Search: Posts Made By: MJD
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Forum: "1/2 A" & "1/8 A" airplanes 06-29-2017, 10:33 AM
Replies: 30
Views: 1,106
Posted By MJD
Cheap ferrite motors with a lekkie prop adapter...

Cheap ferrite motors with a lekkie prop adapter and a piece of tubing shoved over the threads for a starter cone work pretty good for me - yes you have to cobble together a switch.

The TD .020 can...
Forum: Extreme Speed Prop Planes 06-09-2017, 08:03 AM
Replies: 148
Views: 14,266
Posted By MJD
That seems to be the case given the signature of...

That seems to be the case given the signature of the OP in post #1:

Advanced Composite Manufacturing (ACM)
Acmuav.com (http://www.acmuav.com)
rick@acmuav.com / bagostix@aol.com
Rick (BAGOSTIX)...
Forum: Extreme Speed Prop Planes 06-09-2017, 07:58 AM
Replies: 8
Views: 843
Posted By MJD
Hallo Michael - those are superb videos. There is...

Hallo Michael - those are superb videos. There is not much action on this forum right now, thank you for posting some real speed models.
Forum: Extreme Speed Prop Planes 06-05-2017, 07:16 AM
Replies: 8
Views: 524
Posted By MJD
Well, on richening from peak - on a regular can...

Well, on richening from peak - on a regular can muffler with no boost typically 300-400 rpm off peak, on "tuned mufflers" such as Jett, about 800rpm back will compensate for the rpm boost on...
Forum: Extreme Speed Prop Planes 04-22-2017, 10:23 PM
Replies: 11
Views: 431
Posted By MJD
The Profi has a tiny stub of a nv with a...

The Profi has a tiny stub of a nv with a screwdriver slot cut. On the RC bird I'll either lock the NV rich or plug the opening, and will use the remote only
Forum: Extreme Speed Prop Planes 04-21-2017, 08:36 PM
Replies: 11
Views: 431
Posted By MJD
The weekend is here and so I'll get someone to...

The weekend is here and so I'll get someone to hold the camera and film my feeble attempts to run this thing and keep it under control. Maybe I'll jump again when it gets up on step..

I found...
Forum: Extreme Speed Prop Planes 04-21-2017, 08:23 AM
Replies: 11
Views: 431
Posted By MJD
Left hand on the NV, right hand trying to stay in...

Left hand on the NV, right hand trying to stay in control - sounds like good fun to me. With needle on the throttle stick it is kind of intuitive. Lean - forward, Rich - back, Kill - all the way...
Forum: Extreme Speed Prop Planes 04-21-2017, 06:49 AM
Replies: 11
Views: 431
Posted By MJD
I maintain that the potential top speed for any...

I maintain that the potential top speed for any engine is higher for an RC model than C/L - indeed, the lines are massive drag. The F3 speedcup results speak to that.

The D06 is built for...
Forum: Extreme Speed Prop Planes 04-19-2017, 07:28 PM
Replies: 46
Views: 2,154
Posted By MJD
Not exactly the same engine, but I need to get my...

Not exactly the same engine, but I need to get my old Bluehead X.45 on the stand and get it broken in, then set up on a quiet pipe. The small amount I ran it I recall it having some muscle at least...
Forum: Extreme Speed Prop Planes 04-19-2017, 04:02 PM
Replies: 11
Views: 431
Posted By MJD
BTW the engine is destined for an Avionik D06,...

BTW the engine is destined for an Avionik D06, with the from of the speed pan grafted into the nose, inverted, with cowl:

http://www.icare-rc.com/photos/avionikd-05.jpg
Or if I never do that,...
Forum: Extreme Speed Prop Planes 04-19-2017, 04:00 PM
Replies: 11
Views: 431
Posted By MJD
Well, I think I've read that the hp to turn a...

Well, I think I've read that the hp to turn a given prop within nominal conditions increases as the cube of the rpm? Not sure but if the lift goes up with V^2 it is at least that. 37/31^3 is 70%...
Forum: Extreme Speed Prop Planes 04-18-2017, 06:47 PM
Replies: 46
Views: 2,154
Posted By MJD
Thanks to daylight savings time finally… I...

