Fighteraces UK
Posts: 78
Joined: 12/5/2006
From: Chester-Le-Street, UNITED KINGDOM
Status: offline
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After almost 18 months work, my 30% Skyraider project is nearing completion. Comissioned by Ali Machinchy of 'Als Hobbies' in the UK, the model is based 'roughly' on an 80% enlargement of the Nick Ziroli plan......but with MAJOR structural modification to cater for the large increase in size and loads. (The only information taken off the plan has been the basic outline, plus some of the rib and former profiles....the rest of the structure is a complete redesign)
Span is 180", power comes from the Moki (RCS) 400cc 5 cylinder radial on a 40 x 25 carbon prop. Retracts have been custom manufactured for the project by Darrell Tenny at Sierra Giant Scale. The model is of all traditional construction, with no foam or composites being used (except the glass cloth/epoxy finish, and a handful of small glass mouldings) She breaks down into 7 separate parts for transportation, and at present (before CG checks) has an AUW around 170lb, giving a wing loading of 3.5lb sq ft.
The model uses 18 servos in total, 4 x JR 8511's on the elevators & another 4 on the ailerons, 6 x Futaba S148's on the 3 retract valves, throttle, choke and centre pylon release valve, plus 4 x Tonegawa Seiko SP-050 industrial robot/UAV servos on the rudder, steerable tail wheel and the flaps. These servos are driven off their own separate power supply (7.2v, 5000Mah), but take their 'signal' from a stock JR PCM Rx driven via a Powerbox and a pair of 6v 1800mah packs. The remaining servos are driven through a Weatronic 'Dual Receiver' system, with a 7.2v, 5000Mah primary power supply, and a 6v, 3800Mah secondary back up pack.
At the present time, the fuseage is 99.9% complete and all systems are functional from the Tx. This week will see the wings mated to the fuseage and set up in preparation for initial engine runs, range checks and taxi trials to take place next weekend. Once this is complete, and the model is 'signed off' by my LMA/CAA Over 20kg Inspector, the 'Exemption to test fly' certificate can be applied for. Once this is in place, we can legally go ahead and carry out the required number of test flights, witnessed by my inspector, before the model can be 'signed off' and issue with it's full 'Exemption Certificate' to allow it to display at the UK model shows.
Work is currently centred on completing the 12 HVAR rockets for the outer wing panels (non droppable), the 2 x 1000lb free fall bombs for the centre section outer pylons (dropable), and the HUGE (5ft long) centre drop tank (dropable)
I'll update over the next few weeks with how things progress.
For further info, a full 'Build Thread' has been running on the UK's RCMF Forum right from the start of the project.....a link is below (no need to register to view it) It's now running to 73 pages, so it's a Looonnnggggg read !!
http://www.rcmf.co.uk/4um/index.php/topic,24106.0.html
A 'short' version can also be found on my company website...............
http://www.usaafhq.freeserve.co.uk/fighteraces/custombuild/skyraider1.htm
And for those looking for more information relating to the UK's rules and regs regaring 'Over 20kg' model, follow this link.
http://www.largemodelassociation.com/over20kg.htm
Cheers
Phil
< Message edited by Fighteraces UK -- 6/24/2007 10:22:11 PM >
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All Forums >> RC Airplanes >> Giant Scale Aircraft - General >> 30% 180" Skyraider nearing completion. 
30% 180" Skyraider nearing completion. - 
