Spitfire vs different models of zeros - Aircraft of World War II

Micdrow · 08-13-2007, 04:55 PM

Spitfire comparisons vs different models of zero's

Enjoy

Wildcat · 08-13-2007, 05:57 PM

Excellent!! Still scouring the Australian archieve eh! I loved the comment from the Beaufighter report "Watch out s/e fighter boys or you will be out of a job"

Micdrow · 08-13-2007, 06:12 PM

Yeah there is lots of info there, just takes alot of time finding stuff of interest. Its surprising though what you can find if you take the time.

Wildcat · 08-13-2007, 08:35 PM

Quote:

Originally Posted by Micdrow

Yeah there is lots of info there, just takes alot of time finding stuff of interest. Its surprising though what you can find if you take the time.

Tell me about it! I've spent many hours going through various squadron ORB's. fascinating stuff.
Many thanks for your efforts mate, I for one appreciate it!

Micdrow · 08-13-2007, 08:59 PM

Your welcome Wildcat. I wonder if we make a squadron ORB thread in the Main technical message area on the info there if people would be interested?

Maharg · 08-18-2007, 01:10 AM

Quote:

Originally Posted by Wildcat

Many thanks for your efforts mate, I for one appreciate it!

I totally agree with you Wildcat.

MD you have gone above and beyond for this forum. Thank you very much.

All the best.
Graham.

Micdrow · 08-18-2007, 10:16 AM

Thanks again guys and your welcome, to be honest I never in my wildest dreams thought that this would go so far or this big.

Thanks again!!!!

slaterat · 04-05-2008, 01:19 AM

Thats a great find thanx.

Slaterat

Ivan1GFP · 11-02-2008, 08:35 PM

Hello All,
That Spitfire Vc versus A6M3-32 comparison makes interesting reading. (I presume these were the models being compared.)

One interesting thing I found was the quoted maximum speed of Hap:
335 mph @ 16,000 feet with engine at 2600 rpm and 40" boost (about +250 mm) seems to be way too low of a throttle setting. 2700 rpm is the military power setting and 2750 rpm at 41.7" boost (+300 mm) is WEP setting.

This is a minor change in topic, but recently I have been watching You-Tube videos. Some appear to be historic Japanese and some are of a A6M5 (61-120) that is still flying today. I watched a Ki-43-I Oscar do a full 360 degree roll in about 1.5 seconds. The modern A6M5 did a full 360 degree roll in 3.1 seconds and did not appear to be really rolling as fast as he could. I have seen the tables in NACA Report 868 which suggest that at least the Zero should roll a whole lot slower. Capt. Eric Brown suggests that the Zero did not have a high roll rate. The A6M5 pilot (Steve Hinton?) claimed that the Zero had a very good roll rate. With the Huge ailerons, I would guess that the A6M5 pilot was right.

How does one resolve all these conflicting reports?

- Ivan.

FLYBOYJ · 11-02-2008, 08:47 PM

Keep in mind as well the flying Zeros you see today don't have original engines as far as I know.

Ivan1GFP · 11-02-2008, 10:48 PM

This particular A6M5 Zero is the only one still flying with the original Sakae 21 engine (1695 CID). The others are all flying with some variant of the P&W R-1830. I don't see how a slight engine change would affect the roll rate that much.

- Ivan.

FLYBOYJ · 11-02-2008, 11:52 PM

Quote:

Originally Posted by Ivan1GFP

This particular A6M5 Zero is the only one still flying with the original Sakae 21 engine (1695 CID). The others are all flying with some variant of the P&W R-1830. I don't see how a slight engine change would affect the roll rate that much.

- Ivan.

I would investigate the difference in torque between the 2 engines with their respective propeller installations. I know Steve Hinton and run into him several times a year, the next time I see him I'll ask him about his comments.

Ivan1GFP · 11-03-2008, 11:36 AM

Please ask him what he thinks the maximum roll rate is on the A6M5 he flies, and "Does he know that he is contradicting NACA Report 868?"

- Ivan.

FLYBOYJ · 11-03-2008, 12:31 PM

Quote:

Originally Posted by Ivan1GFP

Please ask him what he thinks the maximum roll rate is on the A6M5 he flies, and "Does he know that he is contradicting NACA Report 868?"

- Ivan.