Thanks to daylight savings time finally… I booted home, broke free to the workshop and finished getting the Profi 15 ready to bench run. I just did a little short run on the deck, and it was mind...
Forum: Extreme Speed Prop Planes 04-18-2017, 03:19 PM
Replies: 11
Views: 431
Posted By MJD
Profi 2014 F2A first run

Just a teaser run in the evening on the deck, since I had just finished getting it attached to the test stand.. I had to use the speed pan and some fasteners but finally got it figured out. Put a...
Forum: Extreme Speed Prop Planes 04-18-2017, 06:01 AM
Replies: 46
Views: 2,154
Posted By MJD
Makes sense I guess.. once you start matching the...

Makes sense I guess.. once you start matching the timing, porting, etc, in the end you are left with the displacement. "Ain't no substitute for cubes", a phrase prone to misinterpretation - but with...
Forum: Extreme Speed Prop Planes 04-16-2017, 05:33 PM
Replies: 46
Views: 2,154
Posted By MJD
Of course - they were and are fine engines,...

Of course - they were and are fine engines, there's no question about that. My point refers more to the stream of ludicrous claims that have surfaced here over the years, with a high percentage being...
Forum: Extreme Speed Prop Planes 04-16-2017, 01:39 PM
Replies: 46
Views: 2,154
Posted By MJD
At least the rpm claims aren't about a Rossi...

At least the rpm claims aren't about a Rossi engine, that's a refreshing change. I do tend to forget that 25-30 year old Rossi sport engines still turn 2-3000 rpm faster than any modern high...
Forum: Extreme Speed Prop Planes 04-11-2017, 04:42 AM
Replies: 29
Views: 1,455
Posted By MJD
I checked the RCCanada classifieds -and found a...

I checked the RCCanada classifieds -and found a "wanted" ad for one..:p
Forum: "1/2 A" & "1/8 A" airplanes 04-10-2017, 09:40 AM
Replies: 248
Views: 23,294
Posted By MJD
Due to local availability, my favorite two fuel...

Due to local availability, my favorite two fuel options are SIG Champion in quarts + oil if wanted/needed, or O'Donnell car fuel with 8% oil and castor added to taste. I shoot for 22-23% total oil,...
Forum: Extreme Speed Prop Planes 04-10-2017, 09:36 AM
Replies: 29
Views: 1,455
Posted By MJD
This might be a bit short.. maybe if you had a...

This might be a bit short.. maybe if you had a muffler stack extension..

http://www.top-flite.com/accys/topq7915.html

Manufacturer Stock# TOPQ7920 ...
Forum: RC Jets 04-06-2017, 12:27 PM
Replies: 280
Views: 14,212
Posted By MJD
Looks like the model size version of the wireless...

Looks like the model size version of the wireless digital scale setup to do weight and balance on full size light aircraft. Makes perfect sense.
Forum: RC Jets 04-06-2017, 08:14 AM
Replies: 280
Views: 14,212
Posted By MJD
CG Wizard? Shouldn't that be in the control line...

CG Wizard? Shouldn't that be in the control line section? :rolleyes:

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSD2KGZgpVDNj8F2zGQLOdRfrIf79fVFNg0KyE0idXmQ0ielY3_fA


Ha ha. All...
Forum: Batteries & Chargers 04-05-2017, 01:50 PM
Replies: 19
Views: 1,141
Posted By MJD
The almost nil to very low self discharge rates...

The almost nil to very low self discharge rates are indeed a thing of beauty.

On the flip side, I won't hesitate to stuff an oversized NiCd or NiMH in the front of a larger tail heavy airplane if...
Forum: Batteries & Chargers 04-04-2017, 12:32 PM
Replies: 19
Views: 1,141
Posted By MJD
In other similar discussions it seems to boil...

In other similar discussions it seems to boil down to this every time: people who are comfortable with NiMH packs, understand them and have good luck with them, don't really have a compelling reason...
Forum: Extreme Speed Prop Planes 04-04-2017, 07:51 AM
Replies: 29
Views: 1,455
Posted By MJD
You're right. Have I gone all soft and compliant...

You're right. Have I gone all soft and compliant and full of the milk of human kindness all of a sudden? I'll call the doctor..
Forum: Extreme Speed Prop Planes 04-04-2017, 07:09 AM
Replies: 29
Views: 1,455
Posted By MJD
An interesting comparison would also be open...

An interesting comparison would also be open exhaust rpm against the piped rpm. i.e. does it just gain back the loss or is ther emore?
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