VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet


Go Back   VAF Forums > Model Specific > RV-9/9A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 11-10-2022, 11:00 AM
MacCool's Avatar
MacCool MacCool is online now
 
Join Date: Aug 2020
Location: central Minnesota
Posts: 1,478
Default

We should probably note that different parts of the world, different parts of the US, have widely varying seasonal temps, therefore may have widely varying pre-heat needs. One set of recommendations does not apply to all. Vancouver, however, has pretty mild winter temps making pre-heating likely to be somewhat less of a challenge.
__________________
RV-9A, 2011, bought flying
IO-320D1A (factory new), C/S
Dual Pmags
IFR equipped
AFS 5400/3500, G5, IFD440 navigator,
bunch of other stuff
Reply With Quote
  #12  
Old 11-10-2022, 11:41 AM
dmattmul's Avatar
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 564
Default WiFi

The cell switches work fine and easy to make. Let's not forget if your hangar has Wi-Fi (As both of mine do now) you can use a cheap Wi-Fi switch and no monthly fees. My Reiff sump heater worked great in the Ohio weather.
__________________
RV-14A QB builds (2017), Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Earth-X batteries, Beringer wheels and brakes, Parts became real airplane 8/15/2020. Started RV-10 Nov 2020. Empennage arrived (Built) Working on QB kits. Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 3 blade HRT 378, Earth-X batteries, Beringer wheels and brakes, real airplane hopefully early-mid 2024. Paid subscriber
Reply With Quote
  #13  
Old 11-10-2022, 11:52 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 8,042
Default

Quote:
Originally Posted by plehrke View Post
What rpm do you idle at during warm up before taxi?
I always wonder the trade of a bit higher rpm to warm faster and therefore less time at idle or low rpm idling which will take a bit more time to get warm. Or does it matter?
Lots of opinions and little fact in this area. I have yet to find an official recommendation, post radial engines anyways, that either recommends or even suggests that OT needs to be 100* before application of full power, especially with multi-viscosity oils (i would think differently if running 100 wt oil in 30* ambient temps, but then again Lycoming is clear that this is not recommended). I don't think I have ever taken off after a cold start with OT above 100* Engine in fine shape at 875 hours. I do worry about scuffing due to the different expansion of alum pistons and steel cylinders and will not take off until CHTs are 250. That is just my guideline, not taken from any source. Just imagine how much extra gas we would consume if every car was not driven until OT was 100* That is 15-20 minutes here in Midwest winters. Yep, this is where everyone tells me airplane engines are different. No different than my 911 air cooled boxer engine, also with no recommendation to get OT up to 100* before driving it, though some very knowledgeable people recommend keeping revs under 4K until over 125 OT.

I see guys here in the winter sitting on the ramp idling for 15 minutes to reach that magic number and just don't get it.

Larry
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019

Last edited by lr172 : 11-10-2022 at 12:06 PM.
Reply With Quote
  #14  
Old 11-10-2022, 12:41 PM
BillL's Avatar
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,910
Default Crisp/calm 0-30F days can be the best!!

Quote:
Originally Posted by plehrke View Post
What rpm do you idle at during warm up before taxi?
I always wonder the trade of a bit higher rpm to warm faster and therefore less time at idle or low rpm idling which will take a bit more time to get warm. Or does it matter?
If needed I use 1200 rpm. It does not take long and gives a chance for cockpit organization and pre-takeoff adjustments.

Diesel white smoke and warm up tests were done in the '80s and the warmup time was zero at low idle and the ideal measured in 1100-1300 rpm. Lots of testing and different issues, but seems to work for the plane driving a prop.

+1 for all the Reiff pads and cylinder bands. A composite prop does not chill the engine but some will need a hub/blade insulator. It is more of a factor that one imagines.

I like the 100F before takeoff just to keep the oil high pressure alarm from going off. My system as an accumulator so that is a consideration.

