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Member postings for Andy Hat

Here is a list of all the postings Andy Hat has made in our forums. Click on a thread name to jump to the thread.

Thread: Peter Miller asks what next?
10/08/2019 10:27:00

Hi Peter,

How about something with made from "alternative" materials?

One of the first planes I made was your Blue Movie 2 - remember that? Made of Correx - flew great and was virtually indestructible (very suitable for me at the time).

Perhaps correx, depron or some stuff you can get from B&Q cheaply? (I'm a big fan of your Flying on a Low Budget book)

Thread: Playboy Senior
09/08/2019 13:56:50

I flew it yesterday and it was great. No trim or extra weight needed. My problem now is learning how to get this plane down. It just didn't want to come out of the sky. Very pleased!

06/08/2019 09:17:51

After fitting larger/heavier wheels (+100g), bending the u/c further forward and adding 240g of lead in the nose, it now balances on the middle lower spar which is about 50% of the wing.

The total, ready to fly, weight is 1760g - which includes the 198g 2200mah 3S battery (which is against the firewall).

I'll try it out when the weather improves and report here.

Thank you all!

Thread: How to Straighten Horizontal Stabilizer?
05/08/2019 20:38:57

I've done it a few times. I had most success with a flexible hacksaw blade. Once you can get it through, you can saw parallel to the slot and minimise damage to the stab.

Edited By Andy Hat on 05/08/2019 20:40:18

Thread: Playboy Senior
05/08/2019 16:05:07

This is my just-finished Ben Buckle Playboy Senior.

I was careful to try and build it light BUT I've really messed up - there's no way I can get it to balance on the plan CG.

Perhaps I should have used a larger motor/battery combination (currently 3542/2200mah) but I calculated this would be adequate power. I moved the motor further forward but it made little difference.

Even with 420g/15oz of lead hanging off the prop adapter, it's still no where near the correct mark.

I've read that 50% might be adequate from this model but any experience or suggestions you have would be gratefully received.

playboysnr.jpg

Thread: Cambrian Electric Funfighter Hurricane
02/08/2019 17:20:19

I've just acquired this kit but it's missing the plan and a few pieces. Has anyone got a spare or old one that I could buy?

Also, the veneer on the wing is a bit wrinkled so I'm thinking I'll take my permagrit block and try to 'level' it out - would that be the best way to approach the problem?

funfighter.jpg

Thread: RCM&E September Issue.
29/07/2019 16:22:56

Thanks David. I fly electric and diesel only so it would be not much use to me.

29/07/2019 15:35:12

What's the subscription gift this month? (assuming they are still giving those out, can't find anything t'internet)

Thread: Stockpiling
20/07/2019 18:17:09

Thanks Percy, I'll be interested to know more about it.

Edited By Andy Hat on 20/07/2019 18:20:55

20/07/2019 17:29:54

Sorry but I don't see the problem here for Jon. I can't see that it makes any business sense to deny orders, or try and put people off ordering spares, of any quantity. If more parts need to be manufactured, or ordered, then that's what I see as normal business/stock-control.

I'm sure I'll get jumped on for going against the flow on this, but I can't see the logic of a business refusing any orders. And, putting people off ordering spares (perhaps even because they want to keep a beloved engine running for many years to come) i.e. essentially saying that you don't want their business - is that really sensible?

 

Edited By Andy Hat on 20/07/2019 17:31:28

Thread: secrets of sanding
12/07/2019 16:27:19

My current project is a Ben Buckle Playboy Senior kit. It's a perfect example of pre-cut parts that are not accurately cut. You are meant to fettle six wing-tip ribs from the standard size, but its not actually possible because the drawn ribs don't fit into the standard ones. I don't think the drawn ribs are correct either, since my copies (cut using photocopies as a template) didn't fit too well. The pre-cut wing tip and tail parts were approximations of plan parts.

I'm not complaining, I knew what to expect from making other BB kits. I'm not sure how old the kit was when I got it but I hope some new templates were made after mine was made...

Anyway, here's a pic, you might be able to see where I've accidentally marked the soft wing spars when sanding the ribs - doh!

The Axminster stuff looks good - particularly the detail sanders - cheers.

20190712_154141.jpg

12/07/2019 15:06:10

OK, I've built a large number of planes in my time but there's one part I always dread - sanding wings.

My building is not as neat as some construction I've seen here. It would be great if everything lined up but in reality, my stuff needs some 'adjustment' after gluing, i.e. ribs need sanding down to match the spar height, drips of glue need removing etc.

