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Conference vmszoo::rc

Title:	Welcome To The Radio Control Conference
Notice:	dir's in 11, who's who in 4, sales in 6, auctions 19
Moderator:	VMSSG::FRIEDRICHS

Created:	Tue Jan 13 1987
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1706
Total number of notes:	27193

145.0. "fuel tank sizes and flight times" by GOLD::GALLANT () Tue Mar 24 1987 14:28

    
    	I have a OS .25FSR that I have been breaking in. It runs for
    just about four miniutes at full throttle and four cycling. Can
    anyone guess as to what kind of normal flight time I can expect
    after I get it broke in and off the ground? It has a 4 oz. fuel
    tank and I've been contemplating changing it to a 6 oz. The 
    design called for a 4 oz. but after trimming the center of balance
    the batteries ended up aft of the servos leaving the whole forward
    section in front of the servos availiable for a tank. 
    
    				Michael Gallant

T.R	Title	User	Date	Lines
145.1	Go for a 6oz	LEDS::ZAYAS	`Tue Mar 24 1987 15:54`	11
	If you have the room and can tolerate the weight, put a 6oz tank in. I've got a .25FSR in my Scout and it still has about 1/3 of an 8oz tank after I'm exhausted. That's running 15+ minutes at full bore. If you ever need to loose weight for a fun-fly or something, just don't fill the tank up all the way. But if you're just putting around and not minding the clock too much, it's better safe than sorry. I hate dead-stick landings!
145.2	no problem here	ROCKET::ONEILL	`Wed Mar 25 1987 06:53`	10
	I have an O.S 35 that was first fed from an 8 oz. tank and was later changed to a 6 oz. tank. The 6 0z's. gives me plenty of time to cruise around at full trottle as well as anywhere inbetween. I went from 8 to 6 oz to save weight and dont feel I sacrificed to much flight time (although I'm not one for 15 min flights any way, ten is fine for me ). Also, I've found some of my best landings are dead stick ( I've heared that from others about their landings too )but dont get me wrong, I'm not recomending them, by all means, use 8 oz. if it will fit and you want the extended flight time, (hope this helped a little)
145.3	what size for a .049 powered glider?	OPUS::BUSCH	`Mon Aug 08 1988 10:03`	18
	Only having flown a glider, and that only a dozen flights so far, I've got a couple of questions regarding fuel. In my inogrance ;^) I would have thought that fuel was fuel. What are the differences between one mixture and another? What are the properties of different types of fuels and when would you use them? I don't recall the specifics but we bought some 10% (whatever that means) for my son's OS-40 powered PT-40 from Bob Fish. Is this a good/bad fuel, and can it be used for a Cox TeeDee .049? Also, I'm tired of traipsing through the waist_high grass and brush to plant the stake for my high-start and to retrieve the tow-line for each 2 minute flight (I took up gliding 'cause I thought it would be a relaxing sport. WRONG!). Tonight I'm going to try to build a power pod for the plane, and the purists be dammned. I got a 1 ounce tank but whoever I showed it to said I'd be up in the air forever. With an .049 on a glider, what would be a reasonable tank size and what would be the corresponding running time? What I need right now is stick time. I'll work on the finesse later. Dave
145.4	1 ounce too big	IGUANO::WALTER	`Mon Aug 08 1988 14:29`	16
	Re: -.1 This is getting a bit off the subject, but a 1 ounce tank is a bit big. I have two power pods for the TD .049. One is 1/4 ounce, and gives about 2 minutes run, the other is a D&R Products (?) pod, maybe 1/3 ounce and gives about 3 minutes run. That's long enough to get the plane to around 600 feet or so. I had a very difficult time getting the engine to run reliably. I finally took a hard look at the fuel delivery system and found it was allowing air to get in the line in several places. When I sealed the lines, it ran much better. So watch out for that. Dave