Topic: If you dont like EPP toys - don't bother to comment the Concept

Just read another thread about what EPP toy to have....Well this is what I'm up to.
The new toy is a development from my Consept, this was loosly based on the "Bluto -Oddesy"  theme, a triangular nose in front of the wing. Problem with planform (short nose moment arm) is that lots of lead has to be added to the nose to achieve the CoG
Some photos of the Consept

Whooops lost that next post ....try again

The Consept 2
I've added a Fuz in the wing, with a foil section This photo shows the underside part covered showing the tape layup

 A couple of shots of the toy covered, but needing some trim to give it some colour. Tomorrow eves job

That wsa the top ....now the underside

Not great photos, just took them in the garden with some flash
Just to show how the cost of a 60" toy like this compares with a comercially produced one
 Foam for the main body approx £20
Carbon Golf club shafts for the spars £2:50 for the pair
Sheet of 4" balsa 1/4"  for the Elevons £3:50
Work it out yourself, Glue/Tape/Covering etc - you would still have to buy if you bought a kit
Oh about a 2 weeks work evenings (couple of hours each)
Will post other photos when finished to this stage

i like the fuzed version, looks good

Forgot to mention
Epp for the Fuz is covered first with glass tape, then Lam film, then solar film.
Balsa Elevons an foam fin covered in light weight lam film (got this from Abbo) then solar film.
All to 60" Epp rules.

i like the fuzed version, looks good

Ta Phil

Not great photos, just took them in the garden with some flash
Just to show how the cost of a 60" toy like this compares with a comercially produced one
 Foam for the main body approx £20
Carbon Golf club shafts for the spars £2:50 for the pair
Sheet of 4" balsa 1/4"  fore the Elevons £3:50
Work it out yourself, Glue/Tape/Covering etc - you would still have to buy if you bought a kit
Oh about a 2 weeks work evenings (couple of hours each)
Will post other photos when finished to this stage

Amazing. Considering a bluto costs 169 quid. Great job.

Hii Yellowblue - nice job.
I built a similar planform wing out of ordinary white styrofoam (£4.50 a block from Wickes) and, as you stated, it needs a shedfull of lead up front. I tried to offset this with a "V" cutaway on the rear centreline but (dumb Clive) negated this with Twin fins (D'oh!).
Here is a video of it as well as, firstly, another conventional wing I built (Again Styrofoam).
Catch the classy landing ....

Clive's homebrews at the Wrecker. 9 May '10.wmv

Clive

Carbon Golf club shafts for the spars £2:50 for the pair

May i ask where you are getting your Carbon golf club shafts from at that price?  I'm on the lookout for some at the moment you see...

Nice looking foamy too

Andy

I like the concept (Consept!)

I must admit the idea of a foiled fuselage blended into a delta nosed wing is one I'd toyed with in the past. Good to see someone making it a reality. How much lead can you get in the nose / how much weight do you save by gettingt it there?

Steve

I like the concept (Consept!)

I must admit the idea of a foiled fuselage blended into a delta nosed wing is one I'd toyed with in the past. Good to see someone making it a reality. How much lead can you get in the nose / how much weight do you save by gettingt it there?

Steve

Hi Steve, thanks for the comments, not sure about amount of lead. I like to get it finished an leave the forward hole open, then play with the CoG. Using the Cog measurements of the Mako (same foil) and using similar nose length, I hope about 4-5 oz. hope to finish it this eve or tomorrow. When I know, I will post.
Brian

May i ask where you are getting your Carbon golf club shafts from at that price?  I'm on the lookout for some at the moment you see...

Nice looking foamy too

Andy

They were a bulk buy by a club member, the order was i believe for over a hundred. I think he found out about themon the Net

They were a bulk buy by a club member, the order was i believe for over a hundred. I think he found out about themon the Net

You can often find complete clubs at places like sports direct for a couple of quid each, even carbon ones.

Hii Yellowblue - nice job.
I built a similar planform wing out of ordinary white styrofoam (£4.50 a block from Wickes) and, as you stated, it needs a shedfull of lead up front. I tried to offset this with a "V" cutaway on the rear centreline but (dumb Clive) negated this with Twin fins (D'oh!).
Here is a video of it as well as, firstly, another conventional wing I built (Again Styrofoam).
Catch the classy landing ....

Clive's homebrews at the Wrecker. 9 May '10.wmv

Clive

Just had a look at the vid, nice one. They both seem to fly well, shame you didn't make them out of EPP.
I'm not keen on twin fins, they have disadvantages. The weight penalty, also more bits to be knocked off....This happened to Tuckers new Bluto last Saturday, we had a minor mid air (we both carried on flying) during a turn, it cracked one of the fins, on landing it fell off...not good
Talking of the Bluto fins, I don't think they are race legal....I didn't think Ply was allowed in fins...but then....

