Engine for Brodak Oriental ARC

[Rob Duckering]

Hi all......I have a Brodak Oriental ARC and I'm asking for input on engine choices. I also have built a kit version a few years ago and powered it with a George Aldrich prepped Fox 35 with the ABC P&S. That airplane came out nose heavy even with the Fox. I'm looking for lots of power in a lightweight package. I have a few engines currently to choose from. All of the LA's (25-46), as well as a 25VF and a PA 40 lite (overkill?)......Kit bashing is no problem.....in the engine bay.

Thanks for any input.....

[Ralph Wenzel (d)]

Hi Rob,
Do you still have the Aldrich-Fox? I'd bet that the OrientalARF would not come out nose-heavy, given all the plastic covering behind the CG. Otherwise, your LA .40 should be fine.

BTW, your PA .40 Lite should be absolutely perfect in the RSM kit of the Oriental+, published by Dee Rice a couple of years ago!

[Roger Vizioli]

Rob,
A club member has the prototype (aka the first) Brodak ARC Oriental and it is powered by a Brodak 40. Excellent combination.
"I believe" the PA40 is too much power for the Oriental.
Roger V.

[Rob Duckering]

Yup, still have the Aldrich/fox.....Would the 46 LA be a better choice over the 40 because the 46 is lighter? One of the guys in our club built an ARF oriental with the 40 LA and had to add 3 ounces in the tail to get it to balance correctly. I would like to avoid adding any unecessary weight but I realize I may not have any choice because of the Oriental's long nose moment.....(9" from nose ring to leading edge of wing). Also, this oriental is the ARC version (ready to cover).....

Cheers.....

[Rob Duckering]

(A club member has the prototype (aka the first) Brodak ARC Oriental and it is powered by a Brodak 40. Excellent combination.
"I believe" the PA40 is too much power for the Oriental.
Roger V. )

Thanks for replying Roger, Yes, I really do not want to use the PA 40 in an Oriental.....Its probably going to end up in a stretched Gee-Bee.....
Possibly, the Brodak 40 is the way to go.....I had one of the first run of engines and was never impressed with it but lately I have seen some nice running ones.....

Cheers

[Roger Vizioli]

Rob,
The Brodak 40 is a late model engine, definitely a good performer.
My PA 40 going in a Humongous! Not period correct but should be neat! 
Roger

[Mark Scarborough]

My ARC Oriental is covered by Monokote (I still crash to much to do a dope finish to fly) , I prebalanced it, added one ounce under the fuse filler above the stab. I am running an FP 40 with a toungue muffler. Balance is spot on with a plastic spinner and a wood prop. Dont forget to correct the gear location otherwise it will bounce like a saddle bronc on landings, ask me how I know! lol It is really well powered with the FP just loafing.

[Bob Zambelli]

I built the first ARF Oriental (RIP) and powered it with a Fox .35 (STOCK) and it was perfect.

The Brodak .40 should be ideal also. I would not go to a heavier engine since the amount of tailweight needed might make it sluggish.

Bob Z.

[Dennis Adamisin]

I'm with Bob Z on this.  I am flying my Oriental with an LA 40 and it is a great match.  However I hate that i'm carrying so much tail weight to balance.  I'm thining about swapping in the Brodak 40 with a tongue muffler and pulling out most or all of the ballaast to net a 3-4 oz savings with the same or more power.

Nice trade-off I figure...!

[Louis Rankin]

If you use a Brodak 40, Fox 35, or a McCoy 40 RH or BH, you will not have to add tail weight.  Use and LA 40 or 46 and your performance will suffer due to adding gobs of tail weight.

Highly recommend the Brodak 40 with tongue muffler!!!  APC 10.5X4.5 prop!

[Bill Little]

I agree with Louis' suggestion: Brodak 40, 60' eye to eye .015, APC 10 1/2-4 1/2 to start with, upper "9s" at launch.  Lighter weight engine will be much better, much less barbell effect. 

If you experience ANY problems with the Brodak 40, contact Tom Hampshire (a member here) and he can set you straight.  He was a major part of the developement of that engine.  Plus, he's a pretty good dude.

[Jim Oliver]

I think I may have replied to this question "elsewhere" but, here goes anyway---

My (thrice crashed/rebuilt) Oriental ARF uses a B40 and the stock muffler, Powermaster 10/22, Pro Zinger 11x5 at 8800-8900 rpm, 60 ft. eye to eye.  Sig Plyspan/Sig dope finish.

Could not ask for easier starting or nicer engine run-----now, if I can just learn to fly it!!

Jim

[Bill Little]

Hi Jim,

I would be curious to know what happens if you go to the APC 10 1/2-4 1/2 and up the rpm into the mid-upper 9000 range.  Might get the engine up into its power band a *little* more.  It still seems to give a good "break" there......

[Jim Oliver]

Hi Bill,

I am getting a nice break with the 11x5, but am not opposed to experimenting.  I have seen the 10.5x4.5 suggested before; if I try it I will report the results.

Thanks,

Jim

[Bill Little]

Hi Bill,

I am getting a nice break with the 11x5, but am not opposed to experimenting.  I have seen the 10.5x4.5 suggested before; if I try it I will report the results.

Thanks,

Jim

Hi Jim,

That's all I was suggesting.  I would like to hear a comparison of the good, the bad, and (possibly) the ugly.  I have not personally tried the 11-5 on the Brodak, so I am interested!

Thanks!

[steven yampolsky]

Hi all......I have a Brodak Oriental ARC and I'm asking for input on engine choices. I also have built a kit version a few years ago and powered it with a George Aldrich prepped Fox 35 with the ABC P&S. That airplane came out nose heavy even with the Fox. I'm looking for lots of power in a lightweight package. I have a few engines currently to choose from. All of the LA's (25-46), as well as a 25VF and a PA 40 lite (overkill?)......Kit bashing is no problem.....in the engine bay.

Anything over 6.5oz will cause the model to be nose heavy reqireing tail weight. Rick Campbell flew his Oriental ARF with B40 with a little bit of tail weight. B40 didn't know htere was a model attached to it. Needless to say, the model performend superbly.

I haven't tried it but I think Brodak 25 will be perfect for Oriental ARF. It's lighter than B40 yet produces enough power to pull the model through anything. It also happens to be lighter than B40 which in turn may remove the need for ANY tailweight.

[Rob Duckering]

Thanks guys....I'm stopping at the local hobby shop to pick up a Brodak 40 after work today.....I'll do a good break-in and see how it goes....In fact, I'll most likely install it in my kit built Oriental before the new ARC is ready.....

Cheers

[john e. holliday]

Rob,  after following the directions on the break in of the Brodak 40,  expect to put more break in time on it in the air.  In fact I put mine in the ARF Nobler just to see how it was going to run.  I had it so rich that it ran out of fuel going into the horizontal 8.  That was 3 1/2 ounces of fuel.  It has been in the Olympic that I lost in Iowa.  Was then put in the ARF Oriental which was a terrific plane as long as the wing stayed in place.  Now it is awaiting for me to check the controls.  Seems I now have more flap than elevator.  Brodak 40 may go into the ARC Vector 40 when I get to it.  Have fun,  DOC Holliday

[Robert W]

I would also agree with using the B-40. I had one in an ARF Nobler and tried most props recommended above before settling on a wood zinger 10X6 using GMA 5% fuel. It was not that the other props were bad, but this combination seemed to work. I have since tried an LA 46 on the Nobler and will be putting another B-40 in before I fly it again.