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Sipa 200 (June 2015 RCM&E)

A Mini Jet

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Stephen Jones23/12/2010 20:31:38
2878 forum posts
1656 photos
Hi fellow wood worms ,
I have started a build and Design project to keep me busy over the cold winter months . Not sure if anyone has built a radio controlled model of this type before and as i like the shape of the fuselage i thought id give it a go .
Its a two part project as i intend to build a small 24" model 1St as a gentle flyer for summer and a Larger 36" model for faster flying .
Here are some pictures of where i am at the moment .
The start of the small 24" model , the Fuselage 

A vac formed canopy would be nice .

Not so bad me thinks
A nice size hatch to gain access to radio gear .

I was going to put a small ducted fan in but now decided on a pusher 
prop instead . I may try a Ducted fan at a later stage . 

I have one more wing to build then its a case of getting it all together .
Stephen Grigg23/12/2010 20:53:25
8691 forum posts
1128 photos
Looks interesting,has it been ,a puffed up one,at the christmas pudding already,looks a bit like a fish,is it called nemo
Wolfie24/12/2010 08:02:30
129 forum posts
218 photos
Steven, this is the 'Optica' design that you discussed in the EDF thread I assume?
Will you be using a duct around the prop too?
Stephen Jones24/12/2010 16:24:47
2878 forum posts
1656 photos
Hi Wolfie,
No this is not a Optica ,
I don't recall Mentioning  Sipa 200 before  . Other than in a thread called " wot is this iam building Where someone did suggest it might be a Optica .
And it would not be a Sipa 200 with a duct around it . Although you could also argue its not if it is prop driven . But for now will do ,
as i have seen many jet models prop driven that still look ok .
 Hope this helps

Edited By Stephen Jones on 24/12/2010 16:28:01

Tim Hooper24/12/2010 17:14:56
2911 forum posts
2412 photos
Now, isn't that a sweetie!
I know very little about EDF's except that it would probably need oversize intakes in order to go down that road, so the pusher prop seems like an excellent approach.
Stephen Jones01/01/2011 01:34:50
2878 forum posts
1656 photos
Hi again ,
A few more pictures still the small model yet again .

The motor is small but fits nice , I chose this motor as i have a smiler set-up in two other models .
One is a converted Epp foam glider which flys very well on less than half power for approx 4 flights of about 7 minuets each .
and the outher model i have is a depron bird .
both set-ups use 4.3g servos 2off a small 35Mhz receiver and a 350mah 2s battery thats why i thoght id build this so light . 
Stephen Jones03/01/2011 15:43:10
2878 forum posts
1656 photos
Hi Again .
Some more pictures ,

Just need to make the wing-tips add covering and the radio gear .
The weight at the moment is 78 Grams .
Stephen Jones07/01/2011 00:46:12
2878 forum posts
1656 photos
Opps ,
I got a bit carried away with the hot air gun .

Not shore weather to start a new cockpit , leave it or try and re-heat it back into shape with hot air gun and maybe a balloon in flated on the inside to try and get it back into shape ? .

Stephen Jones19/01/2011 23:36:31
2878 forum posts
1656 photos
Hi ,
Pictures of my 1st attempt at making my own moulded cockpit .

Not so good on this side .
Looks as though i will have to seal the foam in some way before i try again .

Dave Wilson20/01/2011 00:24:29
72 forum posts
43 photos
Come one SteveHurry up and get it done.... It's going to be a nice weekend so let's see it down the field flying...... The cucumber flew, this should have no problems
Stephen Jones20/01/2011 20:28:02
2878 forum posts
1656 photos
Hi Dave ,
So what do you think how it looks just get it done , bear in mind this is only a small model and is being built to aid an insight on any modification that may be needed in the larger version .
And intended for summer flying where it could land in long soft grass . ?

Edited By David Ashby - RCME Administrator on 20/01/2011 20:43:12

Stephen Jones20/01/2011 20:28:03
2878 forum posts
1656 photos
Hi Dave ,
I will finish of the covering . And now that i have the radio gear shouldn't take too long its just the cockpit doesn't look so great .

Edited By Stephen Jones on 20/01/2011 20:31:17

fly boy320/01/2011 22:22:56
3746 forum posts
22 photos
Hi Stephen, its a ww2 Vampire jet! FB3
Stephen Jones22/01/2011 00:11:41
2878 forum posts
1656 photos
Well its covered and only weighs 116grams without 350ma battery and needs linkages fitting .

Nearly time to tuck into the meat and gravy and build the 36" model .
Stephen Jones22/01/2011 00:14:24
2878 forum posts
1656 photos
Well dave ,
I dont think this weekend is going to be such a good weekend with all this frost .
Stephen Jones10/02/2011 00:52:56
2878 forum posts
1656 photos
Hi ,
Hopefully will be able to get a move on with the 2nd part of this build project now .
I have had my plan enlarged at the printers and made some minor changes to the wings as these will now be sheeted . Haven't made my mind up as to how best make up a battery box or if to fit under carriage fixed or retract .

Edited By Stephen Jones on 10/02/2011 00:55:32

BalsaBasher10/02/2011 08:56:53
45 forum posts
5 photos
Hi there
Nice project , would it not make sense to test fly the smaller prototype first ? Before committing to building larger version ?
Danny Fenton10/02/2011 09:58:18
9711 forum posts
4546 photos
Fascinating stuff Stephen, looking forward to more pics
Stephen Jones10/02/2011 16:03:28
2878 forum posts
1656 photos
Hi again fellow Wood Worms ,
Small update booms done .

Top fuselage i wasn't going to plank but wot the heck went a head with it anyway .

Will be starting on the lower part now . I have now decided to build the fuselage in two half's to allow easy access to get the motor in , and fix the wings into place .

Stephen Jones11/02/2011 00:20:32
2878 forum posts
1656 photos
Hi BalsaBasher ,
Well we haven`t had very good weather for test flying the Very small model and although the same but in different size the V-small model is built very light and is for more relaxed flying in calm summer weather , where as the small model is built for more ( hopefully ) fast and aerobatic flying ,
As the original plane was meant as a Jet aerobatic trainer .
That's why i have decided to go ahead with this build , Plus i could be waiting forever for the right conditions as i usually find i`am having to work when we do on occasion have any good weather
Wing skins cut and marked ready for tomorrow and belly of fuselage ready for planking .

Hopefully will have the wings built tomorrow along with the fuselage

Edited By Stephen Jones on 11/02/2011 00:38:57

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