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Search: Posts Made By: john4648
Showing results 1 to 24 of 24
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Forum: RC Jets
03-22-2012, 06:15 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Wires?
Forum: RC Jets
12-26-2011, 12:00 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Steve,

Tough question, they are all good turbines. I personally have flown the SJ with a Wren 54, Jetcat P70, and a K80.

Personally from my perspective only, the Kingtech Kerostart is the...
Forum: RC Jets
01-14-2011, 04:08 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Thats what I came up with as well Ken. Not very far in front of the neutral point. Interesting and not good for stability. I am flying at at 3/4" in front of manuals balance point. Or let me...
Forum: RC Jets
01-14-2011, 10:17 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Hi Ken

For some reason a lot of pictures are no longer showing up on RCU. Perhaps it is just me but I have no pictures on your old post.
At any rate the rear of my tank is 6.75" from the...
Forum: RC Jets
01-14-2011, 06:31 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Hi Ken

Conventional wisdom says balance the plane with UAT full, main tank empty. Am running the Kevlar Jettech tank. My tank is located forward of the recommended CG so the CG moves aft as fuel...
Forum: RC Jets
12-20-2010, 10:48 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Currently the SJ has a JetCat P70 (P70 just came back from JetCat for new bearings and ECU repair), but this same SJ has seen a Jet Central Super Bee II and a Jetjoe JJ1400. All flew it just fine....
Forum: RC Jets
12-20-2010, 09:40 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Very similar to mine, right at 15# depending on which turbine it has in it. Just a thought might consider keeping the CG towards the nose, perhaps even farther than the recommended. The plane is not...
Forum: RC Jets
12-19-2010, 02:28 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Use the Hanger 9 "Digital Servo & Receiver Current Meter" http://www.hangar-9.com/Products/Default.aspx?ProdID=HAN172 tells you how much current the servos are pulling. If not much more than the at...
Forum: RC Jets
12-13-2010, 07:15 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Think Gerry might be working on something :D....will let him expound though ;)...
John
Forum: RC Jets
12-10-2010, 09:42 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Limeybob,

I have one of your Jetmach60's it is a wonderful flyer! and will come out of a spin :D. Problem is for a lot of folks is construction. Most just do not have time, space or the skills...
Forum: RC Jets
12-10-2010, 06:52 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Sad SJ is no longer being carried by TBM. Perhaps there is a "new version" by MFJ? If not then maybe some other company will import the SJ. Is not TBM also changing their direction? Might relate to...
Forum: RC Jets
11-27-2010, 11:30 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Like using this fitting when going from 6mm to 4mm

http://dreamworksrc.com/catalog/product_info.php?products_id=97

Cheap and simple without doubling up on tubing which works OK as well....
Forum: RC Jets
11-22-2010, 12:04 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Has anybody put the SJ in a spin, a developed spin, and recovered? If so at what point is your CG? Also did you do anything special to recover? Thanks
John
Forum: RC Jets
11-22-2010, 10:35 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

My experience has been that an indication of a stall does not necessarily mean a spin. When I see the SJ start to drop or dip a wing at slow speed, I put the nose down to gather speed again. I do a...
Forum: RC Jets
11-20-2010, 08:58 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

The SJ I am flying currently has a P70 that seems to perform quite well. Advertised at 17.5# but seems like more. The SJ weighs 14.5# empty and contains the Jet tech tank. On take off climbs at a...
Forum: RC Jets
11-13-2010, 09:51 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Glad your initial flights went well. Yes it does fly a little different. Bit like a high wing trainer in some respects. That big wing makes some maneuvers interesting. However coming across the field...
Forum: RC Jets
11-11-2010, 10:07 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Set my ailerons neutral, then made the flaps the same. So sighting across the rear of the wing the ailerons and flaps are in alignment. But then I may be wrong, have had two now that would not come...
Forum: RC Jets
10-31-2010, 11:26 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

I agree probably no need to worry. AND nothing is better than a FOD screen mounted directly to the turbine. My thinking was with the P70 the SJ endures more stress. In this SJ the area/former at the...
Forum: RC Jets
10-31-2010, 10:13 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Have a P70 in mine. No Pix as yet. To get the P70 as far forward as possible, Relieved the fuse bottom just enough to allow the P70 front cover to sit just behind the former in front of the P70. To...
Forum: RC Jets
10-12-2010, 08:39 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Jim,

The first tube I made utilized 3" Aluminum dryer vent duct. Lasted only a few flights before the inside started to melt. After removing, the whole mass was able to be flattened like foil...
Forum: RC Jets
10-05-2010, 11:11 AM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

For what its worth, I split the elevator. Installed servos in each side of the fuselage in the existing cutouts. Used 4-40 hardware. Cheap redundancy that might save an expensive turbine. ;)

John
Forum: RC Jets
09-21-2010, 02:01 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Since Gerry mentioned his spin encounter thought I would relate mine....:eek:

Went to idle thrust at about 150' pulled the nose up into the most perfect stalled vertical ever seen, nose straight...
Forum: RC Jets
09-20-2010, 07:12 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

... three seconds could be a life time for the plane at 100' altitude or so....dont ask how I know[:-]:eek:

John
Forum: RC Jets
09-20-2010, 01:23 PM
Replies: 1,490
Views: 257,716
Posted By john4648

RE: TBM Shock Jet

Sorry to have your loss (or any loss)! Was this a "proven" system, had it been flown before? The RX would go into failsafe only if it loss signal from the TX. Then you would expect the surfaces to go...
Showing results 1 to 24 of 24


 
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