VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > RV Firewall Forward Section > Traditional Aircraft Engines
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04-24-2010, 08:42 AM
Steve Sampson Steve Sampson is offline
 
Join Date: Aug 2005
Location: N. Yorkshire, England
Posts: 1,050
Default EGT temps & prop surge?

My RV4 is a carburated O-320 running P-mags on the advanced curve, and has a pretty standard signature in a full power climb. You can see it here in this data off my AFS3400.



My first question is when is the EGT temp too hot? At 13:59:36 EGT3 (green) hits its highest temp, 1473F. Is this acceptable?
(While we use the EGT mostly for leaning there must be a temp where the temp is just too high.)

CHT #3 is also the hottest, I cant get enough air to it I guess. At 400F I started increasing speed. I had let it get a little slow while concentrating on avoiding cloud, and volcanic ash :-) and the speed increase largly controled it below 420F which I think is quite acceptable.

I would welcome any input.

My second question is a unique anomaly. At 14;14:32 just after I had adjusted the prop (brown) down to just under 2000rpm it suddenly speeded up to around 2040 then dropped to 1775 very abruptly before continuing untouched just below 2000 as before. What/why might that happen? It certainly got my attention!
__________________
Steve

G-IKON Build log here , or Index to blog here.
RV4 #4478 - Flying since 16th June '08. First flight video here.
Circuits at my 1000' strip.
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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 10:01 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.