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  #21  
Old 12-19-2009, 02:15 PM
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thomasyost thomasyost is offline
 
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Default Fire Risk?

There seem to be a lot of good ideas here for warming up a motor for those colder temperatures, but I'd be a little concerned about having any type of heating element within a cowl and unattended.
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  #22  
Old 12-19-2009, 02:27 PM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by David-aviator View Post
Thanks. What you say makes good sense. I called Bob and the temp rise for the sump heater alone was measured with a 6 cylinder and it may be better with the 4 as there is less oil to heat.

I ordered the 200 watt HotStrip System. I'm sure Mr. Lycoming will like it very much as opposed to a 25F OAT cold start which I have been doing lately. The HOTSTRIP can be hooked up to a timer to come on at mid night and by dawn you're ready to blast off with a happy engine.

For $169, it is a very good deal.
My thoughts on why you might want to leave the HotStrip plugged in all the time instead of cycling it:

http://thervjournal.com/cold.html

Engine heat is a very good thing.
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Last edited by Sam Buchanan : 12-19-2009 at 02:30 PM.
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  #23  
Old 12-19-2009, 03:46 PM
David-aviator David-aviator is offline
 
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Quote:
Originally Posted by Sam Buchanan View Post
My thoughts on why you might want to leave the HotStrip plugged in all the time instead of cycling it:

http://thervjournal.com/cold.html

Engine heat is a very good thing.
Interesting read, thanks for posting it.
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  #24  
Old 12-19-2009, 03:51 PM
Norman CYYJ Norman CYYJ is offline
 
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Location: Victoria B.C.
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Has anybody tried the heat tape that you wrap around water pipes in the winter on the oil sump?
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  #25  
Old 12-19-2009, 10:19 PM
Reiff Preheat Systems Reiff Preheat Systems is offline
 
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Quote:
Originally Posted by Geico266 View Post
This is my BIG hair dryer. It fits under the cowl and blows warm air where the exhaust pipes are. I leave it on 24/7, keeps the oil 50F reguardless of OATs. I think this milkhouse heater was $20 + $15 for the duct work. Works on any RV.




Patent Pending
How many watts?
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  #26  
Old 12-19-2009, 10:27 PM
Reiff Preheat Systems Reiff Preheat Systems is offline
 
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Quote:
Originally Posted by Kyle Boatright View Post
On cold days (cold is relative, I consider 35F cold), I use 2 blowdriers and a Reiff Hotstrip. The blowdriers go into the cowl inlets, which are fitted with foam plugs (with holes in 'em for the blowdriers)...

With 20-30 minutes of this, the engine comes right to life when I crank it and the oil temp is usually 70+F so pressure comes right up. The CHT's are usually off the peg too.

And I do tend to hang around, just in case. One thing I do to mitigate the blow drier melt-down possibility is I don't put them on the highest heat or fan setting. I figure I'm running 'em at 1000 or 1200 watts, instead of 1500 or 1750.
I'm not sure the lower setting helps much. I think the weak link in the typical household blow dryer is the fan bearings (sleeves). The one failure I saw, the fan started screeching, the bearings apparently seized but the heating element stayed lit, then without the airflow to carry the heat away it quickly overheated and the housing started smoking. Again, I'm not criticizing the products. They work fine for the intended use.
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  #27  
Old 12-19-2009, 10:36 PM
Reiff Preheat Systems Reiff Preheat Systems is offline
 
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Quote:
Originally Posted by David-aviator View Post
Bob,

I did not know about your product until today. Sure looks like it is the cat's meow for preheat.

It would appear a "standard" system would work just fine on the 0360, or would the 100 watt rings without the sump heater be just as effective?

Not sure what I am reading with regard to heating times and temp rises on the chart. Are the 100 watt ring times with or without a sump heater with regard to oil temp rise?

Thanks. I have a BD coming up and my wife always wants to know what I need.
The System Specs table in the web site gives all the numbers for all the systems. The Standard system is 50w per cyl and 100w on the oil and will raise your entire engine about 80F above ambient overnight. Per the table the 100w cyl heaters with no sump heater will raise your oil about 80 and the top end about 100F.
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  #28  
Old 12-19-2009, 10:39 PM
Reiff Preheat Systems Reiff Preheat Systems is offline
 
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Quote:
Originally Posted by David-aviator View Post
The HOTSTRIP can be hooked up to a timer to come on at mid night and by dawn you're ready to blast off with a happy engine.

.
Max temp rise requires about 12 hrs... I suggest you set your timer for 6pm rather than midnight (see the heating time table in our web site).
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  #29  
Old 12-19-2009, 10:44 PM
Reiff Preheat Systems Reiff Preheat Systems is offline
 
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Quote:
Originally Posted by Steve View Post
I added a timer to my system thinking 24/7 heater operation would be too costly. I set the timer the day before to come on 2-3 hours before the ETD.
I use the same gray colored 1500W heater and 6 inch duct and "cowl adapter" as pictured in a previous post.
1500w at 24/7 would cost about $110 per month here (elec rate = about 10 cents per Kwh).
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  #30  
Old 12-19-2009, 10:46 PM
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N941WR N941WR is offline
 
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Here is an old thread on engine heaters with some good ideas.

http://www.vansairforce.com/communit...ad.php?t=38467
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