Well its finished or nearly, I still have to add the wipers, but it was getting late.
It came out at 2lb 3oz, I was pleased with that, its nice to be able to build in lightness.
Some photos

couple more

For Steves info to get the CoG at 18% MAC I've used 2.45oz of lead. The Mako and the original Concept both flew with the Mac at 21%, but its safer to start with a tad nose heavy toy an then find the sweet spot.
couple of photos of the lead

An to keep it race legal its behind the 2" needed for the nose

The hatch for the RX and switch (plug in wires)

On charge, ready for tomorrow, that's if its not to windy....I still need to cut into it for a ballast tube...need to sort out the CoG first

It is surprising that the nose "extension" and the hoerner (sp?) type tips have completely masked the Blutoish shape. It now looks like some futuristic starship! - well, to my eyes it does.!  Best of luck on the maiden.

Why did I not make my models out of EPP? - cost!
I needed cheap "proof of concept" models before committing my twenty seven of her Majesty's British poundsworth off EPP block to the hotwire cutter. I can re-use the Rx Servos and battery when I refine the design enough to move over to EPP.

The Assegai (single fin) does fly well, but the unnamed twin fin needs work on it's diff - look at the video and it balloons on turning to port and dives on turning to starboard.
Positives on both are the stiffness that NS brings and the fact that the section chosen (PW51) works well.

Clive.

35oz is excellently light for that kind of planform Brian. Good Job!

2.5 oz in the nose is a pretty small amount compared to most (that I've built anyway ).

Looks a real mean machine in the photos. Looking forward to a flight report.

Steve

Too pointy!
or is that for stabbing comitee members
RR

As always Brian ,
                 It looks slicker than a slick thing in an oil slick

                       Bet its fast aswell , i think you can spot a fast bird from a picture .

        And that is a fast looking beasty and concept Evolution is a cracking name for it 

                                     Well done mate


                             Bob

Too pointy!
or is that for stabbing comitee members
RR

No Ronnie Trustees,  I take it from that you like it 

As always Brian ,
                 It looks slicker than a slick thing in an oil slick

                       Bet its fast aswell , i think you can spot a fast bird from a picture .

        And that is a fast looking beasty and concept Evolution is a cracking name for it 

                                     Well done mate


                             Bob

Ta Bob, I try an make them a tad different 

No maiden today, life got in the way  Weather permitting its on for Saturday, might even get some photos of it in the air, That's if Skirmish or Timinator will oblige 

Just to mention...I've spelt Concept a number of ways....Red wine after I've come in from the workshop. prob is I can't find the modify button, there used to be one, aint there now

Yep Looks great
RR

Mmmm... looking very 'propper'  Those wing tips are becoming quite a signature touch.

Just read another thread about what EPP toy to have....Well this is what I'm up to.
The new toy is a development from my Consept, this was loosly based on the "Bluto -Oddesy"  theme, a triangular nose in front of the wing. Problem with planform (short nose moment arm) is that lots of lead has to be added to the nose to achieve the CoG
Some photos of the Consept

Nothing wrong with routing the isobars where you want them to go Brian - especially on a wing.

Smart move!

JH

Nothing wrong with routing the isobars where you want them to go Brian - especially on a wing.

Smart move!

JH

Ta Jim, did you see my Sitar...same sort of thing on this thread...http://www.rcmf.co.uk/4um/index.php/topic,82285.0.html
Brian

Mmmm... looking very 'propper'  Those wing tips are becoming quite a signature touch.

Ta Richard, yep but as you know I like things to have some curves   

It is surprising that the nose "extension" and the hoerner (sp?) type tips have completely masked the Blutoish shape. It now looks like some futuristic starship! - well, to my eyes it does.!  Best of luck on the maiden.


.

Clive.

Hi Clive

Some of us are now convinced that Flash Brian, as we have taken to calling him, is in fact part Klingon...

I'll bring my camera on Saturday Brian, no problems.

I have something a bit similar on the blocks myself, tried to add a pic but failed again...

Cheers

Tim

Hi Clive

Some of us are now convinced that Flash Brian, as we have taken to calling him, is in fact part Klingon...

I'll bring my camera on Saturday Brian, no problems.

I have something a bit similar on the blocks myself, tried to add a pic but failed again...

Cheers

Tim

Ta Tim

Tim sent me a couple of photos of his new creation. He was using the nose for another model repair...it was to small so he's added it to his wing....Might be the way forward for those that can't blend in the foils
His pics

Really nice planform on that one!  Taken the UGLY Bluto shape and refined it! Love the aspect ratio!