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Search: Posts Made By: jrf
Showing results 1 to 25 of 88
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Forum: Kit Building
10-02-2020, 09:36 PM
Replies: 3,198
Views: 364,753
Posted By jrf

Smile Those two are the ones I remember best. I have...

Those two are the ones I remember best. I have done a couple of twin engine Super Sportsters, but no Ultra Sports. I would recommend that you increase the wing span by one bay on each end and...
Forum: Kit Building
10-02-2020, 01:34 PM
Replies: 3,198
Views: 364,753
Posted By jrf

It's been a lot of years and a lot of projects...

It's been a lot of years and a lot of projects since then. The RCM article was published in 1989 and Great Planes kitted it right after that. The 40 and 60 plans and kits are fine as is. The 1000...
Forum: Kit Building
10-02-2020, 07:08 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Plans verses kit

The RCM plans for the US 60 are identical to the kit except for the method used to sheet the sides of the turtle deck. The US 1000 plans are identical to the kit except that the kit added one wing...
Forum: Kit Building
09-06-2018, 03:00 PM
Replies: 3,198
Views: 364,753
Posted By jrf

Depends on how you describe performance. Level...

Depends on how you describe performance. Level flight top speed? Acceleration and vertical penetration? Usable speed range? Results are heavily dependent on the prop you use on each engine and how...
Forum: Kit Building
04-19-2018, 09:09 AM
Replies: 3,198
Views: 364,753
Posted By jrf

It's the heat that make it leave the color. You...

It's the heat that make it leave the color. You will have much less of a problem if you remove the old covering without heat. (More work, but worth it.)
Forum: Kit Building
02-12-2018, 11:15 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Lengthening the main gear has the effect of...

Lengthening the main gear has the effect of moving the wheels forward with respect to the CG and also increases the wing's angle attack when on the ground. You might get away with it if you fly from...
Forum: Kit Building
02-12-2018, 08:21 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Excellent choice. You will need to use a 3 blade...

Excellent choice. You will need to use a 3 blade prop for ground clearance, but those look and sound so cool, that will make it even better.

Jim
Forum: Kit Building
07-10-2017, 09:06 AM
Replies: 3,198
Views: 364,753
Posted By jrf

With regard to rudder/aileron coupling, yes, the...

With regard to rudder/aileron coupling, yes, the high rudder on the Ultra Sport causes the airplane to roll away from the direction of rudder input. This is a common problem with low wing aircraft. ...
Forum: Kit Building
07-10-2017, 08:49 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Once again, let me say that you can set up your...

Once again, let me say that you can set up your plane any way you want to. But for reference, in simple terms, here is the reason for the dihedral.

We want an aerobatic airplane to be neutral in...
Forum: Kit Building
07-08-2017, 01:13 PM
Replies: 3,198
Views: 364,753
Posted By jrf

I just re-checked the instructions on the US 60...

I just re-checked the instructions on the US 60 kit. I calls for 1 1/8" dihedral under each tip. If you do that the top of the wing is definitely not flat.

The original design of the Kaos and the...
Forum: Kit Building
05-08-2017, 01:23 PM
Replies: 3,198
Views: 364,753
Posted By jrf

Some of the posters on RCG have said that the new...

Some of the posters on RCG have said that the new GP Ultrasport also has no dihedral. A close look at the photos on Tower's website seems to verify that. Maybe camss69 can tell us if it is true.
Forum: Kit Building
05-08-2017, 09:36 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Dihedral

I have heard that the new one does not have any dihedral. It should. The dihedral that was included in the original made it a much more hands-off flyer.
Forum: Kit Building
02-06-2017, 08:42 AM
Replies: 3,198
Views: 364,753
Posted By jrf

The clipped wing version of the 1000 is the...

The clipped wing version of the 1000 is the original design. The kit offered the long wing to make it IMAA legal, but it doesn't fly as well as the original and it is harder to land (the flaps work...
Forum: Kit Building
11-28-2016, 11:03 AM
Replies: 3,198
Views: 364,753
Posted By jrf

The Evolution 20 has the same power as a .91 two...

The Evolution 20 has the same power as a .91 two stroke glow. The 26 might get you about the same performance as the 1.20 four stroke that you have in it now.
Forum: Kit Building
07-08-2016, 01:58 PM
Replies: 3,198
Views: 364,753
Posted By jrf

It is called a tuned pipe because it is tuned to...

It is called a tuned pipe because it is tuned to a certain rpm range. Most pipes are tuned to high rpm. That means that the engine will run better (faster) at that rpm. It also means that the...
Forum: Kit Building
07-05-2015, 12:33 PM
Replies: 3,198
Views: 364,753
Posted By jrf

To use any kind of rigid hinges or a latch, you...

To use any kind of rigid hinges or a latch, you would have to build a frame for the canopy. Just use a piece of high tac tape (Monokote trim sheet?) along one side, and screws on the other side. ...
Forum: Kit Building
05-20-2015, 08:43 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Assuming the optimum prop for each engine, the...

Assuming the optimum prop for each engine, the Moki would be the fastest. The DA the slowest and the big 4 strokes in between.

Bear in mind, with a speed prop on any of those engines, the...
Forum: Kit Building
05-15-2015, 07:27 AM
Replies: 3,198
Views: 364,753
Posted By jrf

You seem to have done an adequate fix for the...

You seem to have done an adequate fix for the problem, and once the wing is closed, no one will see it. I've never built a kit that didn't have some kind of glitch. It's part of the building...
Forum: Kit Building
03-19-2015, 11:04 AM
Replies: 3,198
Views: 364,753
Posted By jrf

That's because we're talking about a US1000.

That's because we're talking about a US1000.
Forum: Kit Building
02-12-2015, 09:41 AM
Replies: 3,198
Views: 364,753
Posted By jrf

No, that is not correct. The sheeting should be...

No, that is not correct. The sheeting should be glued to the formers, leaving a part of the sides to be sanded off for a nice smooth transition. If you glue the sheeting to the edge of the sides...
Forum: Kit Building
02-06-2015, 08:57 AM
Replies: 3,198
Views: 364,753
Posted By jrf

The important part is to follow the outline of...

The important part is to follow the outline of the top view of the fuselage shown on the plans. Yes, it can be difficult to bend the sides in. Soaking them with water/alcohol first helps.
Forum: Kit Building
02-06-2015, 08:55 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Double post.

Double post.
Forum: Kit Building
02-05-2015, 04:04 PM
Replies: 3,198
Views: 364,753
Posted By jrf

To maintain the smooth curve to the spinner. If...

To maintain the smooth curve to the spinner. If you don't mind the bulges that will cause behind the spinner, leave it as is.

Jim
Forum: Kit Building
12-31-2014, 09:12 AM
Replies: 3,198
Views: 364,753
Posted By jrf

First draw a guideline along the center of the...

First draw a guideline along the center of the trailing edge so that you can sand it evenly and smear some pencil lead along the top and bottom at the leading edge to make sure you don't sand into...
Forum: Kit Building
12-30-2014, 11:08 AM
Replies: 3,198
Views: 364,753
Posted By jrf

Tapering them makes the airplane fly steadier and...

Tapering them makes the airplane fly steadier and smoother when the are controls centered. Rounding them makes it hunt when the controls are centered. A good compromise is to not taper them and NOT...
Showing results 1 to 25 of 88
 
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