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Search: Posts Made By: TXKflier
Showing results 1 to 25 of 80
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Forum: RC Warbirds and Warplanes
11-30-2016, 10:16 PM
Replies: 1,681
Views: 453,628
Posted By TXKflier

Never mind..

Never mind..
Forum: Extreme Speed Prop Planes
04-25-2014, 10:22 PM
Replies: 279
Views: 40,386
Posted By TXKflier

I repaired the nose by taping it all back...

I repaired the nose by taping it all back together and adding a layer of glass cloth and epoxy to the inside. I also replaced the O.S. .61 with a Magnum .91 and a Jett muffler..
...
Forum: Extreme Speed Prop Planes
04-25-2014, 08:19 PM
Replies: 279
Views: 40,386
Posted By TXKflier

From the Cermark F-18P manual.. SETTING THE...

From the Cermark F-18P manual..

SETTING THE CONTROL THROWS

Use the following control travels as a starting point
Ailerons: LOW RATE = 5/8” up and down, HIGH = 7/8”
Stabilators...
Forum: Extreme Speed Prop Planes
05-05-2013, 06:28 PM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

Sorry, but increasing the voltage by 25% also increases the current draw by 25%. Ohm's Law says so. You should increase the battery capacity by 25% to make up for the extra current draw.
Forum: Extreme Speed Prop Planes
11-09-2012, 03:53 AM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

I think you meant to say "It wouldn't hurt.."

;-)
Forum: Extreme Speed Prop Planes
11-07-2012, 07:13 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

Actually, Rick's earlier posts were correct when he said the CG should be 7.5 inches. He did mess up on the one just before mine.

You need to make the initial flights at 7.5 inches. When you...
Forum: Extreme Speed Prop Planes
10-08-2012, 03:18 PM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

That 12x5 prop explains why it wasn't going as fast as I thought it should have been. Also, the rpm's weren't as high as I would have expected on an 11x6. The in-flight rpm I calculated from the...
Forum: Extreme Speed Prop Planes
10-07-2012, 07:35 PM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

http://www.youtube.com/watch?v=3L5v5GEnIQc

Using the doppler frequencies I've measured in the video above, I estimate its ground speed to be about 100 mph. The approaching frequency is about...
Forum: Extreme Speed Prop Planes
09-11-2012, 05:44 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

My Cermark F-18 and F-16 V3 prop jets both came with air up/air down retracts.
Forum: Extreme Speed Prop Planes
07-29-2010, 10:22 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

Yeah, that looked pretty sluggish alright. It would have been nice if I could have heard the engine instead of that crappy, loud music..
Forum: Extreme Speed Prop Planes
07-26-2010, 08:04 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

Sounds to me like you have a crappy OS 91FX. A 13x8 or 13x9 will load the motor more and turn less rpm than the 12x8; therefore, you will go slower. Try less diameter and/or more pitch. Put a tach...
Forum: Extreme Speed Prop Planes
02-19-2010, 12:57 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

Ah, now I know why your engine didn't sound like a Jett 90LX in your video. It's that 13x10 prop! According to Jett's website, your engine has the shorter muffler and higher port timing. It...
Forum: Extreme Speed Prop Planes
07-03-2009, 07:23 PM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

Set the low speed needle for a reliable idle. After letting it idle for 15-30 seconds, open the throttle. If it hesitates, but sounds smooth, it's too lean. Open the idle needle a little and try...
Forum: Extreme Speed Prop Planes
07-03-2009, 08:43 AM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

It sounded too lean to me during takeoff. Set the high speed needle for max rpm with the plane sitting on the ground and then back it out a little (maybe an 1/8 of a turn). Then pick the plane up...
Forum: Extreme Speed Prop Planes
06-28-2009, 11:42 AM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

Looks pretty nice. Reminds me of the T-38's they used to fly.

I'd cut the control horn screws off with dikes and file them down flush.. ;-)
Forum: Extreme Speed Prop Planes
04-14-2009, 08:52 PM
Replies: 831
Views: 146,029
Posted By TXKflier

RE: PHOENIX MODELS F-20 TIGERSHARK ?

You might try an APC 10x7 Sport prop. I've read they appear to have a little more pitch than a Master Airscrew prop of the same size. Or, perhaps it's because they're more rigid and hold their...
Forum: Extreme Speed Prop Planes
07-07-2008, 06:20 AM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

Which flight sim and/or plane?

Thanks,
Lynn
Forum: Extreme Speed Prop Planes
06-04-2008, 06:56 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

What brand and style of 12x8 are you running? Not all 12x8's are created equal..
Forum: Extreme Speed Prop Planes
05-21-2008, 06:17 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

The cheap way out is to put a Magnum .91 two stroke in it. They're about $130..
Forum: Extreme Speed Prop Planes
05-18-2008, 08:25 PM
Replies: 279
Views: 40,386
Posted By TXKflier

RE: CERMARK F-18 HORNET, BUILT IT BETTER, STRONGER, AND FASTER!

My Cermark F-18 does strange things when I give it top rudder during knife-edge. I would never attempt to spin it, even though Cermark says it will. In my opinion, the rudders might as well be...
Forum: Extreme Speed Prop Planes
03-05-2008, 06:34 PM
Replies: 279
Views: 40,386
Posted By TXKflier

RE: CERMARK F-18 HORNET, BUILT IT BETTER, STRONGER, AND FASTER!

Back before FM radios came along, it was absolutely necessary to avoid metal-to-metal contact in control linkages. The RFI from the metal parts rubbing together would kill an AM radio. Today's FM...
Forum: Extreme Speed Prop Planes
03-05-2008, 07:34 AM
Replies: 279
Views: 40,386
Posted By TXKflier

RE: CERMARK F-18 HORNET, BUILT IT BETTER, STRONGER, AND FASTER!

My stabs have maybe a 1/16" of wiggle in them at neutral. I haven't noticed any flutter; however, I balanced my stabs using a Dubro prop balancer. I used Z bends at the servo wheel and ball links...
Forum: Extreme Speed Prop Planes
02-23-2008, 03:30 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

I would fill the holes in the mounts with hardwood dowels and drill new holes. A friend of mine cut a couple strips of aluminum, drilled and tapped holes for the engine mounting screws, and...
Forum: Extreme Speed Prop Planes
02-23-2008, 11:02 AM
Replies: 279
Views: 40,386
Posted By TXKflier

RE: CERMARK F-18 HORNET, BUILT IT BETTER, STRONGER, AND FASTER!

I haven't had any problems with them..
Forum: Extreme Speed Prop Planes
02-21-2008, 10:52 PM
Replies: 1,919
Views: 277,876
Posted By TXKflier

RE: THE NEW CERMARK F-16 BUILD IT BETTER, STRONGER, AND FASTER!!!

No problem here. We're just having a healthy discussion... :D

I've actually been convinced to mount remote needles on the firewall, something I probably wouldn't have tried on my own.

...
Showing results 1 to 25 of 80
 
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