons = 3370lb and 15300lb TO weight with 1000lb bomb load)
------------------------
= 13886lbs, when normal max was 13,500lbs and overload = 14,400lb

13500lb = ~230 gallons with a 1000lb bomb load.

Most BofB Blenheim missions were tactical strikes into France or as fighters where even 230 gallons was far more than was required.
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:30 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright © 2007 Fulqrum Publishing. All rights reserved.