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Old Jul 26, 2014, 01:33 PM
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army_eod's Avatar
United States, PA, Windsor
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Brodak Oriental ARC

Please recommend an engine for this model.
I am thinking O.S. .46 LA-S
Also thinking lots of other engines.
Recommendation?
Fox .35?
O.S. .40
It seems on the bench with the .46 LA I am consuming about one oz per minute. With a 4 oz tank (recommended by Brodak plans) that is a 4 minute flight at best...not long enough. I can look at a bigger tank, of course.

Seems the .46 has plenty of power. I saw a video of someone flying the Oriental with the O.S. 46 and lap time was about 4 seconds; pretty fast.
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Old Jul 26, 2014, 04:49 PM
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Friend had an Oriental ARC, and it looked pretty good to me. If I were to build one, I would install a Fox stunt 35, the engine it was designed for. Back when I was flying, I could fly the pattern with 4 sec lap times, but slower than that is better if the airplane and engine are happy. Around 5 sec is the usual recommendation. A four oz tank is pretty standard for a Fox.
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Old Jul 26, 2014, 05:29 PM
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Jim; I was thinking of using the Fox. I have four of them. I can keep it light. I am old school. I appreciate the recommendation. I will go with the Fox. I can use the .46 for something else.
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Old Jul 28, 2014, 09:02 AM
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Fox 35 likes 35-40oz... the OS Max 35S likes up to 45 oz... My own experience with the LA 46 has been not as good as I had hoped, I have not given up on this engine... it could have been my fuel ... the Brodak 40 is impressive. Lap time is a funny thing... if the plane is heavy then you will have to fly it on shorter lines at a faster speed... my own Oriental weighs 43oz, I am using 59 ft eye to eye lines and lap times are right around 5-5.1 sec per lap.. I ended up using a 10x6 TF Power Prop. The LA 46 is a lot of engine compared to the little 35S... I was using a Dixon FP 40 in my Humongous with no problems... my best score in Advanced was made on a Dolphin that had gone lean and was flying what I would estimate to be 4.5 sec laps.. go figure...

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Old Jul 29, 2014, 04:31 AM
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Cancel Christmas; Just decided to go electric with this Oriental...
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Old Jul 30, 2014, 06:37 PM
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Dee Rice designed this airplane. If you would like to contact him, I am sure he would be able to answer any power questions you may have. He has two of them and both look great.
His email address is golfrice1@yahoo.com.

Good luck,
Colin
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Old Aug 02, 2014, 04:02 AM
robinson727
USA, MS, Byhalia
Joined Nov 2010
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Quote:
Originally Posted by army_eod View Post
Please recommend an engine for this model.
I am thinking O.S. .46 LA-S
Also thinking lots of other engines.
Recommendation?
Fox .35?
O.S. .40
It seems on the bench with the .46 LA I am consuming about one oz per minute. With a 4 oz tank (recommended by Brodak plans) that is a 4 minute flight at best...not long enough. I can look at a bigger tank, of course.

Seems the .46 has plenty of power. I saw a video of someone flying the Oriental with the O.S. 46 and lap time was about 4 seconds; pretty fast.
We used an OS 40 spinning a 11X7.5.. Aftermarket delrin venturi insert with ST needle valve.. (origional.. no aftermarket crap) You need the largest tank that will fit.. 6oz??
5.1 to 5.2 sec. laps on 60 foot 012" lines..

Ours was fun.. until it quit on an overhead.. aftr 3 flights last week with my son on the handle. Rats..

Now ?? ARF Nobler with a Turnigy 3536 X 1200 kV spinning a 10X 5 and a 3s 3000mah pack.
eFligjt timer and a Turnigy 40A esc.. We test flew it today and it's a hoot..
Quiet.. and reliable.. 2 lb. 8 oz..
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Old Aug 02, 2014, 05:37 AM
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Well the OS .46 sucks up fuel very fast and a 4 oz tank will not allow enough time for the pattern. Crazy thought; if a Fox .35 stunt will fly this ship, then the OS .25 LA swinging a 10-5 should fly it as well. The OS .25 makes as much power as a Fox .35 on paper and is very reliable and gets a real good breaking run. What say you? OS .25 for the Oriental?
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Old Aug 02, 2014, 09:20 AM
BWA
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I would, but, then again, I like a little bit of slack in the lines.
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Old Aug 02, 2014, 10:11 AM
BWA
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sorry, double post....
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Old Aug 02, 2014, 01:07 PM
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Quote:
Originally Posted by army_eod View Post
Well the OS .46 sucks up fuel very fast and a 4 oz tank will not allow enough time for the pattern. Crazy thought; if a Fox .35 stunt will fly this ship, then the OS .25 LA swinging a 10-5 should fly it as well. The OS .25 makes as much power as a Fox .35 on paper and is very reliable and gets a real good breaking run. What say you? OS .25 for the Oriental?
I've had a couple of them, and wasn't well impressed. Of the more current engines, the Brodak 40 would be fine. An Oriental is a 1950s design, and "small", while the Fox 35 is a 1947 design, and I'd rather match thr plane to the period powerplants, like an OS Max-S 35, a Johnson "S", or a Fox 3-bolt 25 stunt.

That latter one would do a pattern on 3 ounces, I think. The Johnson would need the full four ounces, and the Fox would fly quite a few extra laps at the end of the pattern on four ounces, unless the plane was a bit overweight. A custom tank for a Fox in a plane that size would be about 3.7 ounces' worth, offhand (I can't recall a Max-S 35's fuel consumption rates).


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