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Search: Posts Made By: JSF-TC
Showing results 1 to 23 of 23
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Forum: RC Jets
10-11-2020, 03:50 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Looks good with it all in one piece. I...

Gary,

Looks good with it all in one piece. I bet it helps the motivation for that last push to the finish line.

You will get there, just like eating an elephant - one bite at a time!


Paul
Forum: RC Jets
09-22-2020, 07:29 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Rather than plywood for the vent...

Gary,

Rather than plywood for the vent support, I would recommend using thick G-10. I used plywood on my Hunter, but overtime there is a slow seepage of fuel from the vent and it soaks into the...
Forum: RC Jets
09-10-2020, 12:27 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

I do the above with both Hysol and thickened...

I do the above with both Hysol and thickened epoxy, using 3mL syringes for small to medium tasks. I cut off the luer lock outer thread of the syringe to expose the inner nozzle. You can also use some...
Forum: RC Jets
05-21-2020, 06:33 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Glad to see you back making progress...

Gary,

Glad to see you back making progress on the 105. Nice workmanship throughout.

Lots of classic model building and engineering puzzles to work out. Definitely not a PNP.

Keep going,
...
Forum: RC Jets
01-28-2020, 04:00 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Can you arrange for the smaller tire...

Gary,

Can you arrange for the smaller tire door to contact the wheel when they are all retracted/ closed and use the tire door as a sort of up-lock, or at least to hold the door up and to stop it...
Forum: RC Jets
09-23-2019, 07:17 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Why not get some gear door mounts 3D...

Gary,

Why not get some gear door mounts 3D printed so that they clamp around the gear and hold it correctly?


Paul
Forum: RC Jets
05-20-2019, 06:21 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Not sure how you would use the hall...

Gary,

Not sure how you would use the hall effect sensor for wheel speed, as you would have to be counting pulses as the wheel rotates. I guess you could do some LUA programming, but not sure of...
Forum: RC Jets
02-25-2019, 07:59 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

A co-worker mentioned an F-105 movie on Amazon...

A co-worker mentioned an F-105 movie on Amazon Prime, Thud Pilots. I have not watched it yet, but here's the link.

Should be good for some inspiration.
...
Forum: RC Jets
02-03-2019, 06:33 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Hang in there Gary. Take a break and come back...

Hang in there Gary. Take a break and come back re-charged to tackle the next challenge. You'll come up with even better ways to solve a problem when you are not thinking about it.

Paul
Forum: RC Jets
01-31-2019, 04:09 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Great progress. You make it look easy!...

Gary,

Great progress. You make it look easy!

I love your dust collector sanding table - with I had one. I now have a heavy film of dust all over my garage from sanding the Buccaneer. Going to...
Forum: RC Jets
01-19-2019, 07:52 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

https://cimg9.ibsrv.net/gimg/www.rcuniverse.com-vb...

https://cimg9.ibsrv.net/gimg/www.rcuniverse.com-vbulletin/1500x2000/6b183066_cb93_4af2_9364_8624b2e5c225_0bf96f8555ab25781cc5fc92571700ce22b67419.jpeg
Gary,

You need one of these. ;)

3mm...
Forum: RC Jets
01-07-2019, 07:15 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Good point Bob, a lot to consider for a good CF...

Good point Bob, a lot to consider for a good CF design.

Dragon have other options too;

0/ 90deg layup;
https://dragonplate.com/0_90-Degree-Carbon-Fiber-Twill_Uni-Sheet-3_16-x-12-x-24
...
Forum: RC Jets
01-07-2019, 06:11 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Carbon is certainly way more expensive...

Gary,

Carbon is certainly way more expensive than Al. Are you that desperate to save a few ounces?

Consider uni-directional carbon for spars to get the optimum strength. Woven fabric layups...
Forum: RC Jets
12-30-2018, 08:13 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, If we assume a safe maximum allowable...

Gary,

If we assume a safe maximum allowable stress for AL 7075, with appropriate safety factors is 165MPa. That takes into account material uncertainties and a 1.5 safety factor on the loads to...
Forum: RC Jets
12-29-2018, 04:00 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, No problem. So, with a 65lb model...

Gary,

No problem.

So, with a 65lb model and a 70mm spar depth I re-did the calcs.

The quickest way to lower the stresses is to increase the Area Moment of Inertia of the spar, which , with a...
Forum: RC Jets
12-29-2018, 07:17 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, I re-did the calculations using the...

Gary,

I re-did the calculations using the standard bending equation (Stress = M.y/I) but based on the same very crude assumptions above.

For a 6cm deep spar with a 2" (5cm) hole and 1/8" (3mm)...
Forum: RC Jets
12-28-2018, 07:47 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, I did some VERY crude calcs, making a...

Gary,

I did some VERY crude calcs, making a lot of assumptions. I do engineering calcs in metric, so I converted all to metric units.

Span = 5.83ft = 1.775m
Center of lift at 1/2 semi-span =...
Forum: RC Jets
12-14-2018, 02:36 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, With the stud in the wing root method,...

Gary,
With the stud in the wing root method, could you not have a slot in the fuselage to allow the relative movement of the stud as you insert the wing. A large washer or plate underneath the nut...
Forum: RC Jets
11-26-2018, 04:12 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Looking good. I too find taking a...

Gary,

Looking good.

I too find taking a break when you are stuck helps let the subconscious work on the problem, and then suddenly you can come up with a solution out of the blue.

Paul
Forum: RC Jets
11-08-2018, 04:50 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary, Neat details - they will help bring...

Gary,

Neat details - they will help bring the model to life.

I assume that those speedbrake hinge fairings are going to cover a fully articulated and actuated speedbrake installation??:p:p
...
Forum: RC Jets
10-25-2018, 06:33 AM
Replies: 978
Views: 200,370
Posted By JSF-TC

Thomas, I think we could enlarge the shaft...

Thomas,

I think we could enlarge the shaft to 1/2". The rib depth at the pivot point is approx 18mm (offset for skin thickness), so that would leave 3mm of rib material either side of the shaft....
Forum: RC Jets
10-24-2018, 06:48 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Gary - great to talk to you. The concept...

Gary - great to talk to you.

The concept will be to 3D print a new tailplane plug, make a mold and produce a new set of tailplanes.

After downloading a couple of 3 view drawings I found that...
Forum: RC Jets
10-17-2018, 07:05 PM
Replies: 978
Views: 200,370
Posted By JSF-TC

Love the workmanship Gary. A Craftsman at work. ...

Love the workmanship Gary. A Craftsman at work.

Paul
Showing results 1 to 23 of 23


 
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