Dcs a10c cbu spin settings - ED Forums
 


Notices

Reply
 
Thread Tools Display Modes
Old 10-14-2019, 11:18 AM   #1
Flightsimnerd
Junior Member
 
Join Date: Jun 2019
Posts: 26
Default Dcs a10c cbu spin settings

Hello all
I wonder if you can help
I have read on page 290 on the a10c flight manual you can change the CBU spin settings but I can’t find any way to do it.
Thanks in advance
Flightsimnerd is offline   Reply With Quote
Old 10-14-2019, 02:00 PM   #2
SmirkingGerbil
Member
 
SmirkingGerbil's Avatar
 
Join Date: Jan 2013
Location: USA, Midwest
Posts: 127
Default

Are you trying to do it from Profile of DSMS, INV page and selecting CBU-->97 (example)?

If so, under that menu you will get settings for (depending on ordinance) HOF - Height of Function, and SPIN. Referencing the DSMS MFCD screen.

Also, a quick Google of HOF and Spin setting will yield a ton of references on this.
SmirkingGerbil is offline   Reply With Quote
Old 10-14-2019, 02:38 PM   #3
Flightsimnerd
Junior Member
 
Join Date: Jun 2019
Posts: 26
Default

[QUOTE=SmirkingGerbil;4073391]Are you trying to do it from Profile of DSMS, INV page and selecting CBU-->97 (example)?

If so, under that menu you will get settings for (depending on ordinance) HOF - Height of Function, and SPIN. Referencing the DSMS MFCD screen.

Also, a quick Google of HOF and Spin setting will yield a ton of references on this.[/QUOTE
inv and i will google it now
Thanks
Flightsimnerd is offline   Reply With Quote
Old 10-15-2019, 04:11 PM   #4
Yurgon
Campaign Testers
 
Yurgon's Avatar
 
Join Date: May 2010
Location: Germany
Posts: 7,441
Default

Also, the CBU-97 and -105 don't spin, only the CBU-87 and -103 do.
__________________
Yurgon is offline   Reply With Quote
Old 10-15-2019, 08:59 PM   #5
Frederf
Veteran
 
Join Date: Dec 2008
Location: Campbell, CA
Posts: 4,339
Default

Only certain CBUs spin and CBU spin is a "matter of fact" physical property of the weapon. And just like all physical properties of weapons, that is told to the airplane when entering the weapon details in inventory. It won't appear in profile because profile data is pilot selection and spin isn't a pilot choice.

Try to enter a CBU-87 using the inventory system and you'll see the selections for HOF, fuze type, spin, etc. CBU-97 and -105 don't spin but instead use a gas bag like a car airbag to push out the BLU-108 submunitions. As such they don't have any variability in spin and thus no option when entering inventory details.

One I don't understand is CBU-103 because it's BLU-97 submunitions which are normally spread by spinning (although a 0 RPM spin is an option for CBU-87) but WCMD probably can't guide and spin. Can anyone tell me how WCMD (CBU-103) is able to fly the weapon and spin at hundreds if not thousands of RPM? It seems like spinning and guided flight by moving tail fins would be incompatible.
Frederf is online now   Reply With Quote
Old 10-16-2019, 03:33 AM   #6
Eddie
Veteran
 
Eddie's Avatar
 
Join Date: Dec 2008
Location: Somewhere in the PG Map
Posts: 4,932
Default

The spin only occurs in the terminal phase prior to the canister bursting to disperse the submunitions. For CBU-87/103 the fins angle themselves to produce the configured spin speed.
Eddie is offline   Reply With Quote
Old 10-16-2019, 03:46 AM   #7
Frederf
Veteran
 
Join Date: Dec 2008
Location: Campbell, CA
Posts: 4,339
Default

Brilliant, I had my suspicions WCMD-CEM had separate guidance and spin-up-dispense phases. Kinda pleased with myself for guessing correctly. I'm a little surprised that -87s also wait to spin. So an -87 dropped from 30,000' falls mostly fins retracted or fins straight and only for dispense spins up? Or are -87s spinning the whole drop?
Frederf is online now   Reply With Quote
Old 10-16-2019, 04:20 AM   #8
Yurgon
Campaign Testers
 
Yurgon's Avatar
 
Join Date: May 2010
Location: Germany
Posts: 7,441
Default

Quote:
Originally Posted by Eddie View Post
The spin only occurs in the terminal phase prior to the canister bursting to disperse the submunitions. For CBU-87/103 the fins angle themselves to produce the configured spin speed.
Good to know, thanks!
__________________
Yurgon is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 05:05 PM. vBulletin Skin by ForumMonkeys. Powered by vBulletin®.
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.