FUEL TANK QUESTION

My Jr. Flite Streak kit, which is nearing completion, call for 1.5 oz. profile tank. The plans say you can use the single "wrap around strap" which is provided, (it isen't provided), or, you can solder 2 straps to the tank prior to mounting. I've breifly looked @ various web sites for tanks and don't see any "profile" tanks @ 1.5 oz. Does anyone have any info as to where to go for this animal? Also, is a profile the same nomenclature used for "wedge" style tank? Should I be getting a larger tank instead?, or is the 1.5 oz. capacity called for as for weight reasons?
I would appreciate some help regarding this tank business, the plans are very vague. I'll be bolting up a OS LA .25 to the Jr. Flite Streak, if that is relevant.
Thanks alot.

The engine you are using is too large for this plane. It was designed at the time of much weaker engines and specified a .15 to .19. Any modern .15 is plenty strong enough.

Brodak has 2 oz OVAL fuel tanks which should be short enough. go to the brodak site at www.brodak.com and search for oval tanks. They also have tank straps listed.

AS was mentioned by phantomflier, the LA 25 is just "too big" weight and size wise (although you might could prop it down enough) for the Jr. FS. It was designed around the Fox and K&B 15s which were in the 4 1/2 oz. range IIRC.

Brodak bought out Perfect so all the Perfect tanks are available. There is a Perfect tank at 1 1/2 oz. that is of the triangular "profile" shape. Maybe #21. (???) Brodak's own line of tanks also has one around the 1 1/2 to 2 oz. size.

A modern OS 10 will fly the Jr. FS with no problems on 52' of .012 lines. Anything much bigger and you will need a 4 pitch prop (or less) to tame it down I would believe.

Bob: Brodak BH-473 1 1/2 oz tank should do it.

Thanks for that Lee, and thanks to everyone for guiding a misguided individual on the engine choice, I was about to order the OS LA .25, now getting the OS LA .15, on 2nd thought, I wish I wouldn't have got the info, then I would have had an excuse to build a plane around the .25, ha. Hey, that gives me an idea......

LA25 buy the regular Flite Streak, kit or ARF. Brodak has a 3.5 ounce tank that will fit. Get the short nose uniflow model, sorry don't have the tank number.

FS is very sensitive so be sure the CG is about 1/2 way between the leading edge and spar. Balanced on the spar it was a competitive slow combat ship.

HiBob,

I am in total agreement with PF on this htread! A 25LA will really fly a full size Streak real nicely.

I'm going to soon build a Combat Streak for a BBTU FP 20.

Some observations:

The Jr. FS will fly well with a modern .10, although will handle the .15.

The FS ARF has been reportedly flown well with a modern .15.

The TF version of the Jr. FS shows installations for baffle Fox .15 (steelfin), Torpedo green head .15 and .19, and the Fox .19 and .25.

The box picture on the TF version of the Jr. FS shows a Max-I .15, and possibly a Perfect #8 wedge tank.

I generally use a Perfect (now Brodak) #8, but this will not provide enough run time for a complete pattern.

My current Jr. FS is a Top Flite kit powered by a Fox .15X, with Perfect #8.

George,

Thanks for that info. How many cc, or oz.'s is the PERFECT #8?

Thanks,
Bob

LAST EDITED ON Jun-13-06 AT 11:37 AM (CST)
 
If the Perfect #8 is the same as the now Brodaks #BH-508, it is a 1 1/4 oz tank.

For info. I have a Ringmaster with an OS .25 FP on it. It had a 4 ounce tank. I flew it for the first time, right after I bought it, at VSC and after 19 1/2 minutes, it finally stopped. Whew!! I then installed a 2 1/2 oz tank. It lasted 9 1/2 minutes. In other words, OS engines, once run in, do not use a lot of fuel.

Thanks, Ty, I've logged that tidbit, valuable data for months to come as far as I'm concerned.

Another thought for what it might be worth re the FS Jr - - a P.A.W. 15 diesel?? Flew a FS Jr for many years with a (very old) Enya 15 diesel and it made a great combination. Plenty of room for the small fuel tank needed - gotta build another.

Mild Bill