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1.6 FX Engine props?

Old 08-22-2004, 06:22 AM
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Iceman30
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Default 1.6 FX Engine props?

I have an Edge, Hanger 9 with mentioned engine, what props are you guys running? I am running 18-6 Wide APC at 8200 rpm, but my vertical lines seem to slow a lot and seem like the engine has to spool up on take off before I have lots of power....Any idea?
Old 08-22-2004, 11:14 PM
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RCFREEK
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Default RE: 1.6 FX Engine props?

Prop-down man!! Use a smaller prop. I think this engine is a little underpowered for the H9 cap. btw, what is the wingspan? What is the wing area? What servos are u using, since i'm assembling a Wm cap too n want to compare. How do caps fly? How do they comapre to extras? Im asking these questions since i'm a first timer on scale aerobats.
Old 08-23-2004, 06:28 AM
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Iceman30
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Default RE: 1.6 FX Engine props?

It's actually on the Edge 540 25% 78" wing, 1010 sq, all 5625's except rudder 5645 on 6 volts, two 800 nicds, 2 switches, better safe than sorry imo....Motor has more than enough pull...not 3D pull, would need say Moki 2.1 or 1.8, but don't know if 1.8 would get it. I emailed a motor service center and told them the prop and rpm and they said they usually turn, on a 1.6 fx

Dear Valued Customer:

Thank you for your Email.

An O.S. Max 1.60 FX turning an 18 x 6 prop at 8,100 RPM is doing quite well. We normally turn a 16 x 10 at 8,600, and an 18 x 10 at 7,900 RPM. From your description, nothing's wrong.

That was from Hobby Services...I'm not sure of the caps specs but you shouldn't go wrong with those servos, at 6 volts, and they are digital, 5625- 133oz.... 5645- 160 oz.

lots of power for a 12lbs. plane. with this motor I can pull about 400 feet vertical before it starts to slow, but if I stop to torque it, I have to let it fall out of it, it will not pull out. But I haven't had a plane this size in a while, and I love it...I like more IMAC style aerobatics anyway..if want to 3D, need more motor !!! IMO

I'm not sure how your cap will fly. The Edge is rock solid, knife edge, some couple, not too bad, will SNAP on hard elevator, but I think all will if in the right position. I have only like 9-10 flights counting set up flights, so still getting rates where I want them and trying learn any bad habits....

speaking of habits, see I have to watch my $ now cause my 11 yrs. old son has picked up the r/c habit, so now I have two addictions to feed
Old 08-23-2004, 07:49 AM
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Blow n Go
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Default RE: 1.6 FX Engine props?

18-6 gives the most static pull.......best 3-D prop for the 1.6, but will fly the plane too slow for pattern work.

17-8 APC is the best all 'round prop.......pattern and 3-D capable.

16-10 APC would be the best for pattern only, but is no good for 3-D.
Old 08-23-2004, 05:09 PM
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Bob101
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Default RE: 1.6 FX Engine props?

I have an OS 1.60 in the Gene Soucy Extra - same size etc...

The last week I've bummed every prop I could from people...

The 18x6W gives lots of vertical and good 3-D. However it's heavy - very heavy.. like double what a Menz 18x6 weighs. It spins up slow and I'm turning about what you are - on 10% getting 8700 rpm peak and backing off to about 8200.

A Menz 18x6 will spool up faster and give nearly the vertical the APC does - but not quite. WIth the Menz I can reduce my takeoff roll from 35 feet to about 25 feet but can't go straight up as far afterwards.

The only Mejzlik prop I could borrow was a 20x6. Sounds like a lot - but actually if you measure it - it's closer to 19" than 20". Haven't tached it yet - but it doesn't feel like the engine is totally bogged down like I thought it would be. Put it on right before dark so no flights on it yet.

I have a H9 Cap 72" wingspan - similar to the edge. With an Irvine 1.50 turning a 16x8 prop it's a lead brick to fly. Good for learning how to fly a heavy/overweight plane.

Last thing - have you weighed your H9 Edge? I know they say 10.5 to 12.5 pounds but I've seen similar ones that weighed 14+ with the same engine or right around 14 pounds. There's only so much a 1.60 can do in a 14 pound plane. I know my H9 Cap weighs 14 with the 1.50.
Old 08-23-2004, 05:16 PM
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Bob101
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Default RE: 1.6 FX Engine props?

Forgot to add I wanted to try a Bolly 19x6 to get the peak RPM down a bit from close to 9k to closer to 8k where it feels to me the engine is really tuned/timed for....

However the few Bolly props I've seen are downright butt ugly in my opinion and I can imagine how many people at my field (like 3 of 125 members fly anything bigger than .60 size) about what's wrong with my prop....heh. Plus it's $45 just to try it.
Old 08-24-2004, 08:00 PM
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Iceman30
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Default RE: 1.6 FX Engine props?

please let me know how the Mejzik does, was thinking about trying one myself.

Thanks for the info..
Brian
Old 08-24-2004, 09:05 PM
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RSands
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Default RE: 1.6 FX Engine props?

This is a long shot in terms of installation, but if you can put a Jerry Smith tuned pipe on it you'll pick up ~900 RPM on an APC 18x6W. It would take some serious modifications or an external mount, so it may not be an option for you, but mine and a couple others I've seen tached will turn the prop a legitimate 9500 peak. Transition speed is good to excellent, and throttle response is also very linear. If you consider, give Ohio Model Products a call, they've got them ($100) and can further substantiate the performance increase. If you want to see how the motor performs on the pipe, check out the current video of the month on their site. The plane weighs 13.5+ lbs wet, and the motor is running ~700 RPM rich.
Old 08-27-2004, 12:58 PM
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mancha
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Default RE: 1.6 FX Engine props?

Iceman30: 17X8 does have what you are looking for.
I fly this engine with woodys, have not use APC`s yet, although I use them on smaller planes.
Old 09-03-2004, 04:26 PM
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xtraflyr
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Default RE: 1.6 FX Engine props?

Hey there,
My friends H9 Cap has a OS 160 with a APC 18x6w and it will pull it out of site from takeoff. Thats using 15%nitro 18% oil. Im not sure what the weight of your H9 Edge is though. The Cap is about 12lbs. You can stop it then punch it and it will continue climbing..
Good Luck,
Frank
Old 09-04-2004, 04:00 AM
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Default RE: 1.6 FX Engine props?

Best all round prop we found was APC 18x8 for Imac and 3D in a 2 metre model.
Old 09-07-2004, 02:06 AM
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Default RE: 1.6 FX Engine props?

my Sig Cap weighs 11# 8 oz dry and with a 160 fx and APC 18x6 it is great. I feel it is fast enough for IMAC, but you have to throttle the engine properly to avoid slowing too much. the 18x8 would be good as well. I want to try a pro zinger 18x6 for better spool up during hovering and I wish they made an 18X8 as well. the APC's are heavy for thier size. I thought I was running about 8600~8700 with a BCM pitts, I get about the same with 10 or 15% nitro.

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