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Search: Posts Made By: wjcalhoun
Showing results 1 to 25 of 500
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Forum: ARF or RTF
08-12-2014, 04:17 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Al is correct; the 17x6 will fly her well - to...

Al is correct; the 17x6 will fly her well - to about 65-68mph. The 15x10 gets about 9800rpm in the air (Eagletree monitor), and about 8600 on the ground at sea level.
You are also correct on the...
Forum: ARF or RTF
08-11-2014, 12:29 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Guys - think about the 15x10 as well; more speed,...

Guys - think about the 15x10 as well; more speed, more responsiveness. Still unlimited vertical on a well tuned DLE20
Bill
Forum: ARF or RTF
07-18-2014, 08:41 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Jeremy - looks great. Short, positive control...

Jeremy - looks great. Short, positive control linkages.
Forum: ARF or RTF
07-13-2014, 01:30 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Hi Al: I do have both the R70 and the R90. ...

Hi Al:
I do have both the R70 and the R90. Which i fly more is hard to quantify. I love the R90 for a relaxing day of 'sport' flying. The colors and patterning present well against most skies (in...
Forum: ARF or RTF
07-11-2014, 12:58 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Al: Sorry to here of the demise of your R70. ...

Al:
Sorry to here of the demise of your R70.
How long until the new one is flying?

BIll
Forum: ARF or RTF
07-01-2014, 06:18 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Hi Jeremy I don't know of an online calculator....

Hi Jeremy
I don't know of an online calculator.
RPM x pitch (in inches) / 12 (inches/ft) = feet per minute.
Divide that number by 5280 for miles per minute; multiply that result by 60 for miles...
Forum: ARF or RTF
06-30-2014, 04:32 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Teckbot - a couple of things: 1. The...

Teckbot - a couple of things:

1. The details are important when reporting speed. Are you talking straight and level, maintained speed, or max speed coming out of a dive? Is that a radar gun, or...
Forum: ARF or RTF
06-28-2014, 05:04 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

RoyR - sorry to hear about your loss. i think...

RoyR - sorry to hear about your loss. i think most of us recognize that most crashes are pilot error. i can count on the fingers of one hand the planes i have lost due to a mechanical, but of course...
Forum: ARF or RTF
06-19-2014, 04:08 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

welcome lean run warbird - the 50cc version...

welcome lean run

warbird - the 50cc version (R90) is really nice, but more tame than the R70. And the R70 is more tame than the R57 (I understand).
The R90 builds heavier than most 50cc...
Forum: ARF or RTF
06-13-2014, 11:13 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Roy R - I'm guessing that your #7459 was directed...

Roy R - I'm guessing that your #7459 was directed at me, so I'll respond. I'm not arguing, or picking on you, but I think you misrepresented the tone of the comments about modifications.

#1, we...
Forum: ARF or RTF
06-10-2014, 09:19 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Proline You obviously will decide for yourself,...

Proline
You obviously will decide for yourself, based on your flying style and aggressiveness how to set up your rudder and elevator. IMHO pull pull is probably the best solution for the R70 (like...
Forum: ARF or RTF
06-09-2014, 06:45 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Proline: Think about setting up the rudder as a...

Proline:
Think about setting up the rudder as a pull-pull, rather than a push rod. A 2-56 rod will have a lot of flex, and therefore a lot of imprecision controlling the rudder. If you are set on...
Forum: ARF or RTF
06-08-2014, 03:36 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Jim I build my R70 with dual aft mounted...

Jim
I build my R70 with dual aft mounted elevator servos; if you search my posts on this thread, you will find some pictures of the structure you will need to add to support the forces generated by...
Forum: ARF or RTF
06-07-2014, 12:05 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Proline: The stock R70 gear are swept back,...

Proline:
The stock R70 gear are swept back, bringing the main gear line (your 'pivot point') more towards the CG of the plane (more aft than the mount). The Dubro gear are straight, and will make...
Forum: ARF or RTF
06-07-2014, 08:07 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Hi Al; agree with you on the hinges. I think...

Hi Al; agree with you on the hinges. I think this airframe's potential for speed >110 mph, and the way many of us like to push it rules out CA hinges.

I have had two failures of Gorilla glue...
Forum: ARF or RTF
01-05-2014, 08:03 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Hey Mach2 Interesting idea, but can you imagine...

Hey Mach2
Interesting idea, but can you imagine trying to keep your eyes on YOUR R70, among a flock of two dozen, when they all are in original livery / colors?
Forum: ARF or RTF
12-04-2013, 10:00 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Robert I find that the DLE20 does dry out if it...

Robert
I find that the DLE20 does dry out if it has not run for a week or so. Mine takes 10 flips choke on before it pops if I have not flown for a few weeks. After that, starts quickly. At first...
Forum: ARF or RTF
11-28-2013, 11:09 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Why are you selling?

Why are you selling?
Forum: ARF or RTF
11-05-2013, 10:18 AM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

And, if you really want speed, this airframe...

And, if you really want speed, this airframe (with a bit of care with the build, reinforcements, and hardware selection) will hit 120 on a 12 pitch prop (DLE20). I have a 13.5 pitch prop ready to go...
Forum: ARF or RTF
10-24-2013, 03:31 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Hi Don Just busy with my primary job for the...

Hi Don
Just busy with my primary job for the past 6 weeks or so. The weather here is great for flying year round, so I do not have to squeeze all my flying time into the May-Sep window.

I really...
Forum: ARF or RTF
10-23-2013, 05:27 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

Al: Sorry to hear of your damage. I have so...

Al:
Sorry to hear of your damage. I have so far been fortunate with mine. My Eagle Tree system shows top speeds of around 120-122 mph in s/l flight turning about 9500 rpm on the DLE20 (APC 14x12)....
Forum: ARF or RTF
09-02-2013, 03:53 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

JH +1 on ahicks' and VR's comments. I...

JH
+1 on ahicks' and VR's comments.

I might add that it is useful to pick up a 2-56 die, and a 4-40 die. That way, you can cut rods exactly to the length you need, and thread the ends about 1/2...
Forum: ARF or RTF
08-01-2013, 03:41 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

RE: Larger Revolver

JH
2-56 hardware is generally OK.
You might try encasing the 2-56 rod with a carbon fiber tube. Rough up the rod with sandpaper or steel wool, and coat it with a light coat of 30 min epoxy. ...
Forum: ARF or RTF
08-01-2013, 01:32 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

RE: Larger Revolver

Wow - that is an OLD post.

I tried Power HD DS-120M servos in my R70#1. Within 7 flights three of 5 had failed, two in flight, and one in preflight check. Fortunately, the failures were...
Forum: ARF or RTF
07-30-2013, 04:50 PM
Replies: 8,173
Views: 876,411
Posted By wjcalhoun

RE: Larger Revolver

8pr

On the CG - get those twin elevator servos in aft! #1 The R70 flies better with the CG behind where the book suggests (YMMV), within limits, and #2 the aft servos do counterbalance the...
Showing results 1 to 25 of 500
 
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