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Search: Posts Made By: AlexF
Showing results 1 to 25 of 52
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Forum: Q-500 Racing
12-12-2005, 02:02 PM
Replies: 12
Views: 1,563
Posted By AlexF

RE: Viper Engine Question

Any .46 will make it a fast sport plane -- 120 or maybe faster if you play with props. I suspect you'll get diminishing returns with a sport .60 because they tend to be lowish rpm, but it would be...
Forum: Aerodynamics
09-04-2005, 11:12 AM
Replies: 30
Views: 4,047
Posted By AlexF

RE: Trimming For Landing

Could it be that the plane would fly better with a little more downthrust or tailweight? I'd expect either to reduce your trim change -- worth a shot if you haven't tried it yet, maybe.
Forum: Kit Building
08-14-2005, 01:03 PM
Replies: 5
Views: 536
Posted By AlexF

RE: ailerons space

I'd go with bottom since it'll look better :D 1mm is a small gap; don't sweat it.
Forum: Aerodynamics
08-14-2005, 02:26 AM
Replies: 12
Views: 6,783
Posted By AlexF

RE: Tapered vs Constant Chord wings and wing loading??

gah, looks like I didn't have my calculator gadget doing the right number of decimal places. Dunno how you get the trainer-like though, mine loved to drop wingtips.
08-14-2005, 02:11 AM
Replies: 4
Views: 529
Posted By AlexF

RE: Servo noise what do you think?

Are you by chance using a 6v battery?
Forum: Beginners
08-14-2005, 02:06 AM
Replies: 23
Views: 1,630
Posted By AlexF

RE: Help starting a Webra .50

I've never had an engine that would freewheel through tdc even without a glowplug. Could be this one's different though..
Forum: Beginners
08-10-2005, 06:34 PM
Replies: 9
Views: 812
Posted By AlexF

RE: Minimizing control surface throw

To summarize: if you want to reduce throw and you have the choice of moving out on the horn or in on the servo arm, you move out on the horn to reduce slop. If that's not enough reduction well,...
Forum: Beginners
08-10-2005, 12:43 PM
Replies: 35
Views: 1,916
Posted By AlexF

RE: My First Instructing Job HELP!!!

That's a good point too. Sometimes in the beginning stages, especially with kids, it helps to say something like "push the stick to the right".

But I was noting that kids and even adults will...
Forum: Beginners
08-10-2005, 12:26 PM
Replies: 35
Views: 1,916
Posted By AlexF

RE: My First Instructing Job HELP!!!

One point: at most places I've flown it's understood that if something happens to your plane while an instrutor is flying it or instructing you, it's your loss. This is intuitive when the instructor...
Forum: Beginners
08-08-2005, 09:52 AM
Replies: 23
Views: 1,630
Posted By AlexF

RE: Help starting a Webra .50

If you're using one of the cross glow plug wrenches (the ones with four tips for different sized plugs, of which you only ever use one) you can crank down fairly hard on it. Still, I doubt being...
Forum: Beginners
07-28-2005, 10:17 AM
Replies: 9
Views: 653
Posted By AlexF

RE: Wing hinge installing

you need "foam safe" or "oderless" CA. The regular stuff melts foam, as you noticed [8D]
Forum: Aerodynamics
07-27-2005, 04:48 PM
Replies: 28
Views: 3,689
Posted By AlexF

RE: Winglets

I'd imagine that they slow your roll rate simply because they're extra weight at the end of your wing (which the ailerons then have to accelerate in order to create a roll). So keep them light [8D]
Forum: Aerodynamics
07-27-2005, 04:43 PM
Replies: 6
Views: 753
Posted By AlexF

RE: What exactly are Flaps used for

I've got a ducted fan sport model called a Renegade. I've always landed it with flaps down, but at first it only had around 25 or 30 degrees throw on them. I had a lot of trouble with overshooting...
Forum: Q-500 Racing
07-22-2005, 08:35 AM
Replies: 12
Views: 1,563
Posted By AlexF

