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Graham Bowers

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Posts posted by Graham Bowers

    Air power :)

    in All Things Model Flying

    Posted

    1 hour ago, Rich Griff said:

    Just shows what a good brain, computer, software and 3d printer can produce.

     

    I wonder if that gent will " offer for sale" the motor and kit of parts, either as an individual or small company ?

     

    Hope the likes of Perkins have seen the vidio...

     

    Anyone know the gent and his contact details ?

     

    Nice, very nice, very nice indeed.

     

    Will watch his other vidios.

     

    He's put the motor files up for anybody who wishes to print them.

     

    https://www.printables.com/en/model/613902-compressed-air-engine

    Which fuel for Saito FA-125

    in IC Engines

    Posted

    One of my flying buddies has just bought a used unflown model with a Saito FA-125 engine. He's an experienced electric flyer and asked me what fuel I'd recommend. I have zero experience with saito so thought I'd seek counsel here. It's in a Seagull Ultimate and is installed sideways.

     

    I've had a look at the instructions online and it says 10 to 20% nitromethane, warns against "castor oil type lubricants" and says there must be at least 20% oil content.

     

    What's the experience in here please, and are there any specific recommendations?

     

    Thanks.

     

     

     

    saito fuel.jpg

    The Big Question ?

    in Warbird kits

    Posted

    50 minutes ago, Eric Robson said:

    You've got more chance of getting a Hawker Typhoon kit out of Richard than his bike and that is no chance. 

    One has to dream. I was let loose on a couple of the suzuki triple 2 strokes back in the day, and had a GT500A myself.

    • Like 1

    The Big Question ?

    in Warbird kits

    Posted

    10 minutes ago, martin collins 1 said:

    Twist the knife Graham, get Richard to throw a kit in as well 🤪

    I'm not that cruel, I will be dropping him off at the train station after delivery. Kit's a good idea though, it'd probably strap to the seat 😉

    Mick Reeves Gangster 63 Lite

    in Build Blogs and Kit Reviews

    Posted

    1 hour ago, Nigel Heather said:

    For those that have built one, what's your view on undercarriage - stick with trike or modify for tail dragger.

     

    I'm going electric which means I would probably fix the nosewheel on a trike because difficult to route control arm through battery compartment.

    I've flown and seen both. The rougher the strip, the more likely I'd be to choose tail dragger. Or fly something else when the strip dictates.

     

    Choice of prop is a factor of course. With electric, choosing a motor that can swing a bigger prop is a possibility, and that may lead to lack of clearance with a trike.

    • Like 1

    Spitfire Over Berlin on Amazon Prime.

    in Chit-chat

    Posted

    25 minutes ago, leccyflyer said:

    Tried to watch the film "Spitfire Over Berlin" last night. Horrible. I can't stand the CGI fest which so many aviation films in recent years follow, but this was by far the worst I have ever seen. Shockingly bad. Notwithstanding the bizarre premise of the thinnest of plots, the CGI isn't as good as 1998's Combat Flight Simulator.

    Watched the trailer; practicing your understatement, I see 😉

    Warbird replicas Spit IX build preparation

    in Warbird kits

    Posted

    Thanks for all replies.

     

    4250 580v motors seem a bit thin on the ground right now. I discussed with Richard and eventually decided to go with an 800Kv version and prop accordingly.

    As regards batteries, I have 2200 4s and 2700 4s already. I'll probably conduct initial flights with 2700' 4s's, lead to suit, and take those flight times in to account. Before I build the fuz I'll shortlist some bigger battery candidates and see what adjustments can be made to the battery compartment.

     

    Discharging LiPos to Storage Charge Level

    in All Things Model Flying

    Posted

    If you have a "sticky button" then it's a no brainer - return it.

     

    However to your question about discharge rate. I have no idea what's considered best practice, however would have thought quite a bit lower than the in-flight discharge rate would be conservative. 5C or so with that type of equipment?

     

    If I need to discharge batteries I use a couple of 12V 21Watt wire filament vehicle indicator bulbs soldered up in series for up to 6S batteries. I have a couple of those, and as I try hard not to bring charged batteries home, it works for me. I get them close enough using the bulbs, then a charger on "storage" setting to finish off to about 3.8V per cell, but the charger only pulls about 10 Watts so is much too slow for the whole job for big batteries.

     

    I'll store batteries fully charged for no more than 2 days, otherwise pull down to storage. Although try to estimate how many I'll need at the field and charge an appropriate number. Before I knew about storage charge, I didn't bother, and killed a few packs. Not sure when they died as they were left for months.

     

     

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