microdon2

My Feedback: (47)

Update after flying - the newly-mounted OS 120 Surpass 4s ran very well this morning - and the Rev 70 flew great, though hard to tell, exactly, as it was windier than the 10mph projected on weather.com. Had one issue - when I pulled the throttle down to idle quickly for landing it stalled a couple of times - looks like I need to tweek the low end. Other than that it ran perfectly.

Agree with wjcalhoun - the DLE 20 is probably the best engine for this plane - light, lots of power and speed, and cheap fuel. And, mounted inverted, no visible holes in the cowl. Also very easy to start. (and no fuel clean-up...).

I'm about to rebuild my 2nd Rev 70 from NIB - I'll remount my DLE 20 in that plane.

MetallicaJunkie

yes, i read in another post that some ones elevator shattered on a high speed pass

MetallicaJunkie

ill take my time on this one... i also plan on using robart 1/8 hing points and ball links, i have tooo many 3d planes and need a nice fast sporty plane

microdon2

My Feedback: (47)

MettallicaJunkie - I've seen that happen on a Youtube vid, but that plane was a Rev 59 and doing over 150mph - was an electric plane. Very cool vids, btw. Once that tail went it was all over in about .2 seconds. Airraptor also does some amazing work souping-up his Rev 59 plane and uses Nitro engines - I think he's got an OS 120AX in a Rev 59. Not sure how fast he does, but it must be around 130mph. And close to the ground. Pretty impressive to watch. I think this link is correct: www.youtube.com/watch?v=_TRgyqgiPtQ

Neither of these pilots used wires, so I'd think you wouldn't need it, either. On the other hand, nothing wrong with experimentation, and I'd love to see pics and hear about your installation. Personally I don't like wires, as they tend to get in the way (though I realize on some builds they're required).

MetallicaJunkie

the tubing i bought was K&S Streamlined/Airfoiled http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXR853 ... ill prolly put em on to be safe, i know ill be tempted to go WOT on a spit S, or a dive plus ill need tail weight... any usable weight weight is better than lead i prolly post some pics..... i ordered it sunday evening and its "still being packed", ill get it after Christmas, and hopefully fly it before next year!

microdon2

My Feedback: (47)

So you'll use that solid tubing instead of wire? How do you attach the tubing to the rudder and elevators?

MetallicaJunkie

i crimp the ends and use 2-56 screws and nuts.... i got the idea from a flying buddy.... i have an Ultra Sport ARF "clone" that had an old 70s era 51 that flew it around ok.... i slapped a Rossi 45 and it fluttered like crazy on a high speed pass... lukily it happened right in front of me....if i wouldnt have chopped the throttle i wouldve lost it.... the elev stab cracked in a couple of places

prelude92

Hi Flyboy0608,

I'm deciding between an OS 95AX and a 75AX. Did you have issues balancing the plane with the larger engine on your Revolver? Also, do you think the it's worth it to upgrade to this engine? Thanks.

JC

microdon2

My Feedback: (47)

MetallicaJunkie - cool and simple idea. I like it.

Prelude - Go with the 95AX! No balance issues. I think the 75AX is under-powered for this plane.

prelude92

Thank you Microdon2. Is this what you have in your Revolver? Also, I was just checking out the FS-95 4stroke. What do you think about this engine on the Revol 70?

landeck

My Feedback: (1)

I have a Magnum .91 four stroke in my Revolver 70 and it is a good match. An OS .95 four stroke would be even better.

Bruce

Slow and Steady

Mine has a 75 AX and will do unlimited knife edge. 95 AX will allow for a bigger prop and better breaking on the down line, or more pitch and speed. Just my 2 cents.

prelude92

Bruce, how do you think that would compare to an OS 95AX 2 stroke. All these engine are in the same price range.

jc

microdon2

My Feedback: (47)

Prelude - I have two Rev 70's - one with an OS 120 Surpass 4s and the other with a DLE 20cc gasser. Both excellent engines, though the DLE 20 has more kick. I used to have a YS 140 in one, but that was just a TAD going overboard. I tend towards the overpowering end of the spectrum. But with a 95 AX and the right prop this plane will move nicely. (I can't recommend a prop, though, as I don't have that engine).

prelude92

Thanks, Slow and Steady

jc

capt1597

i'm flying this bird with a os 91 fx 2 stroke using an apc 14x8 prop burning 15% wildcat fuel. this setup will slow way down for landing while having been clock by radar three times at 109 mph. the 95 ax is probably going to better that by a nose. merry chistmas everyone, capt p.s. my plane wieghs 9.0 lbs, my question is - what do the gas burning planes wiegh.

landeck

My Feedback: (1)

The OS 95AX 2 stroke is more powerful than the Magnum 91 four stroke. The Magnum is about equivalent to or a little stronger than a 65 two stroke. What I was looking for was an engine that would give good performance without requiring extensive cutting of the cowl since the Revolver is such a good looking plane. A two stroke engine would require a pitts style muffler which would have required more cutting on the bottom of the cowl leaving part of the body of the muffler showing. With the Magnum only the rocker covers, needle valve extension, and the exhaust pipe of the muffler show. I did have to enlarge the exit on the bottom of the cowl for cooling reasons. Since then I bought a OS FS .95V engine for a TF P-47 which would give more power without requiring extensive cowl cutting on the Revolver. But it is twice the cost of the Magnum. The Magnum is turning a 14x6 prop at 9500 rpm which results in good performance for the Revolver.

Bruce

iflywhenican

My Feedback: (1)

Bruce, does this look familiar?

landeck

My Feedback: (1)

Yes, similar to that except that you can not see the muffler. I used a 80 degree adapter and routed the muffler down and out the bottom so that from the side you only see the exhaust tip of the muffler coming out the bottom. The combination works very well and I am quite happy with it.

Bruce

iflywhenican

My Feedback: (1)

Yeah, I started to do the same as you, but I opted for the side exhaust, hoping I would get less "slime" on the fuse. Turned out, that it probably didn't matter.

landeck

My Feedback: (1)

My exhaust is only sticking out about a 1/2 inch and is in the middle of the air flow exiting the cowl for cooling. As such I get all most zero slim on the plane. I lucked out in placement because of the the air flow around the Revolver cowl and its mixing with exit air keeps the slim away from the plane.

Bruce

warbird addict

plug one of the tubes on the pitts muffler your not getting enough pressure in the tank with both tubes on that pitts muffler being open

prelude92

Warbird addict,

I've heard of this problem with the OS 55AX. One suggested solution was to insert some sort of metal tubing in both exhuasts. Can you explain how to plug one of the exhausts, as you mention, as well as the other solution?

wjcalhoun

capt
My R70/DLE20, dual aft elevator servos, pull-pull rudder, 2100mAh LiFe battery weighs 9#11oz all up, dry.
On a Xoar 16x8 she makes at least 14# static thrust, and is not yet broken in. Plenty of T:W ratio for me.

Bill

capt1597

Bill, thanks for your response, capt