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Search: Posts Made By: flybyjohn
Showing results 1 to 25 of 500
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Forum: Glow Engines
02-23-2017, 11:36 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

Thanks 1Qwksport2.5r, In looking at the design...

Thanks 1Qwksport2.5r, In looking at the design of the jett stream mufflers, I noticed that the sport mufflers are a bit longer than the racing mufflers. So I figure if I start a bit longer than...
Forum: Glow Engines
02-23-2017, 09:10 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

I suppose I have nothing to lose except a little...

I suppose I have nothing to lose except a little time to try to build a Jet stream type muffler. The least that could happen is I could gain more experience and maybe even get something that works...
Forum: Glow Engines
02-23-2017, 09:08 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

I suppose I am willing to agree with you on that...

I suppose I am willing to agree with you on that seeing that they advertise a 15-30% increase in power by bolting on a jet stream muffler on one page and 25-50% on another page.
Forum: Glow Engines
02-23-2017, 08:21 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

My numbers for the 12x8 are with the APC prop on...

My numbers for the 12x8 are with the APC prop on a .75 engine using 15% nitro. I would imagine that if this is advertised on the Jett Web Page that they would make sure they corrected a misprint of...
Forum: Glow Engines
02-22-2017, 01:23 PM
Replies: 34
Views: 9,255
Posted By flybyjohn

Doing a little research I found this claim on the...

Doing a little research I found this claim on the Jett site. It is kind of a little disappointing that they are only getting 12500 peak with an os 91 and 12x8 prop when my .75 is at 12250 with the...
Forum: Glow Engines
02-22-2017, 12:55 PM
Replies: 34
Views: 9,255
Posted By flybyjohn

double post again, not sure whats wrong.

double post again, not sure whats wrong.
Forum: Glow Engines
02-22-2017, 12:07 PM
Replies: 34
Views: 9,255
Posted By flybyjohn

I scaled a picture off a ultrathrust and jett...

I scaled a picture off a ultrathrust and jett sport muffler and they both are almost identical in size for the 61- 91 size muffler. They are both very close to the same shape at the rear end, and...
Forum: Glow Engines
02-22-2017, 12:06 PM
Replies: 34
Views: 9,255
Posted By flybyjohn

double post

double post
Forum: Glow Engines
02-21-2017, 11:09 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

Thanks for the suggestion. I was trying to...

Thanks for the suggestion. I was trying to duplicate the jett mufflers or ultrathrust mufflers but the metal was just too thin to get a deep enough bell.

I am going to try to make a tuned...
Forum: Glow Engines
02-21-2017, 07:38 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

Ok, after looking at the ultra thrust mufflers...

Ok, after looking at the ultra thrust mufflers and MVVS tuned mufflers and Jett Stream mufflers, I think that the plane will look a bit cleaner with just a tuned muffler instead of the long header...
Forum: Glow Engines
02-18-2017, 03:49 PM
Replies: 34
Views: 9,255
Posted By flybyjohn

http://www.rcuniverse.com/forum/attachment.php?att...

http://www.rcuniverse.com/forum/attachment.php?attachmentid=2201739http://www.rcuniverse.com/forum/attachment.php?attachmentid=2201741
I am thinking about using this engine combination on a...
Forum: Glow Engines
02-18-2017, 03:47 PM
Replies: 34
Views: 9,255
Posted By flybyjohn

I made up a new can with a little longer pipe...

I made up a new can with a little longer pipe attached. I used a 12/9 apc prop and cut 1/2 inch at a time( should have stuck with 1/4"). 1st cut got + 200 next cut another 200 next cut lost 150. Then...
Forum: Glow Engines
02-17-2017, 11:57 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

So would it be a good assumption then if the a...

So would it be a good assumption then if the a stub of pipe is already welded to the inlet of the can, that I would start cutting the header shorter, little by little while using one load prop higher...
Forum: Glow Engines
02-17-2017, 10:19 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

Does the length you are referring to mean the...

Does the length you are referring to mean the length from the end of the pipe to the back of the can or the length from the exhaust port to the back of the can?
Forum: Glow Engines
02-17-2017, 09:18 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

the long skinny can is about 10 inches long and...

the long skinny can is about 10 inches long and the short fat is about 7.5 inches long, the inside capacity of each can is almost the same measured after they were built.

I know what you mean by...
Forum: Glow Engines
02-17-2017, 08:21 AM
Replies: 34
Views: 9,255
Posted By flybyjohn

Mousse can logic?

I recently bought a tower hobbies .75 engine that needed agood cleaning but was still relatively tight at the top end. It did not have a muffler and mufflers forthat engine are hard to come by now...
Forum: Scratch Building, Aircraft Design, 3D/CAD
02-02-2017, 07:33 AM
Replies: 6
Views: 1,820
Posted By flybyjohn

I used Balsawoodinc.com for my last scratch...

I used Balsawoodinc.com for my last scratch build. Most of the wood was good, only a sheet or two of the 1/16" got wavy on me. The price was the best I could find on line at the time and they had...
Forum: Kit Building
01-31-2017, 09:09 AM
Replies: 4
Views: 1,019
Posted By flybyjohn

Thanks yankee. It feels pretty stretchy, kind of...

Thanks yankee. It feels pretty stretchy, kind of a rubbery feel.
Forum: Kit Building
01-30-2017, 08:19 PM
Replies: 4
Views: 1,019
Posted By flybyjohn

Well it must be older then the oldest modelers...

Well it must be older then the oldest modelers here. I will give it a test on some scraps and see just how it behaves.
Forum: Kit Building
01-26-2017, 09:47 AM
Replies: 4
Views: 1,019
Posted By flybyjohn

Kwik Cote?

I am getting ready to finish my ultra sport 60 and came across two rolls of this (Kwik Cote) in an old box of covering from an old modeler. I was thinking of using one of the rolls for some trim on...
Forum: Sport Flying
01-10-2017, 10:23 AM
Replies: 526
Views: 148,326
Posted By flybyjohn

I did just come across that and was wondering if...

I did just come across that and was wondering if it was a real ultra sport or something like the ultrasport plus they had a few years back.
Forum: Sport Flying
01-06-2017, 10:40 AM
Replies: 526
Views: 148,326
Posted By flybyjohn

While technically not an Ultra Sport, this Twin...

While technically not an Ultra Sport, this Twin that I scratch built was based off the Ultra Sport 60 wing plan. I have never flown a genuine US but if it flys anything like this twin, then I wont...
Forum: Tips & Techniques
12-28-2016, 06:01 AM
Replies: 0
Views: 553
Posted By flybyjohn

Fast curing silicone

This may have been posted before but thought I would share it as it has saved me a lot of money and time. If you want to make silicone couplers or silicone wing saddles or any other silicone product...
Forum: RC Pattern Flying
08-11-2016, 04:24 PM
Replies: 78
Views: 34,482
Posted By flybyjohn

I am sorry to hear about the MTK news. His...

I am sorry to hear about the MTK news. His information was very useful.

I will just keep a watch for anything coming apart on it like I was planning to.
Forum: RC Pattern Flying
08-11-2016, 10:26 AM
Replies: 78
Views: 34,482
Posted By flybyjohn

I recently made a couple small versions of the...

I recently made a couple small versions of the hyde mount for a twin engine scratch build that was just vibrating to holy heck. The engines were small (.36 asp 2 strokes) but the high speed...
Showing results 1 to 25 of 500
 
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