RE: Viper Engine Question

A 9x6 at 16-17000 rpm flys them at 110 to 120mph; I'd expect you to get faster than that, particularly if spend a little time trying different props.
Forum: Q-500 Racing
07-21-2005, 03:59 PM
Replies: 2
Views: 533
Posted By AlexF

RE: Q-500 radio gear?

typically the "mini" size, 30 to 40 inch ounces is plenty if it's a V tail. They don't really need anything special. Receiver is whatever you got. Obviously lighter is better but probably not...
07-21-2005, 12:35 PM
Replies: 10
Views: 1,092
Posted By AlexF

RE: Cermark F-16 Engine

I used the McCoy MC9 plugs on OS .91s in ducted fan units for a long time. I think the last time I popped one in flight was more than 200 flights ago (ran way too lean), but I do toss them after 10...
Forum: Beginners
07-18-2005, 04:13 PM
Replies: 33
Views: 2,205
Posted By AlexF

RE: Bigger wheels or smaller prop?

You're right that a lower pitch should slow it down somewhat at idle, but there won't be a huge difference. Keep your high end needle rich if you try the 11x4; I think it's going to rev the .46...
07-14-2005, 11:53 PM
Replies: 11
Views: 979
Posted By AlexF

RE: Patriot Dicontinued again!!??

Is 13000 on a 10x6 not a bit sluggish for a .46? I thought the master airscrew 10x6 was supposed to be on the light side too. Maybe something is wrong with your engine. If you're happy with the...
Forum: Beginners
07-14-2005, 11:28 PM
Replies: 23
Views: 1,630
Posted By AlexF

RE: Help starting a Webra .50

I'd start by trying new fuel and glowplug; no need to introduce more variables. I've definitely had cases where a glow plug glows, but doesn't run right. Also, if you leave a sealed plastic...
07-11-2005, 12:06 AM
Replies: 11
Views: 842
Posted By AlexF

RE: Which plane as in introduction to speed ?

lanier makes a Dominator, which is competitive: http://www.lanierrc.com/lrcprivate/rcairplanes/dom.htm . There's a short list of kits here:...
07-10-2005, 08:24 PM
Replies: 11
Views: 842
Posted By AlexF

RE: Which plane as in introduction to speed ?

Any Q500 (quickie) plane will go 110 to 120 with a sport .40 (I raced in a class with thundertiger .40 only). Kits should be around $50 and you need 4 servos, preferably "minI" (not micro) but you...
Replies: 6
Views: 494
Posted By AlexF

RE: control feel

Getting your thows right is the easiest and most noticeable thing to do. It drives me nuts to fly a plane with throws out from where I think they should be. If your plane is somewhat fast, give...
Forum: Beginners
07-08-2005, 11:59 AM
Replies: 4
Views: 529
Posted By AlexF

RE: Help how to set up vtail airplane

Be sure to keep it nice and light -- Q500s are fairly difficult to land (and this thread is in the Beginner's forum so..) Don't worry about it too much -- just be prepared to go around a few times...
Forum: Aerodynamics
07-04-2005, 05:37 PM
Replies: 7
Views: 962
Posted By AlexF

RE: Twin speed plane : faster or not ?

There was a twin jett .50 flying wing plane in the extreme speed section: http://www.rcuniverse.com/forum/m_2557430/mpage_1/key_/tm.htm

It ended up doing 150 or so, which was a bit slow for what...
Forum: Beginners
07-02-2005, 11:28 AM
Replies: 2
Views: 377
Posted By AlexF

RE: A REAL BALANCING PROBLEM

No magic to it -- draw a line between the balance points at the tips and where it intersects the wing saddle is the balance point at the root (obviously). The manufacturer might give a measurement...
Showing results 1 to 25 of 52
 


 
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