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Search: Posts Made By: Theuns
Showing results 1 to 21 of 21
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Forum: RC Scale Aircraft
03-16-2018, 05:47 AM
Replies: 2
Views: 692
Posted By Theuns

Sig 1/4 J-3 Refurb

I rebuitl a client's full size J-3 a few years back , he is an airshow pilot that lands ontop of a pickup truck with his cub, a friend asked me to refurb his 1/4 Sig in the same scheme.

Here are...
Forum: RC Jets
10-26-2017, 08:22 PM
Replies: 35
Views: 5,572
Posted By Theuns

Thanx for the advice, will keep it in mind :-) ...

Thanx for the advice, will keep it in mind :-)

Theuns
Forum: RC Jets
10-26-2017, 07:15 AM
Replies: 35
Views: 5,572
Posted By Theuns

I had a few prop driven deltas i n the past an...

I had a few prop driven deltas i n the past an all of them had a tendancy to want to "skid' and mush out of a sharp high G turn, that do however have a nice quality of being able to fly at much higer...
Forum: RC Jets
10-25-2017, 08:51 AM
Replies: 35
Views: 5,572
Posted By Theuns

I think what I will do is to just put the FOD...

I think what I will do is to just put the FOD screen on and run it down the raunway to see what happens, I think maybe I am close enough with the static thrust to attempt a flight after some high...
Forum: RC Jets
10-25-2017, 04:42 AM
Replies: 35
Views: 5,572
Posted By Theuns

The latest static test now shows an imporved...

The latest static test now shows an imporved thrust of 3,5 kg (7.7 lb) and the engine is not making the same super banshee scream, although it still sounds like it is running at full designed RPM....
Forum: RC Jets
10-24-2017, 09:57 AM
Replies: 35
Views: 5,572
Posted By Theuns

Well. here is the latest. I made the tube...

Well. here is the latest.
I made the tube uotlet to be 98mm in diameter amd I cut a slot in the wedge basically removing the rounded lip at the back.
I did this so I could install a sharpedged...
Forum: RC Jets
10-23-2017, 08:16 PM
Replies: 35
Views: 5,572
Posted By Theuns

I removed the setup again and made this splitter...

I removed the setup again and made this splitter plate from .0025" Alclad.
It is not the nicest looking or best fitting unit but I am sure it should stop the turbulance and hopefully direct the air...
Forum: RC Jets
10-23-2017, 04:49 AM
Replies: 35
Views: 5,572
Posted By Theuns

hI Art, thanx for the info. I concur wrt the...

hI Art, thanx for the info.
I concur wrt the outlet size.
I just ran the setup with the 85mm tube now, I bought a digital fish pull scale and it also showed 1,8 kg of static (3.9 lB)
I will now...
Forum: RC Jets
10-22-2017, 08:33 PM
Replies: 35
Views: 5,572
Posted By Theuns

Thanx, the length of the intakes are set by the...

Thanx, the length of the intakes are set by the location of the engine, if I move away from this it will affect the CG and I really dont want to put unnessesary ballast on as I think this model will...
Forum: RC Jets
10-22-2017, 10:05 AM
Replies: 35
Views: 5,572
Posted By Theuns

Shaun, a mate gave me this setup that was in his...

Shaun, a mate gave me this setup that was in his old F-4 so I dont really know the history of it but the bearings feel glld, not tight and sandy, the piston has slight heat marks on it but no glazing...
Forum: RC Jets
10-22-2017, 08:27 AM
Replies: 35
Views: 5,572
Posted By Theuns

I also fly at hot and high elevation, usually...

I also fly at hot and high elevation, usually round 30 deg C at 5800'
3.75" otlet brings me back to the original 95mm outlet I first had, I will try get an acurate fish scale to compare the tubes.
...
Forum: RC Jets
10-22-2017, 07:17 AM
Replies: 35
Views: 5,572
Posted By Theuns

The engine leans out well on the mixture...

The engine leans out well on the mixture controll, I will start on a rich setting and then lean it out till just before it leans to much so as for fuel supply I am getting the max I can. The throttle...
Forum: RC Jets
10-22-2017, 02:47 AM
Replies: 35
Views: 5,572
Posted By Theuns

I ran a 85mm exit tube now, it only read 1900 gr...

I ran a 85mm exit tube now, it only read 1900 gr on the scale but the thrust on my hand at the back felt quite a bit more than with the 95mm tube, the smaller tube also sucked my hand onto the intake...
Forum: RC Jets
10-21-2017, 10:52 PM
Replies: 35
Views: 5,572
Posted By Theuns

Hi Matt, I have no idea, I cant get a taco in to...

Hi Matt, I have no idea, I cant get a taco in to see, I know however it must be very close to "max" by the sound of it , I understand it is not a acurate way but it is defenately revving way more...
Forum: RC Jets
10-21-2017, 09:23 PM
Replies: 35
Views: 5,572
Posted By Theuns

Guys sorry I should have posted pix of the actual...

Guys sorry I should have posted pix of the actual duckting.
Yes it has full ducting from the intakes , arrounnd the engine and all the way to the exit. I tried to make this a smooth as I could.
It...
Forum: RC Jets
10-21-2017, 06:28 AM
Replies: 35
Views: 5,572
Posted By Theuns

Hi Matt Just checked it now, radius on...

Hi Matt

Just checked it now, radius on intake lip about 1/8" diameter and area is 100% that of FSA.

Theuns
Forum: RC Jets
10-20-2017, 10:01 PM
Replies: 35
Views: 5,572
Posted By Theuns

BVM thrust issues

Hi All.
I have a BVM .91 ICDF with viofan I have in my Mirage 3.
I am strugling to get a good static thrust on this setup, the engine screams like a banshee so I think that part is OK but the...
Forum: Flybarless Helicopters
08-11-2015, 07:30 AM
Replies: 1
Views: 4,503
Posted By Theuns

Hi Mods, I got sorted. Could you delete this...

Hi Mods, I got sorted.

Could you delete this post please.

Thanx

Theuns
Forum: Flybarless Helicopters
08-02-2015, 09:12 AM
Replies: 1
Views: 4,503
Posted By Theuns

Robird G31 question

Hi all.
I recently got hold of a Robird G31 FBL unit and have a few questions please....I know basically nothing about FBL stuff.

It had something loose in the case and when I opened it I found...
Forum: Airplanes - Full Scale
04-19-2011, 09:55 AM
Replies: 594
Views: 151,113
Posted By Theuns

RE: Full scale flyers....roll call.

Hi guys.
I am Theuns and live/work in South Africa/Joannesburg
I rebuild and re-cover classic fabric planes for a living and fly my Piper L-18c I built and painted in the colours of the U.S. ARMY...
Forum: RC Gliders, Sailplanes and Slope Soaring
04-17-2011, 09:28 AM
Replies: 0
Views: 1,089
Posted By Theuns

Robbe ASW 19

Hi all, I'm new to this forum and hope you guys may be able to help me please.

Istarted my RC 'ing 23 years ago with the good old Gentle lady thing and now rebuild full size clsassic planes to pay...
Showing results 1 to 21 of 21


 
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