May 16, 2004 at 11:50 pm
I have a question about the GM-1 nitrous-oxide system that could be fitted to the Bf-110.
How much did this system increase performance?
I’ve often heard how it helped the performance of the Fw-190 and the Bf-109, but not the Bf-110.
Can anyone help?
By: trumper - 22nd May 2004 at 10:48
Trumper,
That is probably true, but since this is a HISTORICAL aviation forum shouldn’t we still discuss planes that aren’t currently flying?Perhaps luck will have it that a -110 could be made flyable someday.
š I agree 100%,i was really just stating that some information is going to be easier to find than others,as for a 110 flying would’nt that be nice to see,i wondered if the are any in the pipeline,maybe from Russia,if they could’nt find 2 x db engines what could be used instead?
By: PhantomII - 21st May 2004 at 22:29
Thanks for the info.
By the way I know that the R3 subvariant (i.e. the one fitted with the GM-1 system) had the rear gunner, MG 81Z twin-gun, and rear cockpit armor & seat removed to fit the system. The nose armament was still fitted. The only time any type of nose armament was removed was when the -110 was fitted with the Bk 3.7 gun in place of the two 20-mm cannons.
By: TempestNut - 21st May 2004 at 22:07
PhantomII I’m not an expert on the 110 but it seems that there was a R3 GM1 modification for the 110G. This involved removal of the nose armament to save weight. This may have been for a high altitude reconnaissance platform. There was a R6 mod as above but with 2 MG151 cannon fitted in a ventral tray as well. Photograph evidence Nil.
Certainly GM1 would not have been fitted to the Night fighter as it was overweight as it was. The DB605AS engine would have required the modification of the cowling as on the 109 and I have not seen this either. Whilst I can find no reference to MW50 being fitted it would have been of the most use to 110 in a ground attack role, and to say it was not fitted would invite correction. Almost anything and everything happened in the Luftwaffe in the last 12 months of the war, so keep asking around and someone may have the information.
By: PhantomII - 21st May 2004 at 20:05
Thanks for the info TempestNut. That helps explain to me why some variants of the Bf-109G had a boost and others didn’t.
Just so I make sure i understand you correctly the Bf-110 never had any engine type that could boost the available power for a short period of time like the -109 and -190 did?
Trumper,
That is probably true, but since this is a HISTORICAL aviation forum shouldn’t we still discuss planes that aren’t currently flying?
Perhaps luck will have it that a -110 could be made flyable someday.
By: trumper - 20th May 2004 at 09:28
š Not many DB engines left running and certainly not in any 110’s flying but there are still P51’s and Spitfires flying and many people on here have varying degrees of access and information on them.
By: TempestNut - 19th May 2004 at 22:50
Just to prove that you can get info on this board,not not all of us are just interested what colour an aircraft was š š š here is some more information that I have been able to collate over the last few years.
Basically I think evidence points to GM1 NOX injection being used on the DB601 in the Me109F and in some early DB605’s in 109G’s. As I mentioned it was to raise the rated altitude of the engine. MW50 was what we call ADI or anti detonation injection. This raised power below the rated altitude of the engine and had little no effect above this altitude due to a lack of oxygen.
On the 605 a new supercharger was designed and this raised the rated altitude of the engine and negated the need for GM1. These engines were called DB605 AS. As a consequence MW50 could be used at a higher altitude and such engines would be called DB605 ASM
DB605A 1475hp takeoff power, 1355 @ 18,700 feet
DB605AM 1800hp takeoff power, 1700 @ 13,500 feet 1355 @ 18,700
DB605AS 1475hp takeoff power, 1200 @ 26,000 feet
DB605ASM 1800hp takeoff power, 1500 @ 18,000 feet 1200 @ 26,000
The drop in hp at altitude represents the extra power required to drive the supercharger. These are the engines that powered the 110. Whilst GM1 could have been used it would have been less effective than the AS engine, and would have been applied to the A model only I hope this is not too confusing. As for the DB605D this was a redesigned engine that attemped to cure some of the faults in the A model and get some more power out of it. :confused: :confused: š®
By: mmitch - 19th May 2004 at 21:45
You could try asking here at:- http://www.luftwaffe-experten.co.uk/index.html
mmitch.
By: TempestNut - 19th May 2004 at 16:19
The 110 had DB605aās the same as the early 109Gās. If they used NOX injection it would have been to raise the rated altitude of the engine and not the ultimate power. The power of the 605 was limited by the detonation limit of the fuel used. I have some figures at home if you are interested.
By: DazDaMan - 19th May 2004 at 13:22
You’re probably just asking the wrong people, or looking in the wrong places.
Have you tried Googling?
By: PhantomII - 19th May 2004 at 05:30
This isn’t the only time I’ve noticed this though.
Anything aside from the Spit or the Mustang to some extent gets very few replies on this forum. I’m looking for another historical forum somewhere, but it’s hard to find one that has the number of users this one does……so it’s either few responses on all types of topics or tons of responses about Spitfire topics……
I’m just SOL I guess.
By: Eddie - 19th May 2004 at 00:38
I don’t think it’s a case of people not wanting to answer, I think that it’s probably that no-one knows the answer! It’s a pretty obscure question…!
By: PhantomII - 19th May 2004 at 00:33
Is it even legal to post a thread about something besides the Spitfire on this forum?
I know there is a TON of knowledgeable people on this forum, and I only have one individual post anything….(thanks again DaveM2…I forgot to say that earlier)
Why must the forum be so limited in topics of discussion??
By: PhantomII - 17th May 2004 at 06:19
Thanks for the link. I posted the same quesiton there. Hopefully with the quesiton posted at two different forums I can get some information.
Of course on this particular forum you had better mention the Spitfire or the P-51 or you get little response……………
By: DaveM2 - 17th May 2004 at 04:48
Try here..
regards
Dave