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Old Nov 14, 2012, 09:22 AM
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United Kingdom, England, North York
Joined Nov 2004
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Thanks for the comments everybody.

My building starts and stops as the day job takes me away from home for extended periods and I have only just got back today. Just got settled after previous trip into building again and I get sent away again. Can't moan it puts bread on the plate and servos in the planes.
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Old Nov 14, 2012, 11:04 AM
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United Kingdom, England, North York
Joined Nov 2004
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Hardware

And here is what the day job has been providing for, just need to find the time at home to put it all together.

Flight servos Hitec HS85BB
Nose wheel steering servo Hitec HS85MG
Gear door servos Logic RC LSX 260R (mini retract servos)
SMS gear door sequencer (open - down / up - close)
SMS gear door sequencer (open - down - close / open - up - close)
4 x 55mm Vasa fans with new all carbon rotor
4 x Tenshock TS VZ1030 16T (2650kV)
4 x Hobbywing 40A platinum ESC (expected <25A but need 6S)
2 x Hobbywing UBEC (1 for flight servos 1 for retracts + doors)
Eflite electric retracts
Hitec Optima 9 Rx

Batteries not shown, I already have a large number of Loong Max Tipple cells, 3S 4500mAh which I plan on using as with a pair of cells in parallel to give me the 6S and the 53,000rpm in the fans.

I have started the wing joiners - more to come in the next days. I aim to sort out the wing joners then start retract and fan installation.
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Last edited by PeterF; Nov 20, 2012 at 06:47 AM.
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Old Nov 17, 2012, 02:56 AM
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United Kingdom, England, North York
Joined Nov 2004
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Start Wing Joiners

I have a couple of spare aluminium in phenolic resin paper wing joiner tubes so I decided to use these to join the wing panels to the fuselage section. I really cannot manage an 8ft (2.4m) wingspan model in one piece and all the build logs I have seen for this model have added removable outer wing panels.

Adding the resin & paper tubes to the outer wing panels was easy as these ribs had a central lightening hole cut just in front of the main spare, so I just enlarged these to take the tube. The fuselage was a little harder as the ribs were made in two halves and each half had its own holes. Therefore, once holes were made for the tubes the ribs had little strength left.

To reinforce the holes and also transfer the load from the wing tubes to the spars I made up some 1/8” (3mm) light ply riblets. The wing joiners pass through 3 ribs on both the outer panels and the fuselage. I believe that this will be adequate for this lightly loaded model.

This post takes the build to having the wings ready for the resin & paper tubes to be cut and glued in.
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Old Nov 19, 2012, 12:13 PM
One step at a time......
Canada, BC, Courtenay
Joined Mar 2011
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Quote:
Originally Posted by PeterF View Post
Hardware

And here is what the day job has been providing for, just need to find the time at home to put it all together.

Flight servos Hitec HS85BB
Nose wheel steering servo Hitec HS85MG
Gear door servos LSX 260R (mini retract servos)
SMS gear door sequencer (open - down / up - close)
SMS gear door sequencer (open - down - close / open - up - close)
.
Peter, can you point us to the sites/suppliers where the door servos and sequencers are from?

Many thanks and nice to see you are still working on this build.

Ben
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Old Nov 19, 2012, 12:50 PM
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United Kingdom, England, North York
Joined Nov 2004
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Ben,

Caught me on my other build now - something rather different to the Mosquito. I used the same gear door servos and sequencer on my Mosquito.

The servos came from a UK supplier, Servo Shop, http://www.servoshop.co.uk/index.php search for 260R and this quotes them as Logic RC 260R 12mm retract servo so you may be able to find them in Canada / USA.

The gear door sequencers are from a small UK supplier os specialist electronic gizmos, SM Services http://www.smservices.net/ then click on the shop and "On Board Units". You can probably find equivalents to these elsewhere but I have used SM Services for quite a lot of these little bits, they were around ebfore you could get this type of thing more readily nowadays so I stay with them.