A lot of the time, I'll catch the top of a rib (and break it off) when I'm sanding a spar, or take a groove out of a spar when I'm sanding along the top of a rib.

One of problem I have is holding down a wing (usually over a table edge) whist sanding it. Occasionally, I've had bad breaks because I'm applying too much force.

I use my Permagrit block a lot but also a rubber sanding block (paper attached by spikes over the top. I also use those sponge sanding blocks. Even with the softer tools, I can still cause damage to the delicate structures!

My models look OK in the end (covering can hide a multitude of sins/repair) but any expert-tips on sanding would be great to hear.

Thread: Thunder Tiger GP42
02/07/2019 11:26:04

A handy tip I was given by an old chap:

(with the engine not running) set to low throttle, fit some tubing on the fuel feed. Blow down the tube whilst adjusting the bleed valve. You can 'feel' the resistance and set the valve so you're able to just get enough air through.

Thread: Ben Buckle Junior 60 build
22/06/2019 10:59:27

Pat - Yes the first flight was hairy! If yours is the Flair tail then those measurements make sense. My Ben Buckle has much smaller moving surfaces so need more throw. The throws on the first flight were no where near enough but it was wallowing so much, I don't think anything different would have helped. I can live with what I have for now but if I built one again, I'd go with the Flair tail.

I don't have a table saw so I stuck some balsa to a board and sanded it into a wedge. Then stuck it onto the tail plane seat with double-sided tape. Should be flight testing later...

20190622_104111.jpg

21/06/2019 22:21:01

This thread has some interesting stuff about J60 trim/incidence:

**LINK**

Looking at the model, I think I'd rather attempt to make a very slim wedge to go under the tail, rather than hack away at the current fuselage.

Next one I build will have the top longerons continued without a break, until the end of the fuse - like someone on that thread did...

21/06/2019 22:03:40

I think that be a harder permanent change and it might spoil the nice look. it's looking like sanding off the rear (4mm at the back, sloping to zero at the front of the tailplane) may be the best thing to do. Difficult to do accurately but worth a try.

21/06/2019 20:22:21

It flies!

Well, the first flight was very scary. under power, and without power, it was ballooning/wallowing/dolphin-ing and there was limited control. I managed to get it down intact (those wheels are great at absorbing a heavy landing!).

So, I put two halves of a lolly stick (4mm) under the leading edge of the tail, added two washers to the top of the motor mount, added another 75g of weight to the front and moved the clevises in by two holes on both the elevator and rudder.

The next flight was much better and followed by 3 more batteries-worth of flights. It flies around nice and slowly. Most enjoyable! (I did learn that trying to take a photo whilst flying is probably not a good idea...)

The extra weight may not have been needed so I'll try taking it out as Pat suggests. Both the rudder and elevator now move ~40 degrees. The Flair tail, with larger moving surfaces) looks much better but these are OK for now. Raising the tail LE 4mm meant that it flew well with zero elevator trim.

Any suggestions on how to permanently build-in the raised tail LE? I'm not sure I'd be able to accurately sand a piece of balsa sloping from 4mm to zero, or cut a slope into the existing rear end.

20190621_153659[1].jpg

Edited By Andy Hat on 21/06/2019 20:24:20

20/06/2019 20:56:22

It's finished!

I had to add 220g of lead to the front to get it anywhere near balancing.

Looking forward to flying it soon. Slightly worried about it climbing too fast and needing permanent downtrim. Also worried about the small rudder - will it be enough to control it?

20190620_204337.jpg20190620_204413.jpg

20190620_204434.jpg

20190620_204359.jpg

16/06/2019 15:16:49

It's nearly finished. Just a few more things to do, primarily the decoration. I've ordered some matt black vinyl for that.

I can confirm that less than 3m of Solartex was enough to cover it. Luckily I had this much in cream.

20190616_145937[1].jpg

Edited By Andy Hat on 16/06/2019 15:17:06

Thread: Junior 60
16/06/2019 11:21:55

I've just built one of these Ben Buckle kits and, at first, what to do with the wing tips wasn't clear to me either.

It looks like it's too late for you to cut the slot in the outer rib (shown in the lower middle of the previous photo).

If you've already put the lid on the trailing edge sandwich then I'd chop the wing tip where it meets the end of the rib. You'll then need to thin the end of the wing tip so it fits in the triangular sandwich, against the rib. Then finish off with a triangular brace on the inside (perhaps the part you cut off the tip).

Edited By Andy Hat on 16/06/2019 11:26:15

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