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The Big Question ?


RICHARD WILLS

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2 hours ago, Geoff Gardiner said:

It's the 72inch Tony Nijhuis Mosquito.

 

I built it a few years ago now and it turned out a bit heavy.

 

It is currently in bits on a shelf, after a nasty tipstall incident.

According to his website, the Tony Nijhuis 72in Mosquito weighs 14lbs and has a wing loading of 40oz/squ ft. 
Tapered wings and a high wing loading is not a combination made in heaven. ☠️

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5 minutes ago, Piers Bowlan said:

According to his website, the Tony Nijhuis 72in Mosquito weighs 14lbs and has a wing loading of 40oz/squ ft. 
Tapered wings and a high wing loading is not a combination made in heaven. ☠️

That's  why I made mine from depron and foamboard same size less than half the weight. At present uses 2 3s 3000.  It would be better about 60" with a single battery. I tend to fly the 110 more as it is one piece, twice as many flights with the same batteries and I can hand launch it myself. Now I have the dolly I will see how the Mosquito goes from that.

20220319_170742.jpg

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26 minutes ago, Eric Robson said:

That's  why I made mine from depron and foamboard same size less than half the weight. At present uses 2 3s 3000.  It would be better about 60" with a single battery. I tend to fly the 110 more as it is one piece, twice as many flights with the same batteries and I can hand launch it myself. Now I have the dolly I will see how the Mosquito goes from that.

20220319_170742.jpg

What type of foamboard did you use? The Hobbycraft stuff or something more exotic?

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2 hours ago, Piers Bowlan said:

According to his website, the Tony Nijhuis 72in Mosquito weighs 14lbs and has a wing loading of 40oz/squ ft. 
Tapered wings and a high wing loading is not a combination made in heaven. ☠️

Yep, agreed - nice, but just a bit too big, too heavy and too heavily loaded for my flying fields. I think the 60-odd inch size that Eric is talking about would be the sweet spot for me, for a Mossie. So much so that I managed to resist a 73" span CMPro one that went to auction on eBay at the weekend and went for a song. Didn't look half as nice as Eric's one there though - the CMPro one has quite a portly fuselage and there is something about the nacelles too.

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1 hour ago, leccyflyer said:

Yep, agreed - nice, but just a bit too big, too heavy and too heavily loaded for my flying fields. I think the 60-odd inch size that Eric is talking about would be the sweet spot for me, for a Mossie. So much so that I managed to resist a 73" span CMPro one that went to auction on eBay at the weekend and went for a song. Didn't look half as nice as Eric's one there though - the CMPro one has quite a portly fuselage and there is something about the nacelles too.

Just looked up the CMPro Mosquito on YouTube and it looks too short making the fuselage look porky, the nacelles look oversize probably to accommodate the motors fuel tank and retracts. Mine are wrong too the front lower cowls are Spitfire. 

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GG

 

If you build light, then you do not need to fly so fast so the energy taken into any mishap is very much reduced allowing for a less beefy construction.

 

KE = 1/2 m v2 (2 is squared - I could not find the superscript function)

 

My Mossie which is now 17 years old and still flies regularly. 74" wingspan and weighed around 5lbs including batteries, (2 x 3S 2800mAH). As Richard would say, more "cartoon scale" but great fun and shows no sign of tip stalling.

PICT2531sm.jpg

Edited by Andy Gates
missing picture
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I understand that but the DC3 in question is significantly bigger, and the thread mentions fatigue in the fuselage area - from general use I believe.

 

I expect my models be flyable 12 months a year, and not have to leave them at home if the ground is  too hard, too soft, or has too many worm casts. So I like a little robustness 🙂

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Hi, GG,

The stress cracks mentioned were regarding a Percival Prentis by the same designer caused by a heavy landing. The  method of separating the fuselage is not the way I would be happy with as it is at a point where a 3 point heavy landing would create a lot of stress but Robin Fowler favours it and it seems to work for him.

Early Fw  Condors were prone to go at that point. 

Screenshot_20240424-224121_Google.jpg

Edited by Eric Robson
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49 minutes ago, Andy Gates said:

GG

 

If you build light, then you do not need to fly so fast so the energy taken into any mishap is very much reduced allowing for a less beefy construction.

 

KE = 1/2 m v2 (2 is squared - I could not find the superscript function)

 

My Mossie which is now 17 years old and still flies regularly. 74" wingspan and weighed around 5lbs including batteries, (2 x 3S 2800mAH). As Richard would say, more "cartoon scale" but great fun and shows no sign of tip stalling.

PICT2531sm.jpg

Andy and I use to fly together at Rivenhall in Essex . So I got to fly some of his models including the Mossie and his very light Chipmunk . 

The designs are by Ivan Pettigrew and are a bit like the old kiel Kraft stringers and tissue style of construction . Probably a bit too semi scale as Andy says , but amazingly easy to fly when you compare it with the more typical 14lb 72" Mossie . 

You certainly felt comfortable flying it with every confidence of bringing it home in pristine condition . 

Going a little more scale will be the answer . But it shows what can be done . The landing speeds were trainer like , so quite modest retracts would suffice . 

Have a look at his plan as his method of undercarriage was unusual but clever . 

Thanks Andy . 

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Very Nice Andy .  

The Mediterranean colours show of its clean lines . I thought that about the captured 109 "black 6" when I first saw it . 

That colour is really easy to see in all weathers too . 

great job 😁

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Hi, here is another one ready to go. I wanted to try Richard’s monochrome finish, I think it has worked well.

It has a Quantum 40 motor, about 700 watts on a 12 x 6 prop &  4s 4000 lipo. The cg is at 85 mm. Is that OK?

Can you remind me of what the control deflections should be please?

I have really enjoyed this build & following the numerous threads, can’t wait to start on the Tempest.

John.

IMG_0233.jpeg

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Blimey John , that is so like mine I could take it home by mistake!

Have you considered counterfeit notes ? 

The only way I'd know which one to take home is that mine is the right way up 😁

Joking aside , I think this proves beyond doubt that if you follow a simple process in bite size chunks, you will end up with an outstanding result , easily able to challenge the best ARTFs plus have the satisfaction of saying that you properly built that (as apposed to an assembly ) . 

John , if you are wondering what your plane looks like the other way up , it a lot like this . 

Thanks for your comments , makes it all worthwhile . 

IMG_6400.jpg

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4 hours ago, John Timmis said:

Hi, here is another one ready to go. I wanted to try Richard’s monochrome finish, I think it has worked well.

It has a Quantum 40 motor, about 700 watts on a 12 x 6 prop &  4s 4000 lipo. The cg is at 85 mm. Is that OK?

Can you remind me of what the control deflections should be please?

I have really enjoyed this build & following the numerous threads, can’t wait to start on the Tempest.

John.

IMG_0233.jpeg

You must have the CG spot on as it’s so stable inverted!

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