I use an engine crankcase purge and dry on each flight so only initiate preheat based on ambient temps. The Switch e ON has an ambient temp indicator and works well with phone activation.
__________________
Bill
RV-7
Reply With Quote
  #15  
Old 11-10-2022, 12:45 PM
Foghorn's Avatar
Foghorn Foghorn is offline
 
Join Date: Feb 2018
Location: Virginia Beach
Posts: 316
Default

Quote:
Originally Posted by mbuto View Post
Snip - I have an Earthx battery, and it performed well.
Mike - warming up your EarthX is also a good idea. I normally turn on all the lights during preflight and then raise/lower/raise the flaps before hitting the start switch.
__________________
Jeff Parker
RV8 Fastback (Tomís Dream) - Phase II (N767TS)
C195 (Red Dawg) - Flying (N4469C)
Retired Army CW4 - Helicopters, KingAirs, B737, MD11
Reply With Quote
  #16  
Old 11-10-2022, 01:13 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 3,279
Default Reiff

I have a Reiff system on my -10. Pad on the sump and band heaters on the cylinders. I also use the Switcheon box and turn it on the night before or a couple hours before I go, depending on OAT. I get between 75 and 85 degrees by the time I am ready to start.

Starts right up with EFII, I use about 950 rpm or so for the first couple of minutes; lower than 850 and the second alternator is off line.

Takeoff with 0ver 100, usually shoot for 120 or above.
__________________
Bob
EAA Tech Counselor
Aerospace Engineer '88

RV-10-ER
N464RL
In Paint at Evoke!
Garmin G3X-T, Barrett EFII S32, CAI, MTV-9B

Dues+ Paid 2022,...Thanks DR+
Reply With Quote
  #17  
Old 11-10-2022, 01:55 PM
MacCool's Avatar
MacCool MacCool is online now
 
Join Date: Aug 2020
Location: central Minnesota
Posts: 1,478
Default

I'm going to put in a plug for Switcheon as a cell-phone switch. I have no connection to the company but have been very impressed with their attention to customer service and commitment to making sure things work well.

All you need is a cell signal, and not even a very good one. It doesn't use sims, or cell phone accounts, text messaging, hot spots, or any of that other s stuff. It's a simple app, and uses IoT (internet of things) so bandwidth requirement is extremely low. Could not be simpler to use, and has been completely reliable.

..
Attached Thumbnails
Click image for larger version

Name:	Screenshot 2022-11-10 at 1.39.25 PM.png
Views:	27
Size:	1.09 MB
ID:	33606  
__________________
RV-9A, 2011, bought flying
IO-320D1A (factory new), C/S
Dual Pmags
IFR equipped
AFS 5400/3500, G5, IFD440 navigator,
bunch of other stuff
Reply With Quote
  #18  
Old 11-10-2022, 04:54 PM
larryMar larryMar is offline
 
Join Date: Nov 2018
Location: C77, Il
Posts: 117
Default

Lycoming operating manual....


a. Head the aircraft into the wind.

b. Leave mixture in “Full Rich”.

c. Operate only with the propeller in minimum blade angle setting.

d. Warm-up at approximately 1000-1200 RPM. Avoid prolonged idling and do not exceed 2200 RPM on the ground.

e. Engine is warm enough for take-off when the throttle can be opened without the engine faltering.
Reply With Quote
  #19  
Old 11-10-2022, 07:38 PM
N804RV's Avatar
N804RV N804RV is offline
 
Join Date: May 2013
Location: Mount Vernon, Wa
Posts: 954
Default

"Generally, I consider any start in which the engine is cold-soaked to a temperature below freezing (32 degrees Fahrenheit, or 0 degrees Celsius) to be a misdemeanor and any start below about 20 degrees F (minus 7 degrees C) to be a felony." - https://www.aopa.org/news-and-media/...d-misdemeanors

https://www.lycoming.com/content/ope...2020%CB%9A%20F.


That being said, one of those old milk-house heaters with some dryer duct blowing warm air (not hot) into the lower cowl for 10 or 15 minutes will make it easier to start on those 33f-45f mornings. Also, in cooler weather a carbureted engine will demand much more fuel to prime for the first start of the day.
__________________
Ken W.
Mount Vernon, WA
2022 VAF Supporter

Last edited by N804RV : 11-10-2022 at 07:48 PM.
Reply With Quote
  #20  
Old 11-11-2022, 02:57 PM
mbuto mbuto is offline
 
Join Date: Feb 2021
Location: Coquitlam
Posts: 11
Default

Any thought on the Twin Hornet 22 - Engine Preheater + blanket option? A remote cel option looks good too, but I am in Canada, so that may require some extra thought.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

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 06:10 AM.


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.