MJD

My Feedback: (1)

I'm wondering out loud if the remote needle has enough sensitivity that when rotated through the travel of the servo/linkage setup it has enough effect? Just wondering if it could be too broad or okay, I don't know the answer myself and it had me wondering of the remote needles are set up for more control over the angular range.

MJD

combatpigg

My Feedback: (3)

MJD, I doubt they are that broad of a range, but I don't know.

Today is "order stuff and get my act together day" Need advice for:

1. A pair of servos. I've got a pair of monster servos in another plane, but would like to hear comments about less expensive ones that are made to mount flat and still hold up to the vibration. Bear in mind that flown like a speed plane, the elevons never need to be deflected more than 1/4", so I think the most important issue is the servo's ability to survive the buzzing [that no amount of prop balancing will eliminate at 30,000 rpm].
I recollect pylon racers of 25 years ago talking about mounting their standard servos in puddles of silicone caulk...no hardware, just GE silicone.

2. HD control horns for the elevons. The big Tower catlogue on page 82 has some HD hardware listed, but I can't tell what is what without a better look. I have in the past made my own horns from #6 screws and home made aluminum pedestals. The clevises were HD nylon with metal pins and 4-40 pushrods with C/F tubing. Anyone with use this stuff on the bottom of page 82?

lfinney

My Feedback: (44)

they perry remoes are goof with servo throw travel, yah get them in the ball park then give it a try..the buy and sell side of this site often has remote n/v assemblies , being sold by guys selling off their IC d/f stuff

CP most of the new servos are mostly SMP construction, so if you surface mount them its OK, the old servos with discrete wired components had issue sometimes but it was usually with the potentiometer going ga ga

MJD

My Feedback: (1)

Sorry no catalog, but if it;s of any use, I used GP large scale horns, 4/40 clevises and rod, CF pushrod, as shown here. I just bought 2 packs of the 1-1/8" steel Sullivan control horns, they have plastic inserts, and seem light and indestructible - but I won't have used them until the next Demon takes to the air. You can see on mine how I used the outer hole on the horns, and one in on the servo. I could still move that one in a notch and have enough throw, and my end points are not set past 100%. These satisfy my criteria about feeling safe carrying the model around by the elevon linkages.. not that I suggest that.

The Dubro large scale plastic horns are massive chunks of plastic and I would skip those. The GP are more sensible but definitely much beefier than the usual fare.

As to servos, I've been advised to skip HS 625's due to numerous field reports of centering issues and what have you, and claims of crashed due to their failure. I need to swap mine out before they fail, they have been working for 30-40 Magnum flights and are now on my Demon #1. I don't doubt the claims, I'm just not a statistic yet. But given that the reports center around potentiometer fault, maybe an FAI .40 powered flying snare drum head is not the place for these.

MJD

combatpigg

My Feedback: (3)

Thanks for taking the time. I can see that those horns would never be at fault for a crash.

I oalready ordered the long bolt / pedestal style, we'll see what they look like in person. If the look too wimpy it isn't too much work to make my own. It takes about 2 beers.

smoknrv4

My Feedback: (11)

Some pics of the new muffler on mine, boy what a difference a tuned exhaust will do for a .46 FX. It even looks cooler.[8D]

MJD

My Feedback: (1)

I bought one for my FX too, but it was mounted on an Ultra Stik and wouldn't clear the fuse. Currently it is fitted to my West .50 since I don't have a new header yet. Runs well on there, but of course not the hit of the open pipe.

I will build one for the FX, I need one in the stable so I know what they do, and for horsing around in ways I wouldn't bother with the others with more valuable engines.

MJD

smoknrv4

My Feedback: (11)

Those FX's aren't a bad engine, I have three of them, two not used right now Hmmmmm.......

vicman

My Feedback: (10)

What does the throttle do? I always just shove the left stick forward for flying and rearward for landing. [sm=stupid.gif]

vicman

My Feedback: (10)

CP,
Regarding cheaper servos I am quietly enamored with Hobbico HS-12 or something like that. Tons of torque and under 15$. I've been running them in my quickies this year with no issues. The post type horns work really well and are easy to use. Once you use CF rod and ball links for control rods you will never go back, they are the tightest way I have found to connect a servo to the surface yet and simple to make.

MJD

My Feedback: (1)

It's more scale than most people realize..

MJD

Mike Connor

My Feedback: (5)

Have you taken a RPM reading with and without the exhaust deflector? I tried one on a Jett tuned muffler and it cost me a couple hundred rpm.

MJD

My Feedback: (1)

Tempting though, aren't they? With mine on the Jett SE, there was a river of castor spooge down the right wing each flight, yech. Much cleaner with a piped engine!

MJD

combatpigg

My Feedback: (3)

200 rpm represents .05 mph.

evan-RCU

How do you figure? 2000rpm is only 0.5mph?

combatpigg

My Feedback: (3)

You should know as well as anyone that the math isn't linear. If you have an airframe maxxed out by a Jett at 150 mph and 19,200 rpm on one flight, then the next flight you add the extension and drop down to 19,000 rpm...the difference in actual airspeed won't amount to very much. The drag of the extension might end up being more significant than the 200 rpm loss.

evan-RCU

But where did you get the numbers from? There may be some gidantic formula but I don't think it would be that simple and only .05mph.

smoknrv4

My Feedback: (11)

No I havn't taken a reading without the deflector, I'm sure there is a difference, but the deflector keeps alot of goop off the airframe.

MJD

My Feedback: (1)

I'm just guessing here, but I think ".05" was a metaphor for "something insignificant and not worth debate" as opposed to the literal value. But I could be wrong. Are you tuggin'` on CP's strings there Evan..? Or do east and west coasters talk in different tongues?

MJD

evan-RCU

Ohhhh....... a metafor or sinanimmmm.... one of those things.... hmmmm I'm just a model toy pilot.....

combatpigg

My Feedback: (3)

I pulled that number out of the air. I used TSAR [that sounds about right] engineering. It might actually be closer to .5 mph @ 200 less rpm, but I can't see how it could be noticable.
200 rpm is like when a cloud moves in front of the Sun. I'd get a little grumpy about losing 1000 rpm, then the little deflector would have to go. I've always thought they were a little bit gay......

MJD

My Feedback: (1)

Depends whether you point yours up or down.

Evan - it's a cimanmnim, like the stuff you srpinkle on toast and butter I think.

combatpigg

My Feedback: (3)

All done!

MJD

My Feedback: (1)

That's not stock! [X(]....

What is that, a .32 or a "'hopped up" .46?

Have you weighed it perchance?

MJD

combatpigg

My Feedback: (3)

......just havin' some fun, it's really a 1/2Aer with a CVA .15.

I'm not going any further with the SD until the servos arrive and also not going to finish the SD until I'm done with the "How Fast?" that is in this little delta.