Patmac

Gliders have 2 airbrakes advertised on their website. http://www.gliders.uk.com/products.asp?dept=16&pagenumber=1&sort_on=&sort_by= You can order online or use their a freephone number 0800 9170107. HTH Pat.

Here's a couple of links http://www.brchobbies.com/?page=shop&item=378 http://robotbirds.com/catalog/index.php?cPath=56_102 There's a wider choice at the Robotbirds one but you would have to decide on a esc & whether to use a GWS prop directly on the shaft or shorten the shaft & use an adapter. HTH Pat. PS the flange mount would probably suit the Camel. It's supplied with the BRC motor & some of the Robotbird ones.

Chris is 170watts a typo ? A motor would need to pull about 23A on 2S lipo. That's equal to about .22bhp - the power of a decent old 2.5cc engine. I tested a bell motor a while back & got similar results to Mike - 2s lipo turning a GWS 8x4.3 at 7700 pulling 9.5A for 70watts. I have an unstarted Guillows SE5a that I planned on powering with a home wound CD rom motor. It turns a 8x4.3 at 5800 on 2S lipos at 5A for 30watts. That's around DC Dart power but on a bigger prop. Cheers, Pat.

Peter, are both escs programmed identicaly ? If you swap around as Chris said & the characteristics go with the escs that could be the problem. Which esc/motor combo are you using ? Pat.

Unfortunately there's a lot of unsubstantiated "factoids" circulating within the hobby about Nimhs versus Nicads. I did a little research using some of the munufacturers web sites & established that the so called memory effect is similar in both types of cell, they both self discharge at about the same rate, when they are near fully discharged the voltage in both types drop at about the same rate & both types have similar temperature dependant characteristics. The main differences are : weight for weight Nimhs have a much higher capacity than Nicads; some Nicads can be charged & discharged at a higher rate but this advantage has been nearly eliminated with developement in Nimhs; Nicads contain the hazardous material cadmium & have virtualy been displaced from the retail market by Nimhs. If you're interested in finding out more have a look at http://www.panasonic.com/industrial/battery/oem/chem/nicmet/index.html There used to be similar info on Panasonic Nicads but they appear to have removed it recently. Cheers, Pat. PS from personal experience black wire corrosion happens with Nimhs the same as Nicads.

It doesn't matter whether the Tx has a Xtl or is synthesised. You can use any make of 35MHz Rx except ones that are PCM. PCM Rx's need to be matched to their own manufacturer's Tx. There's a mistake in the explanation by Kevin Crozier in the April RCM&E. Pat.

I think we could do with some smilies on this site. Pat.

Apart from price & product quality neither have I. Pat.

Dream on Vincent. Pat.

Here's some links to bell motor/esc combos http://bounceurl.com/w8k8pmz http://bounceurl.com/54t5yb1 http://bounceurl.com/iwye29w http://bounceurl.com/b3t12j4 http://bounceurl.com/3r71jjp They're all shortened URLs but should take you to the relevent pages. Some people recommend only the most expensive lipo names as reliable. I've found that there are much cheaper alternatives especialy if you're prepared to shop internationaly. Ive bought a number of lipo packs from this site: http://bounceurl.com/es40uq2 at half the UK cost & they've prove good quality. I only buy the 20-30C rated ones & normaly use them at a much lower discharge rate. IMHO the ones to avoid are lipos that have previously sold at a higher price & are now discounted or are advertised on the same site as other brands with the same C rating & capacity but are substantially cheaper. I don't want to name a particular brand because it's my opinion but could be construed as libellous. HTH Pat. PS it seems that from this site you will have to copy & paste the links I gave to get to the various sites.

One of the cheap bell motor/esc combos from BRC or Robotbirds or one of the other retailers would be more powerful, lighter, & give better duration than a 400 brushed motor with the same battery. A battery pack of 7 or 8 2/3AF size Nimhs would be the cheapest option if you already have a charger but if not a 3 cell lipo & cheap Perkins charger would be comparable. The lipo would be much lighter & give more power/duration flexibility. suitable Nihms would be around 1400mAH, lipos 800 - 1800mAH. Avoid discount priced lipos. Pat.

I built a Mercury original but modified with ailerons around 35 years ago. IIRC the dihedral was greatly reduced to around 2" each wing & the incidence was also reduced by half. Ailerons were full span 1.5" or 2" TE stock strip hinged on a 1/4" false TE & operated via torque rods. The ailerons were recessed into the wing outline. The rest of the model was more or less as per plan & the all parts nylon covered. Power was a Fox 25. A couple of guys I flew with at the time had similarly modded Galahads powered by OS 15s - the old loop scavenged version of course. They all flew beautifully, mine was predictably more spritely but the OS15 ones were adequately powered with better engine reliability. Pat.

I've sent you an email. Pat.

Peter, I've scanned the DC instructions as 4 gif files & inserted them into a MS Word doc. The file is 3.2MB. I've also scanned the text of an article on operating diesels from a book using OCR software into another Word doc. This file is without any illustrations but only 41KB. Because of the size of the instructions file it'll need a broadband connection. Can you open MS Word OK & do you have broadband ? I'll need your email address also. There doesn't seem to be any private message facility on this forum so you will either have to temporarily change your profile to accept emails or you culd contact me via the PM facility of either http://www.bmfa.org/forums/ or http://www.rcmf.co.uk/4um/ I'm a member of both these sites with the same username. HTH, Pat.

Hi Peter, do you have the DC engine instructions ? If not I can scan you a copy. Cheers, Pat

John, it's simply figure of 8 stitching with button thread. It makes a very efficient free moving hinge especialy good with relatively thin sheet when it's difficult to make a slot for a plastic type hinge. They used to be used a lot with control liners. Pat.

Hi Peter, I've got the Aeromodeller that includes the 1/2 size drawings for the original Ebenezer. I made a drawing from it with mods to the nose to suit a Cox 049. If you want a gif of the drawing IM me. Pat.