Will do Ivan - I may out his way at the beginning of December, anytime I'm at Chino I always try to get by the museum. If I don't see him then, It might not be till the spring or early summer.

Matt308 · 11-03-2008, 12:59 PM

It could also be self imposed restrictions on aerobatics to minimize airframe stress.

08-13-2007, 05:57 PM	#2
Wildcat Senior Member Join Date: Apr 2005 Location: Queensland Posts: 4,543	Excellent!! Still scouring the Australian archieve eh! I loved the comment from the Beaufighter report "Watch out s/e fighter boys or you will be out of a job" __________________

08-13-2007, 06:12 PM	#3
Micdrow “Archive” Join Date: Aug 2006 Location: Wisconsin Posts: 4,852	Yeah there is lots of info there, just takes alot of time finding stuff of interest. Its surprising though what you can find if you take the time. __________________ "Valor does not mean Hero."

08-13-2007, 08:59 PM	#5
Micdrow “Archive” Join Date: Aug 2006 Location: Wisconsin Posts: 4,852	Your welcome Wildcat. I wonder if we make a squadron ORB thread in the Main technical message area on the info there if people would be interested? __________________ "Valor does not mean Hero."

08-18-2007, 10:16 AM	#7
Micdrow “Archive” Join Date: Aug 2006 Location: Wisconsin Posts: 4,852	Thanks again guys and your welcome, to be honest I never in my wildest dreams thought that this would go so far or this big. Thanks again!!!! __________________ "Valor does not mean Hero."

11-02-2008, 08:47 PM	#10
FLYBOYJ IP/Mech THE GREAT GAZOO Join Date: Apr 2005 Location: Colorado, USA Posts: 16,050	Keep in mind as well the flying Zeros you see today don't have original engines as far as I know. __________________ "IF ITS RED OR DUSTY, DON'T TOUCH IT"

04-05-2008, 01:19 AM	#8
slaterat Senior Member Join Date: Feb 2008 Posts: 145	Thats a great find thanx. Slaterat

11-02-2008, 08:35 PM	#9
Ivan1GFP Senior Member Join Date: Mar 2008 Posts: 270	Hello All, That Spitfire Vc versus A6M3-32 comparison makes interesting reading. (I presume these were the models being compared.) One interesting thing I found was the quoted maximum speed of Hap: 335 mph @ 16,000 feet with engine at 2600 rpm and 40" boost (about +250 mm) seems to be way too low of a throttle setting. 2700 rpm is the military power setting and 2750 rpm at 41.7" boost (+300 mm) is WEP setting. This is a minor change in topic, but recently I have been watching You-Tube videos. Some appear to be historic Japanese and some are of a A6M5 (61-120) that is still flying today. I watched a Ki-43-I Oscar do a full 360 degree roll in about 1.5 seconds. The modern A6M5 did a full 360 degree roll in 3.1 seconds and did not appear to be really rolling as fast as he could. I have seen the tables in NACA Report 868 which suggest that at least the Zero should roll a whole lot slower. Capt. Eric Brown suggests that the Zero did not have a high roll rate. The A6M5 pilot (Steve Hinton?) claimed that the Zero had a very good roll rate. With the Huge ailerons, I would guess that the A6M5 pilot was right. How does one resolve all these conflicting reports? - Ivan.

11-02-2008, 10:48 PM	#11
Ivan1GFP Senior Member Join Date: Mar 2008 Posts: 270	This particular A6M5 Zero is the only one still flying with the original Sakae 21 engine (1695 CID). The others are all flying with some variant of the P&W R-1830. I don't see how a slight engine change would affect the roll rate that much. - Ivan.

11-03-2008, 11:36 AM	#13
Ivan1GFP Senior Member Join Date: Mar 2008 Posts: 270	Please ask him what he thinks the maximum roll rate is on the A6M5 he flies, and "Does he know that he is contradicting NACA Report 868?" - Ivan.

11-03-2008, 12:59 PM	#15
Matt308 aka Dickcheese Join Date: Apr 2005 Location: Washington State Posts: 13,386	It could also be self imposed restrictions on aerobatics to minimize airframe stress. __________________ "Some people spend an entire lifetime wondering if they made a difference in the world. But, the [U.S.] Marines don't have that problem." -- Ronald Reagan Master of Duplicate Posts

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