Peter.
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Old Nov 19, 2012, 04:43 PM
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Continue Wing Joiners

Work continued on the wing joiners gluing the phenolic tubes into the first 3 ribs on the fuselage section and outer wing panels. I then made up some rear lugs from plastic tube and dowel to keep the wing panels at the correct angle of attack. These will not need to take much stress so this arrangement seems OK. I may change the wood dowel to carbon fibre tube at some point before flight. The same method of adding 1/8” (3mm) light ply riblets to take the load to the rear spars as for the main wing joining tubes was used.
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Old Nov 20, 2012, 03:41 AM
310mph Kolibri T25 Swist
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Sverige, Kronobergs Län, Ljungby
Joined Jan 2001
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Nice build!! Are Chris Golds still active? I remember him well from this old sky news clip

RADIO CONTROLLED JETS (8 min 47 sec)
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Old Nov 20, 2012, 06:47 AM
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United Kingdom, England, North York
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Chris Golds is active and still contributes to Quiet and Electric Flight International (QEFI) magazine amongst others and is still putting plans together.
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Old Nov 27, 2012, 04:39 AM
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Joined Nov 2004
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Motors, Mounting into Fans and Test Run

Following a decent amount of analysis of the options I have chosen to use the Tenshock 1030 motors to power the fans as these are rated for 480W. I will be using a 6S pack so I have chosen the Tenshock 1030/16 (2650 KV) motors. The Tenshock motors appear to have a good rep in model boat racing but do not get used much in model aircraft so I knew I was going somewhat out on a limb here.

The initial run up of the first fan has shown that it is very smooth with little sign of vibration with a decent amount of draft being produced. I measured 800g thrust from the fan for a 471W power input which is in line with my expectations and hopes for an efficient power set up. Cooling is good as a good blast of air flows between the motor and the motor tube. Allowing for 4 fans in parallel will reduce the thrust to 750g, so with 4 fans I get 3kg thrust (6.6lbs) for a plane weighing hopefully 3.9kg (8½lbs) that does not need unlimited vertical performance so I appear to have made the right choice to go down to 55mm fans rather than staying with the 70mm in the original plans.

I have put a decent write up of the motors and testing in the Vasa 55 thread, linked below rather than duplicating everything in this thread.

Vasa 55 fan with Tenshock motor
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Old Dec 14, 2012, 05:24 PM
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Arizona
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Everything is looking spectacular! Where did you find a short kit for the B2? I have the plans & have been debating starting the building process. After completely scratch building a BN-2B Islander I have decided I don't want to take that much time cutting out the parts on the B2...Thanks!
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Old Dec 15, 2012, 03:18 AM
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United Kingdom, England, North York
Joined Nov 2004
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I bought mine from SDB Models http://sdbmodels.com/Default.html but it was one of a dscontinued kit and it looks like the last kit has gone as it is no longer on the "sale" page. Another short kit is available from Laser Design Services http://store.laser-design-services.com/. One thing I would suggest is that you consider buying the plan from Traplet to make sure you get a good quality plan, I used the plan supplied by the cutter and the plan print was distorted and the ribs etc. did not match the sizes on the plan, I worked around it but wished I had bought a plan from the original source.

I should have some time of the Christmas and New Year break to get back into the build so should be posting again soon.
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Old Dec 15, 2012, 02:00 PM
Anything that gives me a High
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Love your Israeli painted Mosquito, it's even got the 1956 Sinai campaign strips......very cool.
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Old Dec 16, 2012, 08:50 PM
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Haven't visited this thread in a while, progress looks great!
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Old Dec 19, 2012, 11:23 AM
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United Kingdom, England, North York
Joined Nov 2004
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Complete wing attachment

Once again thanks for the compliments on both the B2 and the Mosquito.

I am back to the build again for a while. First off I have installed some front bulkheads for the battery compartments and then sheeted from the front spar to the leading edge on the upper surface. This is to add some more rigidity to the upper surface so that I can remove the lower support trestles and start cutting out the gear doors and adding the retracts. I then added the outer wing panel bolts, nothing heavy duty as they do not take any flying loads, just required to stop the outer panels sliding off the wing joiners.
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Old Dec 19, 2012, 08:42 PM
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looking great! nice work!
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